CN105074978B

CN105074978B - Conductive composition, electrical storage device collector, electrode for power storage device and electrical storage device with basalis

Info

Publication number: CN105074978B
Application number: CN201480009437.XA
Authority: CN
Inventors: 诸石顺幸; 松本刚士; 枡冈友明; 稻垣大
Original assignee: Toyo Ink SC Holdings Co Ltd; Toyocolor Co Ltd
Current assignee: Toyocolor Co Ltd; Artience Co Ltd
Priority date: 2013-02-21
Filing date: 2014-02-06
Publication date: 2017-09-22
Anticipated expiration: 2034-02-06
Also published as: WO2014129313A1; KR20150121030A; JP2014199804A; CN105074978A; KR102155177B1; JP5707605B2

Abstract

The present invention provides a kind of conductive composition, it contains conductive carbon material (A), water-soluble resin adhesive (B), water-dispersed resin particulate binder (C) and aqueous liquid medium (D), it is characterized in that, at conductive carbon material (A), the solid component content of water-soluble resin adhesive (B) and water-dispersed resin particulate binder (C) is added up in 100 weight %, the content of conductive carbon material (A) is 20~70 weight %, and in the solid component content of water-soluble resin adhesive (B) and water-dispersed resin particulate binder (C) adds up to 100 weight %, the content of water-soluble resin adhesive (B) is 40~95 weight %.Based on this, electric conductivity, the cohesive of the conductive composition are excellent, and dispersiveness, the cohesive of electrode of conductive carbon material are also excellent, and it is additionally operable to form the excellent electrical storage device of charge/discharge cycle characteristics.

Description

The collector of conductive composition, electrical storage device with basalis, electrical storage device are used Electrode and electrical storage device

Technical field

Used the present invention relates to a kind of conductive composition with the electrical storage device with the basalis obtained using said composition Collector, electrode for power storage device with basalis and the electrical storage device obtained using the electrode.

Background technology

In recent years, such as digital camera and can portable phone etc small portable electronic device, obtained extensively Popularization and application.Generally, it is desirable to which the volume of these electronic equipments reaches Min. and mitigates weight, and requires carried electricity Realize small-sized, light weight and high capacity in pond.Also, for the large secondary battery in terms of carrying purposes to automobile, also wish Prestige realizes large secondary battery to replace usual lead accumulator, and requires to be issued to further using the various environment of battery High life.And then, it is used as high-output power and the electrical storage device of high-energy-density, double layer capacitor, lithium-ion capacitance The capacitors such as device also attract attention.

Required in response to this, for the secondary cells such as lithium rechargeable battery, alkaline secondary battery and capacitor etc. The exploitation of electrical storage device, for example, (close material イ Application for the composite ink used in the formation of these electrode for power storage device キ), the exploitation of the basalis formation composition used in the formation of the basalis of composite layer (close material Layer), also increasingly by To concern.

As the key property required by the composite ink or basalis formation composition used in the formation of electrode, Moderately dispersed actives, uniformity formed by conductive carbon material and composite ink or basalis can be enumerated The cohesive for the electrode that formation is formed after the drying with composition.

In active material, the dispersity of conductive carbon material or basalis formation composition in composite ink The dispersity of conductive carbon material, with active material, the distribution of conductive carbon material or the substrate in composite layer The distribution of conductive carbon material in layer is relevant, and affects electrode physical property, or even influence battery performance.

Therefore, active material, the scattered of conductive carbon material are important problems.Especially high conductive carbon materials Material, because construction or specific surface area are big and cohesiveness is strong, either in composite ink or in basalis formation composition In, all it is difficult to uniform mixing, disperses.

Also, when the control of the dispersiveness or granularity of conductive carbon material is insufficient, because being formed without uniform conduction Network and fail reduce electrode internal resistance, the result is that the problem of causing electrode material performance to be not in full use send out It is raw.

In addition, to composite ink or basalis formation composition for, it is desirable to have appropriate mobility so as to It is coated on the surface of the metal foil as collector function.Also, in order to formed surface try one's best it is flat and in uniform thickness Composite layer and basalis, it is desirable to which composite ink or basalis formation have the viscosity of appropriateness with composition.Forming base When composite ink is coated with after bottom, in order to form composite layer, solvent resistance has also been required to basalis.

On the other hand, the substrate formed with composition is formed by the black composite layer formed of composite, by basalis Layer, after its formation, using its together with as base material metal foil cutting or be stamped into the section of required size, shape.It is therefore desirable to Composite layer, basalis have do not left in fresh-cut processing or punch process scar flintiness and occur without crackle, The cohesive do not peeled off.

In addition, the influence that the cohesive of electrode is produced to electrical storage device performance is big therefore critically important.Using lithium ion battery as Example, if the poor adhesion of electrode, can cause along with Lithium-ion embeding, the expansion of the active material of deintercalation, receipts during discharge and recharge The problem of electrode structure destruction or electrode are peeled off from collector caused by contracting, and battery life can be caused to deteriorate.

Because the environment using battery is various, particularly for the life-span, easily deterioration in high temperature environments, Therefore, in high temperature environments also can holding electrode cohesive, electric conductivity while, stand charge and discharge cycles durability become Obtain critically important.

In patent document 1, a kind of basalis is disclosed, it is by containing the water such as electric conductivity carbon dust and acrylate copolymer The conductive composition of dissolubility binding material, is coated on the collector of electrode and forms.In addition, in patent document 2, disclosing A kind of substrate formation composition, it is to mix hydrocarbon black powder and butyl rubber in toluene to be prepared from.But, this A little compositions are when as basalis, it is necessary to further improve its cohesive between collector, in addition it is also necessary to which improvement is by carbon Material dispersity is not enough and electric conductivity, the coating of influence, and it also requires improveing for composite ink to be coated on The solvent resistance of layer and indispensability, and the high life of further improvement battery is wished always.

Therefore, improved towards these, following content is disclosed in patent document 3~7：By import be cross-linked into grade come Binding material is improved, the high carbon fiber of electric conductivity is either utilized or is formed by using to the substrate that dispersant is used The high electrode of electric conductivity is obtained with composition.But, the use of the environment of battery is also various, for also standing height , it is necessary to further improve cohesive, the charge/discharge cycle characteristics of electrode for the battery of the environment such as temperature.

Prior art literature

Patent document

Patent document 1：Japanese Unexamined Patent Application 62-160656 publications；

Patent document 2：Japanese Unexamined Patent Application 63-121265 publications；

Patent document 3：Japanese Unexamined Patent Publication 7-201362 publications；

Patent document 4：Japanese Unexamined Patent Publication 2006-140142 publications；

Patent document 5：Japanese Unexamined Patent Publication 2007-226969 publications；

Patent document 6：Japanese Unexamined Patent Publication 2008-60060 publications；

Patent document 7：International Publication No. WO2012/173072 pamphlets.

The content of the invention

The invention problem to be solved

It is an object of the present invention to provide a kind of conductive composition, it is the excellent electric conductivity group of electric conductivity, cohesive Compound, and be the conductive composition for forming the excellent electrical storage device of charge/discharge cycle characteristics, wherein, in conductive carbon Dispersiveness, the cohesive of the electrode aspect of material are excellent.

The method for solving problem

The present invention is a kind of conductive composition, and it contains conductive carbon material (A), water-soluble resin with particular range and glued Mixture (B) and water-dispersed resin particulate binder (C), it can not damage the dispersed feelings of conductive carbon material (A) Under condition, cohesive, the solvent resistance of electrode are improved, and then improve the charge/discharge cycle characteristics of electrical storage device.

That is, the present invention relates to a kind of conductive composition, it contains conductive carbon material (A), water-soluble resin adhesive (B), water-dispersed resin particulate binder (C) and aqueous liquid medium (D), it is characterised in that

Consolidate in conductive carbon material (A), water-soluble resin adhesive (B) and water-dispersed resin particulate binder (C) Body component content is added up in 100 weight %, and the content of conductive carbon material (A) is 20~70 weight %,

Added up in the solid component content of water-soluble resin adhesive (B) and water-dispersed resin particulate binder (C) In 100 weight %, the content of water-soluble resin adhesive (B) is 40~95 weight %.

Moreover, it relates to a kind of above-mentioned conductive composition, it is characterised in that it is the base of electrode for power storage device Bottom formation conductive composition.

Moreover, it relates to a kind of collector of electrical storage device with basalis, wherein, it has：Collector；With And the basalis formed by above-mentioned conductive composition.

Moreover, it relates to a kind of electrode for power storage device, wherein, it has：Collector；Combined by above-mentioned electric conductivity The basalis of thing formation；And the composite formed by the composition for electrode formation containing electrode active material and adhesive Layer.

Moreover, it relates to a kind of electrical storage device, it has positive pole, negative pole and electrolyte, wherein, aforementioned positive electrode is with before It is above-mentioned electrode for power storage device to state at least one of negative pole.

Moreover, it relates to above-mentioned conductive composition, the above-mentioned collector with basalis, above-mentioned electrode or above-mentioned Electrical storage device, it is characterised in that electrical storage device is secondary cell or capacitor.

The effect of invention

The present invention can provide a kind of electrical storage device, and it with specific ratios by containing conductive carbon material (A), water solubility Resin binder (B) and water-dispersed resin particulate binder (C), can not damage electric conductivity carbon materials in conductive composition In the case of the dispersiveness of material, the excellent basalis of the cohesive to collector is formed, electrical storage device is harsh even in high temperature etc. Used under environment, it may have good charge/discharge cycle characteristics.

Embodiment

The electrode of electrical storage device can be obtained using various methods.For example, (1) can be used containing active material and The ink-like composition (calling in the following text " composite ink ") of solvent；(2) composite containing active material, conductive auxiliary agent and solvent Ink；(3) the composite ink containing active material, adhesive and solvent；Or (4) contain active material, conductive auxiliary agent, adhesive With the composite ink of solvent, composite layer is formed on the surface of the collector of metal foil etc., so as to obtain electrode.

Or, using the basalis formation composition containing conductive carbon material and liquid medium metal foil current collection The surface of body forms basalis, and using black (1)~(4) of above-mentioned composite or other composites ink on the basalis Composite layer is formed, electrode is also resulted in.

In any case, the dispersity of conductive carbon material, the cohesive of electrode influence electrical storage device performance, this Have been carried out describing in detail in the background section.Therefore, conductive composition of the invention, can be used in being formed well Basalis.

As previously described, conductive composition of the invention, can as electrical storage device basalis formation electric conductivity Composition is used.It is micro- that conductive composition contains conductive carbon material (A), water-soluble resin adhesive (B), water-dispersed resin Grain adhesive (C) and aqueous liquid medium (D).

The ratio that conductive carbon material (A) occupies in the total solid content content of conductive composition be 20 weight % with Upper and below 70 weight %, preferably more than 25 weight % and below 60 weight %.If conductive carbon material (A) is very few, have When basalis can not keep electric conductivity；On the other hand, if conductive carbon material (A) excessively, cohesive of film etc. sometimes Durability is reduced.

In addition, water-soluble resin adhesive (B) is in water-soluble resin adhesive (B) and water-dispersed resin particulate binder (C) solid component content it is total in the ratio occupied be more than 40 weight % and below 95 weight %.If water-soluble resin The ratio of adhesive (B) is excessive, then the cohesive of electrode becomes insufficient sometimes；On the other hand, if water-soluble resin adhesive (B) ratio is too small, then solvent resistance can be caused not enough, good basalis can not be formed sometimes.Forming good substrate Layer aspect, water-soluble resin adhesive (B) and water-dispersed resin particulate binder (C) are used with above-mentioned specific ratio combine It is very important.

In addition, the proper viscosity of conductive composition, although different because of the coating method of conductive composition, but it is generally excellent Choosing is set to more than 10mPas and below 30000mPas.

As conductive carbon material (A), as long as conductive carbon material is just not particularly limited, can individually it make With or and with two or more following carbon materials：(CNT, carbon nano-fiber, carbon are fine for graphite, carbon black, conductive carbon fibers Dimension), fullerene etc..From electric conductivity, the angle of easness and cost is obtained, carbon black is preferably used.

As carbon black, it can be used alone or and with two or more following various carbon blacks：The Continuous Heat point in reacting furnace Furnace black manufactured by solution gas raw material or liquid charging stock, is especially used as the Ketjen black of raw material using ethene heavy oil；To fire Burn the channel black that unstrpped gas makes its flame quickly cool down, separate out on the steel bottom surface of groove；Using gas as raw material periodically Burning and the obtained pyrolytic carbon black of thermal decomposition is repeated, acetylene carbon black of raw material etc. is especially used as using acetylene gas.And And, it can also use the carbon black for being applied with the oxidation processes generally carried out, hollow carbon etc..

The oxidation processes of carbon, are by the way that carbon to be carried out to high-temperature process in atmosphere or with nitric acid, nitrogen dioxide, ozone etc. After-treatment is carried out directly to import (covalent bond) such as oxygen containing pole of phenolic group, quinonyl, carboxyl, carbonyl etc on carbon surface The processing of property functional group, the processing is generally carried out in order to improve the dispersed of carbon.But, if the amount for importing functional group is more, Then the electric conductivity of usual carbon is lower, it is therefore preferable that using the carbon for not carrying out oxidation processes.

If the value of the specific surface area of carbon black used is bigger, the contact point between carbon black particle more increases, so as to become Advantageously reduce electrode interior resistance.Specifically, in terms of the specific surface area (BET) calculated by the adsorbance according to nitrogen, it is desirable to The specific surface area of carbon black used is 20m²/ more than g and 1500m²/ below g, preferably 50m²/ more than g and 1500m²/ below g, more Preferably 100m²/ more than g and 1500m²/ below g.If the specific surface area of carbon black used is less than 20m²/ g, then become to be difficult to sometimes Obtain sufficient electric conductivity；Surface area is contrasted more than 1500m²For/g carbon black, it is difficult to obtain from commercially available material sometimes.

Also, the particle diameter of carbon black used, is preferably 0.005~1 μm, particularly preferably 0.01~0.2 μ in terms of primary particle size m.Wherein, primary particle size described herein, refers to the average value of particle diameter determined using electron microscope etc..

As dispersion particle diameter of the conductive carbon material (A) in conductive composition, preferably miniaturization is to more than 0.03 μm And less than 5 μm.It is less than 0.03 μm of composition as the dispersion particle diameter of the carbon material of conductive auxiliary agent, difficulty is prepared sometimes.In addition, When using as composition of the dispersion particle diameter of the carbon material of conductive auxiliary agent more than 5 μm, composite film is produced sometimes Material skewness, uneven etc. the defect of distribution of resistance of electrode.

Dispersion particle diameter described herein, refers in volume particle size distribution from its accumulative particle of the small particle of particle diameter Particle diameter (D50) when reaching 50% during volume ratio.The particle diameter is measured using common particles distribution instrument, for example, adopt With the particles distribution instrument of dynamic light scattering mode, (" マイ Network ロトラッ Network UPA " (trade name), (day Machine fills for Ji Zhuan companies Society) manufacture) etc. be measured.

As commercially available carbon black, for example, can enumerate：(the business such as トーカ Block ラッ Network #4300, #4400, #4500, #5500 The name of an article claims, furnace black, (East Hai カーボ Application society of East Sea carbon company) manufacture)；(trade names, oven process such as プリ Application テッ Network ス L Carbon black, goldschmidt chemical corporation (デグサ societies) manufacture)；Raven7000,5750,5250,5000ULTRAIII, 5000ULTRA etc., Conductex SC ULTRA, Conductex 975ULTRA etc., (trade name, oven process such as PUER BLACK100,115,205 Carbon black, examines sub- company (the U ロンビヤン societies) manufacture of rival)；#2350、#2400B、#2600B、#30050B、#3030B、# 3230B, #3350B, #3400B, #5400B etc. (trade name, furnace black, the manufacture of society of Mitsubishi Chemical)；MONARCH1400、 1300th, 900, (trade name, furnace black, Cabot Co., Ltd (the キャボット such as VulcanXC-72R, BlackPearls2000 Society) manufacture)；Ensaco250G, Ensaco260G, Ensaco350G, SuperP-Li (trade name, Te Migao companies (TIMCAL societies) manufactures)；Ketjen black EC-300J, EC-600JD (trade name, Aksu company (ア Network ゾ societies) manufacture)； DENKA BLACK, DENKA BLACK HS-100, FX-35 (trade name, acetylene carbon black, electrochemical industry company (Electricity mood Learn industry) manufacture) etc..As graphite, for example, Delanium or flaky graphite, blocky graphite, amorphous graphite etc. can be enumerated Native graphite, but be not limited to these, can be applied in combination therein two or more.

Can be the conductive carbon fibers burnt till and obtained from the raw material of petroleum resources as conductive carbon fibers, Also the conductive carbon fibers burnt till and obtained from the raw material of plant origin can be used.Come for example, can enumerate with oil VGCF of Showa electrician society manufacture that the raw material in source is made etc..

<Water-soluble resin adhesive (B)>

Water-soluble resin adhesive (B) is a kind of adhesive as described below：1g is added in 25 DEG C of 99g water water-soluble Resin binder (B) is simultaneously stirred, after 25 DEG C are placed 24 hours, and adhesive can be dissolved completely in water without occurring separation, analysis Go out.

As water-soluble resin adhesive (B), as long as water miscible resin as described above is shown, not It is special to limit, for example, can enumerate sub- including acrylic resin, polyurethane resin, polyester resin, polyamide, polyamides Polyimide resin, polyallyl polyimide resin (Port リアリ Le アミ Application Trees fat), phenolic resin, epoxy resin, phenoxy resin, urea tree The tree of the polysaccharide of fat, melmac, alkyd resin, formaldehyde resin, silicone resin, fluororesin, carboxymethyl cellulose etc. The high-molecular compound of fat.As long as also, water miscible or these resins modifiers, mixture or copolymerization Thing.One or more combinations of these adhesives can be used.

<Water-dispersed resin particulate binder (C)>

Water-dispersed resin particulate binder (C) is a kind of adhesive as described below：Water-based emulsion is generally also referred to as, Adhesive resin is not dissolved in water, is disperseed in the way of particulate.

The emulsion used is not particularly limited, (methyl) acrylic emulsion, nitrile system emulsion, poly- ammonia can be enumerated Ester system emulsion, diene series emulsion (SBR etc.), fluorine system emulsion (PVDF, PTFE etc.) etc..It is different from water soluble polymer, it is used as breast Liquid is preferably interparticle caking property and the excellent emulsion of flexibility (flexibility of film).

(particle structure of emulsion)

In addition, the particle structure of water-dispersed resin particulate binder (C), may be set to sandwich construction, you can be set to institute The core-shell particles of meaning.For example, by making the resin being polymerized based on the monomer with functional group locally lie in core Portion or shell portion, or difference is set on Tg, composition according to core and shell, thus, it is possible to improve hardening, drying property, film forming, The mechanical strength of adhesive.

(particle diameter of emulsion)

From the viewpoint of caking property, particle stability, the preferred average grain diameter of water-dispersed resin particulate binder (C) For 10~500nm, more preferably 10~300nm.If in addition, particle largely can be damaged containing the oversize grain for having more than 1 μm Stability, it is therefore preferable that the oversize grain more than 1 μm is at most below 5%.In addition, the average grain diameter is to represent that volume is put down Equal particle diameter, can be measured using dynamic light scattering method.

The measure of the average grain diameter carried out based on dynamic light scattering method, can be implemented in the following way.By cross-linking type tree Fat particle dispersion liquid, corresponding to solid component content with water beforehand dilution to 200~1000 times.The about 5mL dilution is noted In the cuvette for entering to determine device (" マイ Network ロトラッ Network " (trade name), Ji Zhuan companies ((strain) day Machine dress) manufacture), Input is measured after corresponding to the solvent (being water in the present invention) and the refractive index condition of resin of sample.With the body now obtained The peak value of product particle size distribution data (histogram) is used as average grain diameter.

When using (methyl) acrylic emulsion, crosslinked resin particulate described below is preferably comprised.The crosslinking Type resin particle, represents the resin particle with internal cross-linked structure (three-D cross-linked structure), it is important that in inside particles It is crosslinked.Crosslinked resin particulate, by taking cross-linked structure to be able to ensure that electrolyte resistance elution property, by adjusting particle Internal crosslinking can improve its effect.In addition, by making crosslinked resin particulate contain specific functional group, can aid in Cohesive between collector, electrode.And then, by adjusting cross-linked structure, the amount of functional group, result in electrical storage device Durability in terms of excellent conductive composition.

(it is crosslinked between particle) in addition, also can and be cross-linked with each other in crosslinking with particle, but after being in most cases now Crosslinking agent is added, therefore, agent composition can be also crosslinked sometimes and is spilt to electrolyte or deviation occurs when prepared by electrode.Cause This, crosslinking agent needs to use in the degree for not damaging electrolyte resistance.

It is adapted to the crosslinked resin particulate in (methyl) acrylic emulsion for using, is in water, in interfacial agent In the presence of, by radical polymerization initiator, the resin particle that ethylene unsaturated monomer is subjected to emulsion polymerization and obtained. It is adapted to (methyl) acrylic emulsion used, preferably by the way that the second of following monomer groups (C1) and (C2) will be contained with following ratios Alkene unsaturated monomer carries out emulsion polymerization and obtained.

(C1) from by the ethylene unsaturated monomer (c1) with simple function or multifunctional alkoxysilyl and one At least one monomer selected in the group that the monomer (c2) with more than two ethene unsaturated groups is constituted in individual molecule： 0.1~5 weight %；

(C2) ethylene unsaturated monomer (c3) in addition to aforementioned monomer (c1)~(c2)：95~99.9 weight %.

Wherein, foregoing (c1)~(c3) total amount is set to 100 weight %.

It is adapted to the ethylene unsaturated monomer of the composition crosslinked resin particulate in (methyl) acrylic emulsion for using In (c1), (c3), unless otherwise prescribed, represent that there is the monomer of ethene unsaturated group in a molecule.

Functional group's (alkoxysilyl, ethene unsaturated group) that contained monomer has in monomer group (C1), be Self-cross linking type reactive functional groups, mainly there is the effect that inside particles crosslinking is formed in particle synthesis.By fully carrying out grain The internal crosslinking of son, it is possible to increase electrolyte resistance.Therefore, by using monomer contained in monomer group (C1), it can be formed Crosslinked resin particulate.In addition, by fully carrying out particle crosslinking, it is possible to increase electrolyte resistance.

It is used as the monomer (c1) in a molecule with an ethene unsaturated group and alkoxysilyl, example Such as, γ-methacryloxypropyl trimethoxy silane, γ-methacryloxypropyl triethoxy can be enumerated Silane, the butoxy silane of γ-methacryloxypropyl three, γ-methacryloyloxypropyl methyl dimethoxy silicon Alkane, γ-methacryloyloxypropyl methyl diethoxy silane, γ-acryloxypropyl trimethoxy silane, γ- Acryloxypropyl triethoxysilane, γ-acryloxypropyl dimethoxysilane, γ-methacryl Epoxide MTMS, γ-acryloyloxymethyl trimethoxy silane, vinyltrimethoxy silane, vinyl Triethoxysilane, vinyltributoxysilane, vinyl methyl dimethoxysilane etc..

As the monomer (c2) in a molecule with more than two ethene unsaturated groups, for example, can enumerate (methyl) allyl acrylate, (methyl) acrylic acid 1- methylallyl isocyanurates, (methyl) acrylic acid 2- methylallyl isocyanurates, (methyl) Acrylic acid 1- butene esters, (methyl) acrylic acid 2- butene esters, (methyl) acrylic acid 3- butene esters, (methyl) acrylic acid 1,3- Methyl -3- butene esters, (methyl) acrylic acid 2- chlorine allyl ester, (methyl) acrylic acid 3- chlorine allyl ester, (methyl) acrylic acid O-allyl base ester, (methyl) acrylic acid 2- (allyloxy) ethyl ester, (methyl) acrylic acid pi-allyl lactoyl ester, (methyl) Acrylic acid citronellyl acrylate, (methyl) acrylic acid geraniol ester, (methyl) acrylic acid rose ester, (methyl) acrylic acid cinnamic ester, maleic acid Diallyl, diallyl itaconate, (methyl) vinyl acrylate, Vinyl crotonate, oleic acid vinyl acetate, leukotrienes ethene (methyl) acrylic acid containing ethene unsaturated group such as ester, (methyl) acrylic acid 2- (2'- vinyloxyethoxies) ethyl ester Esters；Two (methyl) acrylic acid ethylene glycol, two (methyl) acrylic acid triethylene glycols, two (methyl) acrylic acid tetraethylene glycols, three (first Base) acrylic acid trimethylolpropane, three (methyl) acrylic acid pentaerythrites, diacrylate 1,1,1- trimethylolethanes, 3 third Multifunctional (methyl) esters of acrylic acid such as olefin(e) acid 1,1,1- trimethylolethanes, 1,1,1- trimethylolpropane tris acrylic acid； The divinyl base class such as divinylbenzene, vinyl hexanediacetate；Properties of diallyl isophathalate, diallyl phthalate Diallyl classes such as ester, maleic acid diallyl ester etc..

Monomer (c1) or alkoxysilyl or ethene unsaturated group in monomer (c2), mainly with polymerization Self condensed respectively or polymerize and cross-linked structure is imported in particle as purpose, but one part can also be residual after polymerisation Stay on inside particles or surface.The alkoxysilyl or ethene unsaturated group of residual, contribute to adhesive composition Particle between crosslinking.Particularly alkoxysilyl, due to possessing the cohesive being favorably improved for collector Effect, therefore preferably.

Contained monomer in monomer group (C1), it is characterised in that used whole ethene used in emulsion polymerization not 0.1~5 weight % in saturation monomer (total 100 weight %).Preferably 0.5~3 weight %.If contained in monomer group (C1) Monomer be less than 0.1 weight %, then the crosslinking of particle can become insufficient, and electrolyte resistance is deteriorated.If in addition, more than 5 weights % is measured, then can be gone wrong in emulsion polymerization on polymerization stability, or can also preserve stable even if polymerization is completed Gone wrong in property.

Be adapted to the crosslinked resin particulate in (methyl) acrylic emulsions for using, can by for above-mentioned at one There is the monomer (c1) of an ethene unsaturated group and alkoxysilyl in molecule and there are two in a molecule More than ethene unsaturated group monomer (c2), also have as having beyond monomer group (C2) demonomerization (c1), (c2) The monomer (c3) of ethene unsaturated group is while carrying out emulsion polymerization and obtaining.

As the monomer (c3), as long as the monomer with ethene unsaturated group in addition to monomer (c1), (c2) Just there is no particular limitation, for example, can use from by having an ethene unsaturated group and simple function in a molecule Or multi-functional epoxy's base monomer (c4), in a molecule have an ethene unsaturated group and simple function or multifunctional acyl The monomer (c5) of amido and the monomer in a molecule with an ethene unsaturated group and simple function or multifunctional hydroxyl (c6) at least one monomer selected in the group constituted, and having in addition to monomer (c1), (c2), (c4)~(c6) The monomer (c7) of ethene unsaturated group.

By using monomer (c4)~(c6), epoxy radicals, amide groups or remaining hydroxyl groups can be made in crosslinked resin particulate Inside particles or surface, the physical property such as the cohesive thus, it is possible to improve collector.For monomer (c4)~(c6), i.e., Make after particle is synthesized, its functional group also easily residues in inside particles or surface, and in the case where amount is few also to current collection The cohesive effect of body is big.In addition, one part can be used for cross-linking reaction, by adjusting the crosslinking degree of these functional groups, The balance of electrolyte resistance and cohesive can be obtained.

It is used as the monomer in a molecule with an ethene unsaturated group and simple function or multi-functional epoxy's base (c4), for example, (methyl) glycidyl acrylate, (methyl) acrylic acid 3,4- epoxycyclohexyethylSiOi esters etc. can be enumerated.

It is used as the monomer in a molecule with an ethene unsaturated group and simple function or multifunctional amide groups (c5), for example, can enumerate：The ethylene unsaturated monomers containing primary amide base such as (methyl) acrylamide；N- methylols third Acrylamide, N, the alkylol such as N- bis- (methylol) acrylamide, N- methylol-N- methoxies (methyl) acrylamide Base (methyl) acrylic amide；N- methoxies-(methyl) acrylamide, N- ethoxyl methyls-(methyl) acryloyl Amine, N- propoxy methyls-(methyl) acrylamide, N- butoxymethyls-(methyl) acrylamide, N- amoxy first Base-(methyl) acrylamide etc. monoalkoxy (methyl) acrylic amide；N, N- bis- (methoxy) acrylamide, N- Ethoxyl methyl-N- methoxy methyls butylmethacrylamide, N, N- bis- (ethoxyl methyl) acrylamide, N- (ethoxymethyl)s Base-N- propoxy methyls Methacrylamide, N, N- bis- (propoxy methyl) acrylamide, N- butoxymethyls-N- (propoxy methyl) Methacrylamide, N, N- bis- (butoxymethyl) acrylamide, N- butoxymethyl-N- (methoxies Ylmethyl) Methacrylamide, N, N- bis- (amoxy methyl) acrylamide, N- methoxies-N- (amoxy first Base) dialkoxy (methyl) acrylic amide such as Methacrylamide；N, N- dimethylaminopropylacryl acid amides, N, N- bis- The dialkyl amidos such as diethylaminobutyyl acrylamide (methyl) acrylic amide；N, N- DMAA, N, N- bis- The dialkyl group such as ethyl acrylamide (methyl) acrylic amide；(methyl) third containing ketone group such as diacetone (methyl) acrylamide Acrylamide etc..

As the monomer (c6) in a molecule with an ethene unsaturated group and simple function or multifunctional hydroxyl, For example, (methyl) acrylic acid 2- hydroxyl ethyl esters, (methyl) acrylic acid 2- hydroxypropyl acrylates, (methyl) acrylic acid 4- hydroxyl fourths can be enumerated Ester, 2- (methyl) acryloyl-oxyethyl -2- ethoxys phthalic acid, (methyl) propylene monoglyceride, 4- hydroxyls Vinyl benzene, 1- acetenyl -1- cyclohexanol, allyl alcohol etc..

The functional group of contained monomer in monomer (c4)~(c6), one part can react in particle polymerization and can For being crosslinked in particle.Contained monomer in monomer (c4)~(c6), it is characterised in that complete used in having used in emulsion polymerization 0.1~20 weight % in portion's ethylene unsaturated monomer (total 100 weight %).Preferably 1~15 weight %, particularly preferably For 2~10 weight %.If the monomer in the whole ethylene unsaturated monomers (total 100 weight %) used in emulsion polymerization (c4)~(c6) is less than 0.1 weight %, then the amount of the functional group remained after polymerizeing on inside particles, surface is reduced, it is impossible to right The cohesive for improving collector makes abundant contribution.If, can be in emulsion polymerization in polymerization-stable in addition, more than 20 weight % Property on go wrong, or even if complete polymerization can also be gone wrong on storage stability.

As monomer (c7), as long as have ethene unsaturated in addition to monomer (c1), (c2), (c4)~(c6) Just there is no particular limitation for the monomer of base, for example, can enumerate has an ethene unsaturated group and carbon in a molecule The monomer (c8) of the alkyl of atomicity 8~18, the list with an ethene unsaturated group and cyclic structure in a molecule Body (c9) etc..When using monomer (c8) and/or monomer (c9) as monomer (c7) in emulsion polymerization (as monomer (c7) monomer in addition to them can also be contained), preferably the monomer (c8) and (c9) are all with ethene unsaturated group Monomer ((c1), (c2), (c4)~(c6) and (c7)) in using total gauge content as 30~95 weight %.Using monomer (c8), in the case of monomer (c9), the particle stability, electrolyte resistance when particle is synthesized are excellent, therefore preferably.If less than 30 Weight %, then produce harmful effect to electrolyte resistance sometimes；If more than 95 weight %, when being synthesized sometimes to particle Stability produce harmful effect or even if synthesis after the completion of can also damage the ageing stability of particle.

It is used as the monomer of the alkyl in a molecule with an ethene unsaturated group and carbon number 8~18 (c8), for example, (methyl) 2-EHA, (methyl) lauryl acrylate, (methyl) acrylic acid Pork and beans can be enumerated Cool ester, (methyl) acrylic acid cetyl, (methyl) stearyl acrylate acyl ester etc..

As having an ethene unsaturated group and the monomer (c9) of cyclic structure in a molecule, fat can be enumerated Ring type ethylene unsaturated monomer, aromatic vinyl unsaturated monomer etc..It is used as ester ring type ethylene unsaturated monomer, example Such as, (methyl) cyclohexyl acrylate, (methyl) isobornyl acrylate etc. can be enumerated；It is unsaturated single as aromatic vinyl Body, for example, can enumerate (methyl) benzyl acrylate, (methyl) acrylate, styrene, α-methylstyrene, 2-methyl styrene, chlorostyrene, allyl benzene, acetylenylbenzene etc..

As the monomer (c7) in addition to above-mentioned monomer (c8), monomer (c9), for example, can enumerate：(methyl) propylene Sour methyl esters, (methyl) ethyl acrylate, (methyl) propyl acrylate, (methyl) n-butyl acrylate, (methyl) amyl acrylate, The ethylene unsaturated monomers containing alkyl such as (methyl) heptylacrylate；The ethene containing itrile group such as (methyl) acrylonitrile are not Saturation monomer；(methyl) perfluoroethyl methyl formate, (methyl) perfluoroethyl ethyl methyl esters, (methyl) acrylic acid 2- are complete Fluorine butyl ethyl ester, (methyl) acrylic acid 2- perfluoro hexyls ethyl ester, (methyl) acrylic acid 2- perfluorooctylethyls, (methyl) propylene Sour 2- perfluors isononyl ethyl ester, (methyl) acrylic acid 2- perfluor nonyls ethyl ester, (methyl) acrylic acid 2- perfluoro decyls ethyl ester, (methyl) perfluoroethyl propyl group propyl ester, (methyl) perfluoroethyl octyl group propyl ester, (methyl) perfluoroethyl octyl group pentyl ester, Ester of (methyl) perfluoroethyl octyl group 11 etc. has the ethene containing perfluoroalkyl of the perfluoroalkyl of carbon number 1~20 Unsaturated monomer；Perfluorobutyl ethylene, perfluorohexyl ethylene, perfluorooctyl ethylene, perfluoro decyl ethene etc. contain perfluor alkane The ethene unsaturated compound containing perfluoroalkyl of base, alkylene base class etc.；Polyethylene glycol (methyl) acrylate, methoxyl group Polyethylene glycol (methyl) acrylate, ethyoxyl polyethylene glycol (methyl) acrylate, propoxyl group polyethylene glycol (methyl) propylene Acid esters, n-butoxy polyethylene glycol (methyl) acrylate, n-pentyloxy polyethylene glycol (methyl) acrylate, the poly- second of phenoxy group Glycol (methyl) acrylate, polypropylene glycol (methyl) acrylate, methoxyl group polypropylene glycol (methyl) acrylate, ethyoxyl Polypropylene glycol (methyl) acrylate, propoxyl group polypropylene glycol (methyl) acrylate, n-butoxy polypropylene glycol (methyl) third Olefin(e) acid ester, n-pentyloxy polypropylene glycol (methyl) acrylate, phenoxy group polypropylene glycol (methyl) acrylate, polytetramethylene Glycol (methyl) acrylate, methoxyl group polytetramethylene glycol (methyl) acrylate, phenoxy group tetraethylene glycol (methyl) third Olefin(e) acid ester, six ethylene glycol (methyl) acrylate, the ethylene glycol of methoxyl group six (methyl) acrylate etc. have the ethene of polyether chain Property unsaturated compound；Lactone-modified (methyl) acrylate etc. has the ethene unsaturated compound of polyester chain；(methyl) Acrylate ethyl-methyl chloride salt, trimethyl -3- (1- (methyl) acrylamide -1,1- dimethyl propylenes Base) ammonium chloride, trimethyl -3- (1- (methyl) acrylamide propyl) ammonium chlorides and trimethyl -3- (1- (methyl) Acrylamide -1,1- dimethyl ethyls) ammonium chloride etc. the ethene unsaturated compound containing quaternary ammonium salt base；Vinyl acetate Ester, vinyl butyrate, propionate, vinyl caproate, sad vinyl acetate, vinyl laurate, vinyl palmitate, tristearin The fatty acid vinyl ester based compound such as vinyl acetate；The vinyl ethers such as butyl vinyl ether, ethyl vinyl ether system ethene is not Saturation monomer；The alpha-olefins such as 1- hexenes, 1- octenes, 1- decene, 1- dodecylenes, tetradecene, cetene It is ethylene unsaturated monomer；The allyl monomers such as allyl acetate, allyl cyanide；Ethene cyanogen, vinyl cyclohexane, ethene first The vinyl monomers such as base ketone；Ethynyl monomers such as acetylene, acetenyl toluene etc..

In addition, as the monomer (c7) in addition to above-mentioned monomer (c8), monomer (c9), for example, can enumerate：Malaysia Acid, fumaric acid, itaconic acid, citraconic acid or their alkyl or alkenyl monoesters, phthalic acid β-(methyl) acryloxy Ethyl monoesters, M-phthalic acid β-(methyl) acryloyl-oxyethyl monoesters, terephthalic acid (TPA) β-(methyl) acryloxy second Base monoesters, butanedioic acid β-(methyl) acryloyl-oxyethyl monoesters, acrylic acid, methacrylic acid, crotonic acid, cinnamic acid etc. contains carboxylic The ethylene unsaturated monomer of base；The ethylene unsaturated monomers containing the tert-butyl group such as (methyl) tert-butyl acrylate；Vinyl Sulfonic acid, styrene sulfonic acid etc. contain sulfonic ethylene unsaturated monomer；Methacrylic acid (2- ethoxys) ester acid phosphorus The ethylene unsaturated monomer containing phosphate such as acid esters；Diacetone (methyl) acrylamide, methacrylaldehyde, N- vinyl formyls Amine, ethylene methyl ketone, ethylene ethyl ketone, (methyl) acrylic acid acetoacetoxyethyl, (methyl) acrylic acid acetoacetyl oxygen The ethylene unsaturated monomers containing ketone group such as base propyl ester, (methyl) acrylic acid acetoacetoxy groups butyl ester are (in a molecule Monomer with an ethene unsaturated group and ketone group) etc..

When using the ethylene unsaturated monomer containing ketone group as monomer (c7), there will be two as crosslinking agent The multifunctional hydrazide compound of the hydrazide group that can be reacted with ketone group above is mixed in adhesive composition, pass through ketone group and acyl Crosslinking between diazanyl, results in tough and tensile film.There is more excellent electrolyte resistance, caking property based on this.Also, In the case where repeating discharge and recharge, the hot environment of heating, tolerance and flexibility can be had both, make charge and discharge cycles therefore, it is possible to obtain Long-life electrical storage device that the reduction of middle discharge capacity is reduced.

In addition, for having carboxyl, the tert-butyl group in monomer (c7), (due to heat, the tert-butyl alcohol can occur to depart from and become carboxylic Base), the ethylene unsaturated monomer of sulfonic group and phosphate carry out resin particle obtained by copolymerization, after polymerisation, foregoing official Can roll into a ball can also residue in particle or on surface, the effect not only with physical properties such as the cohesives for improving collector, and Aggegation during synthesis is prevented sometimes or the particle stability after synthesis is kept, therefore, it is possible to preferably use.

Carboxyl, the tert-butyl group, sulfonic group and phosphate, one part can react in polymerization and for being handed in particle Connection.When using the monomer containing carboxyl, the tert-butyl group, sulfonic group and phosphate, whole second for emulsion polymerization are preferably comprised 0.1~10 weight %, further preferably 1~5 weight % in alkene unsaturated monomer (total 100 weight %).If containing carboxylic Base, the tert-butyl group, the monomer of sulfonic group and phosphate are less than 0.1 weight %, then the bad stability of particle sometimes.If in addition, super 10 weight % are crossed, then the hydrophily of adhesive composition become too strong and electrolyte resistance is deteriorated sometimes.And then, these functions Group can react when drying and be used in particle, interparticle crosslinking.

For example, in polymerization with dry when, carboxyl can with epoxy reaction and cross-linked structure is imported in resin particle. Similarly, to the tert-butyl group apply certain temperature more than heat when can also generate the tert-butyl alcohol and while formed carboxyl, therefore, it is possible to It is foregoing similarly to be reacted with epoxy radicals.

In order to adjust the polymerization stability, glass transition temperature and then adjustment film forming, film physical property of particle, What these monomers (c7) can combine in the above-mentioned monomer enumerated two or more is used.In addition, for example, by and with (first Base) acrylonitrile etc., with the effect for embodying caoutchouc elasticity.

Using previously known emulsion polymerisation process, the cross-linking type in (methyl) acrylic emulsion for being adapted to use is synthesized Resin particle.

As emulsifying agent, the known reactive emulsifier with ethene unsaturated group, no can be arbitrarily used The emulsifying agents such as the non-reacted emulsifying agent with ethene unsaturated group.

Reactive emulsifier with ethene unsaturated group can also substantially divide into anion system, nonionic system (nonionic) emulsifying agent is illustrated.Particularly, if using the anion system reactivity with ethene unsaturated group Emulsifying agent or nonionic reactive emulsifier, then the dispersion particle diameter of copolymer becomes fine and size distribution narrow, so as to make Come for electrical storage device (for example, secondary cell) electrode binding agent in use, electrolyte resistance can be improved, therefore preferably.It is right This has for the anion system reactive emulsifier or nonionic reactive emulsifier of ethene unsaturated group, both can be single Solely a variety of use can also be mixed using one kind.

As an example of the anion system reactive emulsifier with ethene unsaturated group, its tool is illustrated below Style, but emulsifying agent is not limited to emulsifying agent described below.

As emulsifying agent, it can enumerate：Alkyl ether system is (as commercially available product, for example, Di-ichi Kogyo Seiyaku Co., Ltd. ( One Gong Ye System medicines Co., Ltd.) manufacture ア Network アロ Application KH-05, KH-10, KH-20, Chinese mugwort Dicon A/S (Co., Ltd. ADEKA) アデカリアソープ SR-10N, SR-20N of manufacture, the ラテ system Le PD-104 of Kao Corp's manufacture Deng)；Sulfosuccinate system (as commercially available product, for example, the ラテ system Le S-120 of Kao Corp's manufacture, S-120A, S-180P, S-180A, エレミノー Le JS-2 of Sanyo Chemical Industries Co., Ltd.'s manufacture etc.)；Alkyl phenyl ether system or alkyl Phenyl ester system is (as commercially available product, for example, the ア Network ア of Di-ichi Kogyo Seiyaku Co., Ltd. (the first Gong Yesystemyao Co., Ltd.) manufacture ロ Application H-2855A, H-3855B, H-3855C, H-3856, HS-05, HS-10, HS-20, HS-30, end Dicon A/S アデカリアソープ SDX-222, SDX-223, SDX-232, SDX-233, SDX- of (Asahi Denka Co., Ltd.) manufacture 259th, SE-10N, SE-20N etc.)；(methyl) acrylate sulfuric ester system is (as commercially available product, for example, Japanese emulsifying agent strain formula ア Application トッ Network ス MS-60, MS-2N of commercial firm's manufacture, the エレミノー Le RS-30 of Sanyo Chemical Industries, Ltd.'s manufacture Deng)；Phosphate system is (as commercially available product, for example, what Di-ichi Kogyo Seiyaku Co., Ltd. (the first Gong Yesystemyao Co., Ltd.) manufactured H-3330PL, the アデカリアソープ PP-70 of Chinese mugwort Dicon A/S (Asahi Denka Co., Ltd.) manufacture etc.) etc..

As nonionic system reactive emulsifier, for example, can enumerate：Alkyl ether system is (as commercially available product, for example, Ai Di アデカリアソープ ER-10, ER-20, ER-30, ER-40 of company of section (Asahi Denka Co., Ltd.) manufacture, flower king's strain ラテ system Le PD-420, PD-430, PD-450 of the manufacture of formula commercial firm etc.)；Alkyl phenyl ether system or alkyl phenyl ester system (as Commercially available product, for example, the ア Network アロ Application RN-10 of Di-ichi Kogyo Seiyaku Co., Ltd. (the first Gong Yesystemyao Co., Ltd.) manufacture, RN-20, RN-30, RN-50, the アデカリアソープ NE-10 of Chinese mugwort Dicon A/S (Asahi Denka Co., Ltd.) manufacture, NE-20, NE-30, NE-40 etc.)；(methyl) acrylate sulfuric ester system is (as commercially available product, for example, Japanese emulsifying agent strain formula RMA-564, RMA-568, RMA-1114 of commercial firm's manufacture etc.) etc..

, can be as needed when obtaining the crosslinked resin particulate in (methyl) acrylic emulsion by emulsion polymerization By the non-reacted emulsifying agent without ethene unsaturated group and the foregoing reactive emulsifier with ethene unsaturated group It is used in combination together.Non-reacted emulsifying agent, can substantially divide into non-reactive anion system emulsifying agent and non-reacted nonionic system Emulsifying agent.

As the example of non-reacted nonionic system emulsifying agent, it can enumerate：Polyoxyethylene lauryl ether, polyoxyethylene are hard The polyoxyethylene alkyl ether class such as aliphatic radical ether；The polyoxyethylene phenyl such as NONIN HS 240, ethylene nonyl phenyl ether Ethers；The sorbitans such as Span-20, sorbitan monostearate, sorbitan trioleate Higher fatty acids esters；The polyoxyethylene sorbitol acid anhydride high-grade aliphatic ester such as polyoxyethylene sorbitan monolaurate Class；The polyoxyethylene higher fatty esters of gallic acid such as Vinlub 73, polyoxyethylene list hard acid ester；Monoolein, The senior fatty glyceride class such as glyceryl monostearate；PULLRONIC F68-block copolymer, polyoxyethylene hexichol Vinylation phenyl ether etc..

In addition, as the example of non-reactive anion system emulsifying agent, can enumerate：The higher fatty acid salts such as enuatrol Class；The alkylaryl sulfonates class such as neopelex；The alkyl sulfate salt such as NaLS；Polyethylene glycol oxide The polyoxyethylene alkyl ether sulfuric ester salt such as sodium laureth sulfate；The polyoxyethylene alkane such as ethylene nonyl phenyl ether sodium sulphate Base aryl ether sulfuric ester salt；Single octyl group sodium sulfosuccinate, dioctyl sodium sulphosuccinate, polyoxyethylene laural base sulfo group amber The alkyl sulfosuccinates such as Meticortene Solu-Delta-cortef salt and its derivative species；Distyrenated phenyl ether sulfuric ester salt of polyoxyethylene etc..

The usage amount of emulsifying agent, is not necessarily the amount of circumscribed, can be used as final glue according to crosslinked resin particulate Required physical property is suitably selected during mixture.For example, relative to total 100 weight of ethylene unsaturated monomer Part, it is usually preferred to emulsifying agent is 0.1~30 parts by weight, more preferably more preferably 0.3~20 parts by weight, 0.5~10 weight Measure in the range of part.

In emulsion polymerization, Water soluble protective colloids and can be also used.As Water soluble protective colloids, for example, can lift Go out：The polyvinyl alcohols such as partly-hydrolysed polyvinyl alcohol, fully saponified polyvinyl alcohol, modified polyvinylalcohol；Hydroxy ethyl fiber The cellulose derivatives such as element, hydroxypropyl cellulose, carboxymethyl cellulose salt；Natural polysaecharides such as guar gum etc..Can to them Utilized in the way of independent or multiple combinations.Often add up to the ethylene unsaturated monomer of 100 parts by weight, be used as water solubility guarantor The usage amount for protecting colloid is 0.1~5 parts by weight, more preferably 0.5~2 parts by weight.

As aqueous medium, water can be enumerated, can also use hydrophily organic not damaging in the range of the object of the invention Solvent.

It is not special as long as the polymerization initiator with the ability for triggering radical polymerization as polymerization initiator Other limitation, can use known oil-soluble polymerization initiator, water-soluble polymerization initiator.

As oil-soluble polymerization initiator, it is not particularly limited, for example, benzoyl peroxide, peroxidating can be enumerated T-butyl perbenzoate, TBHP, peroxidating (2 ethyl hexanoic acid) tert-butyl ester, peroxidating -3,5,5- trimethyls oneself The organic peroxides such as tert-butyl acrylate, di-tert-butyl peroxide；2,2 '-azobis isobutyronitrile, 2,2 '-azo double -2, 4- methyl pentane nitriles, 2,2 '-azo double (4- methoxyl group -2,4- methyl pentane nitriles), 1,1 '-azo bis cyclohexane - Double compounds of the azos such as 1- nitriles etc..It can use a kind of or mixing is two or more to use them.These polymerization initiators, phase For 100 parts by weight of ethylene unsaturated monomers, the amount of 0.1~10.0 parts by weight is preferably used.

In the present invention, water-soluble polymerization initiator is preferably used, for instance, it may be preferable to use ammonium persulfate, potassium peroxydisulfate, mistake The previously known initiators such as double (the 2- methyl-props amidine) dihydrochlorides of hydrogen oxide, 2,2'- azos.In addition, gathering carrying out emulsion During conjunction, reducing agent can be used in combination together with polymerization initiator as needed.Thus, it can become prone to promote emulsion polymerization speed Or emulsion polymerization is carried out in low temperature.As this reducing agent, for example, ascorbic acid, arabo-ascorbic acid, winestone can be enumerated The reproducibility organic compound such as metal salt of acid, citric acid, glucose, formaldehyde sulfoxylates etc., sodium thiosulfate, sulfurous acid The reducing inorganic compound such as sodium, sodium hydrogensulfite, sodium pyrosulfite, frerrous chloride, rongalite, thiourea dioxide etc..These Reducing agent, relative to whole ethylene unsaturated monomers of 100 parts by weight, preferably uses the amount of 0.05~5.0 parts by weight.

Even if in addition, without using aforementioned polymeric initiator, can also implement to gather by photochemical reaction, radioactive ray irradiation etc. Close.Polymerization temperature is set to be more than the polymerization initiation temperature of each polymerization initiator.For example, in peroxide system polymerization initiator In the case of, as long as generally 70 DEG C or so.Polymerization time is not particularly limited, usually 2~24 hours.

Further, as needed, it can use in right amount：It is used as the sodium acetate, sodium citrate, sodium acid carbonate of buffer Deng, also have as the octyl mercaptan of chain-transferring agent, 2-ethylhexyl mercaptoacetate, TGA octyl group ester, stearyl mercaptan, The thio-alcohols such as lauryl mercaptan, tert-dodecylmercaotan.

There is acid functional when having used carboxylic ethylene unsaturated monomer etc. in the polymerization of crosslinked resin particulate Group monomer when, can before polymerization, polymerization after neutralized using alkali compounds.When neutralizing, it can be entered using following alkali Row is neutralized：The alkyl amine such as ammonia or trimethylamine, triethylamine, butylamine；2- dianols, diethanol amine, triethanolamine, ammonia first The alcamines such as base propyl alcohol；Morpholine etc..Wherein, in terms of drying property effect it is high be the high alkali of volatility, alkali preferably is ammonia first Base propyl alcohol, ammonia.

(glass transition temperature)

It is preferred that the glass transition temperature (below, also referred to as Tg) of crosslinked resin particulate is -50~70 DEG C, more preferably For -30~30 DEG C.If Tg is less than -50 DEG C, adhesive can excessively cover electrode active material, impedance and easily uprise.In addition, If Tg is more than 70 DEG C, the flexibility of adhesive, caking property can become not enough sometimes, and conductive carbon material is to current-collecting member Cementability, the mouldability of basalis are deteriorated.In addition, glass transition temperature is obtained using DSC (differential scanning calorimeter) Value.

, can be real in the following way based on the measure of DSC (differential scanning calorimeter) glass transition temperatures carried out Apply.Weighed in aluminium dish about 2mg through resin obtained from dry solidification crosslinked resin particulate, the test chamber is assemblied in DSC is determined on retainer, reads the endothermic peak of the chart obtained under 10 DEG C/min of Elevated Temperature Conditions.By peak value temperature now Degree is used as glass transition temperature.

(particle structure)

In addition, the particle structure of crosslinked resin particulate, also may be set to sandwich construction, that is, it is set as so-called nucleocapsid grain Son.For example, locally lain in by the resin for making to be polymerized based on the monomer with functional group in core portion or shell portion, or Person sets difference according to core and shell on Tg, composition, thus, it is possible to improve hardening, drying property, film forming, adhesive machinery Intensity.

(particle diameter)

Caking property from electrode active material, from the viewpoint of the stability of particle, preferably crosslinked resin particulate is flat Equal particle diameter is 10~500nm, more preferably 30~300nm.If in addition, can largely be damaged containing the oversize grain for having more than 1 μm The stability of particle, it is therefore preferable that the oversize grain more than 1 μm is at most below 5% weight.In addition, the average grain diameter is Volume average particle size is represented, can be measured using dynamic light scattering method.

Above-mentioned (methyl) acrylic emulsion, also contains from by uncrosslinked preferably in addition to containing crosslinked resin particulate The compound containing epoxy radicals, the compound of uncrosslinked amide-containing, the compound of uncrosslinked hydroxyl and uncrosslinked [token is at least one uncrosslinked compound (E) selected in the group that the compound of Han oxazolinyls is constituted sometimes below Compound (E)].Compound (E) is the scattered compound without being dissolved in aqueous solution shape medium.

As so-called " the uncrosslinked compound containing functional group " of compound (E), and as contained in monomer group (C1) The compound that monomer forms the internal cross-linked structure (three-D cross-linked structure) of (methyl) acrylic emulsion like that is different, but What finger was added after resin particle to be carried out to emulsion polymerization (formation polymer) (has neither part nor lot in the inside friendship to form resin particle Connection) compound.That is, the internal cross-linked structure (three for being meant that have neither part nor lot in (methyl) acrylic emulsions of so-called " uncrosslinked " Dimension cross-linked structure) formation.

(methyl) acrylic emulsion ensures electrolyte resistance by obtaining cross-linked structure, in addition, by using chemical combination Epoxy radicals, amide groups, Qiang Ji are selected from He at least one of oxazolinyl functional group can help in thing (E), compound (E) Cohesive between collector or electrode.And then, by adjusting cross-linked structure, the amount of functional group, result in electric power storage Excellent conductive composition in terms of the durability of device.

In addition, the crosslinked resin particulate in (methyl) acrylic emulsion needs to be in cross-linked state in inside particles. Pass through the crosslinking of appropriateness adjustment inside particles, it can be ensured that electrolyte resistance.Also, by the crosslinked resin containing functional group Added in particulate from by the uncrosslinked compound containing epoxy radicals, the compound of uncrosslinked amide-containing, uncrosslinked contain hydroxyl At least one uncrosslinked chemical combination selected in the group that the compound of base and the compound of uncrosslinked Han oxazolinyls are constituted Thing (E), can make epoxy radicals, amide groups, hydroxyl Huo oxazolinyls act on collector, can effectively improve with collector, Cohesive between electrode.The above-mentioned functional group contained in compound (E), due in long-term preserve, prepare electrode when heat It is also stable under effect, therefore, even if using on a small quantity, the cohesive effect to collector is also big.And then in storage stability Aspect is also excellent.Flexible, electrolyte resistance purpose based on adjustment adhesive, can also make compound (E) and crosslinked resin Functional group in particulate reacts, still, in order to the functional group reactionses in the crosslinked resin particulate containing functional group and mistake When degree uses the functional group in compound (E), the functional group that can be interacted with collector or electrode can be caused to reduce.Therefore, The reaction between crosslinked resin particulate and compound (E) in (methyl) acrylic emulsion is, it is necessary to collector or electricity Carried out in the not hurtful degree of the cohesive of pole.In addition, when the part use for the above-mentioned functional group contained in compound (E) When cross-linking reaction [when compound (E) is polyfunctional compound], by adjusting the crosslinking degree of these functional groups, it can obtain The balance of electrolyte resistance and cohesive.

As the uncrosslinked compound containing epoxy radicals, for example, can enumerate：(methyl) glycidyl acrylate, (first Base) ethylene unsaturated monomer containing epoxy radicals such as acrylic acid 3,4- epoxycyclohexyethylSiOi esters；By including the foregoing second containing epoxy radicals The radical polymerization syzygy resin that ethylene unsaturated monomer including alkene unsaturated monomer is polymerize and obtained；Ethylene glycol two Glycidol ether, polyethyleneglycol diglycidylether, glycerin diglycidyl ether, glycerin triglycidyl ether, 1,6- oneself Hexanediol diglycidyl ether, trihydroxymethylpropanyltri diglycidyl ether, diglycidylaniline, N, N, N', N'- tetra- shrink Multi-functional epoxy's chemical combination such as double (N, the N'- diglycidyl aminomethyl) hexamethylenes of glyceryl MXDP, 1,3- Thing；Epoxy system resins such as bisphenolA-epichlorohydrin type epoxy resin, Bisphenol F-epoxychloropropane type epoxy resin etc..

In the compound containing epoxy radicals, particularly preferably：BisphenolA-epichlorohydrin type epoxy resin, Bisphenol F-epoxy Epoxy system resins such as chloropropane type epoxy resin and by the ethene including the ethylene unsaturated monomer containing epoxy radicals The radical polymerization syzygy resin that unsaturated monomer is polymerize and obtained.For epoxy system resin, by with bisphenol backbone To improve electrolyte resistance, also, the hydroxyl by containing in skeleton, it is expected to reach the collaboration effect for improving collector cohesive Really.In addition, for the ethylene unsaturated monomer including the ethylene unsaturated monomer containing epoxy radicals is polymerize and For the radical polymerization syzygy resin of acquisition, by improving the bonding of collector with more epoxy radicals in resin matrix Property, also, due to being resin, it is expected to reach the effect than improving electrolyte resistance with single phase.

As the compound of uncrosslinked amide-containing, for example, can enumerate：(methyl) acrylamide etc. contains primary amide The compound of base；N hydroxymethyl acrylamide, N, N- bis- (methylol) acrylamide, N- methylol-N- methoxies (methyl) acrylamide etc. silane alcohol base (methyl) acrylamide based compound；N- methoxies-(methyl) acrylamide, N- ethoxyl methyls-(methyl) acrylamide, N- propoxy methyls-(methyl) acrylamide, N- butoxymethyls- (methyl) acrylamide, N- amoxys methyl-(methyl) acrylamide etc. monoalkoxy (methyl) acrylamide based compound； N, N- bis- (methoxy) acrylamide, N- ethoxyl methyl-N- methoxy methyls butylmethacrylamide, N, N- bis- (ethoxyl methyl) acrylamide, N- ethoxyl methyl-N- propoxy methyls Methacrylamide, the N, (propoxyl group of N- bis- Methyl) acrylamide, N- butoxymethyls-N- (propoxy methyl) Methacrylamide, N, N- bis- (butoxymethyl) Acrylamide, N- butoxymethyls-N- (methoxy) Methacrylamide, N, N- bis- (amoxy methyl) acryloyl Dialkoxy (methyl) the acrylamide chemical combination such as amine, N- methoxies-N- (amoxy methyl) Methacrylamide Thing；N, N- dimethylaminopropylacryl acid amides, N, the dialkyl amido (methyl) such as N- diethyl amino propyl acrylamides Acrylamide based compound；N, N- DMAA, N, dialkyl group (methyl) acryloyl such as N- acrylamides Amine compound；(methyl) acrylamide based compounds of ketone group containing such as diacetone (methyl) acrylamide etc., more than contain acyl The ethylene unsaturated monomer of amido；Ethene including the ethylene unsaturated monomer of foregoing amide-containing is unsaturated Radical polymerization syzygy resin that monomer is polymerize and obtained etc..

It is particularly preferably that the ethene of the amide-containing such as including acrylamide is unsaturated in the compound of amide-containing The radical polymerization syzygy resin that ethylene unsaturated monomer including monomer is polymerize and obtained.By having in resin matrix There are more amide groups to improve the cohesive of collector, also, due to being resin, it is expected to reach with single phase than improving resistance to electricity Solve the effect of fluidity.

As the compound of uncrosslinked hydroxyl, for example, can enumerate：(methyl) acrylic acid 2- hydroxyl ethyl esters, (methyl) Acrylic acid 2- hydroxypropyl acrylates, (methyl) acrylic acid 4- hydroxy butyl esters, glycerine list (methyl) acrylate, 4- hydroxyvinyls benzene, The ethylene unsaturated monomer of the hydroxyls such as 1- acetenyl -1- cyclohexanol, allyl alcohol；The ethene of foregoing hydroxyl will be included The radical polymerization syzygy resin that ethylene unsaturated monomer including property unsaturated monomer is polymerize and obtained；Ethylene glycol, two The straight chain aliphatic diols classes such as ethylene glycol, 1,3- propane diols, 1,4- butanediols, 1,5- pentanediols, 1,6-HD；The third two Alcohol, neopentyl glycol, 3- methyl isophthalic acids, the branched aliphatic glycols such as 5- pentanediols, 2,2- diethyl -1,3- propane diols； Cyclic diols classes such as double (methylol) hexamethylenes of 1,4- etc..

In the compound of hydroxyl, particularly preferably by the ethene including the ethylene unsaturated monomer of hydroxyl Radical polymerization syzygy resin or cyclic diols class that property unsaturated monomer is polymerize and obtained.For by including hydroxyl For the radical polymerization syzygy resin that ethylene unsaturated monomer including ethylene unsaturated monomer is polymerize and obtained, lead to Cross has more hydroxyls to improve the cohesive of collector in resin matrix, also, due to being resin, it is expected to reach and list Effect of the body phase than improving electrolyte resistance.In addition, cyclic diols class, by having cyclic structure in skeleton, it is expected to reach Improve the effect of electrolyte resistance.

As the compound of uncrosslinked Han oxazolinyls, for example, can enumerate：2 '-di-2-ethylhexylphosphine oxide (2- oxazolines), 2,2 '-ethylenebis (2- oxazolines), 2,2 '-ethylenebis (4- methyl -2- oxazolines), 2,2 '-propylidene are double (2- oxazolines), 2,2 '-tetramethylene double (2- oxazolines), 2,2 '-hexamethylene bis (2- oxazolines), 2,2 '-eight Di-2-ethylhexylphosphine oxide (2- oxazolines), 2,2 '-TOPOT 2,2′ p phenylenebis (2- oxazolines), 2,2 '-TOPOT 2,2′ p phenylenebis (4,4 '-diformazan Base -2- oxazolines), 2,2 '-TOPOT 2,2′ p phenylenebis (4- methyl -2- oxazolines), 2,2 '-TOPOT 2,2′ p phenylenebis (4- benzene Base -2- oxazolines), 2,2 '-metaphenylene double (2- oxazolines), the double (4- methyl -2- oxazoles of 2,2 '-metaphenylene Quinoline), 2,2 '-metaphenylene double (4,4 '-dimethyl -2- oxazolines), 2,2 '-metaphenylene it is double (4- phenylenes are double - 2- oxazolines), 2,2 '-adjacent phenylene double (2- oxazolines), 2,2 '-adjacent phenylene double (4- methyl -2- oxazolines), 2,2 '-bis- (2- oxazolines), 2,2 '-bis- (4- methyl -2- oxazolines), 2,2 '-bis- (4- ethyl -2- oxazoles Quinoline), 2,2 '-bis- (4- phenyl -2- oxazolines) and the radical polymerization syzygy resin containing oxazolinyl etc..

In the compound of Han oxazolinyls, particularly preferably the phenylene such as 2'- TOPOT 2,2′ p phenylenebis (2- oxazolines) is double Xing oxazoline compounds or the ethylene unsaturated monomer including the ethylene unsaturated monomer of Han oxazolinyls is entered The radical polymerization syzygy resin that row polymerize and obtained.Phenylene Shuan Xing oxazoline compounds, by having phenyl, tool in skeleton It is improved the effect of electrolyte resistance.In addition, for by the ethene including the ethylene unsaturated monomer of Han oxazolinyls Property the unsaturated monomer radical polymerization syzygy resin that is polymerize and obtained for, by having more Evil in resin matrix Oxazoline base can improve electrolyte resistance to improve the cohesive of collector, also, due to being resin with single phase ratio.

<Addition, the molecular weight of compound (E)>

Relative to the solid component content of 100 parts by weight crosslinked resin particulates, compound (E) 0.1~50 is preferably added Parts by weight, more preferably add 5~40 parts by weight.If the addition of compound (E) is less than 0.1 parts by weight, contribute to collector The amount of the functional group of cohesive is reduced, and can not make abundant contribution to the cohesive for improving collector sometimes.If in addition, more than 50 Parts by weight, then compound (E) can spill etc. into electrolyte and produce harmful effect to binder performance sometimes.Also, to chemical combination Thing (E) can and with two or more.

For compound (E) molecular weight, be not particularly limited, but preferable weight-average molecular weight be 1000~ 1000000, more preferably 5000~500000.If weight average molecular weight is less than 1000, sometimes to the cohesive effect of collector It is insufficient；In addition, if weight average molecular weight is more than 1000000, the viscosity of compound can be uprised sometimes, have behaviour when preparing electrode The situation that the property made is deteriorated.In addition, above-mentioned weight average molecular weight is to be changed based on what gel permeation chromatography (GPC) method was determined with polystyrene The value of calculation.

As aqueous liquid medium (D), water is preferably used, but as needed for example in order to improve the coating to collector Property, liquid medium compatible with water can also be used.As liquid medium compatible with water, it can enumerate：Alcohols, glycols, Dioxane, alkamine, amine, ketone, carboxylic acyloxy amine, phosphoamide class, sulfoxide type, carboxylic acid esters, phosphoric acid ester, ether Class, nitrile etc..Also, it can be used in scope compatible with water.

Also, as needed, can coordinate in conductive composition coalescents, defoamer, levelling agent, preservative, PH adjusting agent, viscous regulator etc..

In addition, conductive composition can act as the formation of the basalis of electrode for power storage device, therefore, stored based on suppression The purpose of the charge and discharge cycles deterioration of electric installation, can also add a kind of be directed to and be given birth to by the impurity in electrode with electrolyte reaction Into the acid material that is adsorbed or consumed.

As for reacting the material that generated acid is adsorbed by electrolyte, it is not particularly limited, for example, can To enumerate magnesia (MgO), aluminum oxide (Al₂O₃), boron oxide (B₂O₃), gallium oxide (Ga₂O₃) and indium oxide (In₂O₃) etc..

As for reacting the material that generated acid is consumed by electrolyte, as long as without spy without corroding collector It is other to limit, for example, can enumerate：The metal carbonate salt such as magnesium carbonate, calcium carbonate, carboxylic acid sodium, carboxylic acid potassium, sodium sulfonate, sulfonic acid The metal organic acid salt such as potassium, sodium benzoate, Potassium Benzoate, the silicon such as sodium metasilicate, potassium silicate, alumina silicate, magnesium silicate, silica Barbiturates, the alkaline hydrated oxide class such as magnesium hydroxide.

Also, when being used to be formed the basalis of electrode for power storage device by conductive composition, filled based on electric power storage is suppressed The purpose of the thermal runaway (thermal runaway) in overcharge or generation short circuit is put, can add and reach set point of temperature The material that the material of gas, the temperature coefficient of resistance are positive numbers is just produced during the above.

The material that gas is just produced when more than set point of temperature as reaching, for example, can enumerate：Lithium carbonate, zinc carbonate, carbon The carbonates such as lead plumbate, strontium carbonate, expanded graphite etc..

In addition, being the material of positive number as the temperature coefficient of resistance, ptc material and polymer PTC material can be enumerated. The material that its resistance just increased dramatically when ptc material refers to exceed its Curie temperature, for example, BaTiMO can be enumerated₂(M be from Any element above selected in Cr, Pb, Ca, Sr, Ce, Mn, La, Mn, Y, Nb and Nd).

The polymer PTC material refers to increase the material of resistance using high molecular Volume Changes under heat effect, Under low temperature condition, conductive path is formed with based on conductive carbon material (A), thus electric current flowing can be made, but when reaching a high temperature, it is high Molecule expands or shrinks to block conductive path, increases resistance.It is used as this polymer PTC material, Ke Yiju Go out：Polyethylene, polypropylene, polyethylene terephthalate, polyethers nitrile, polyimides, polyamide, polytetrafluoroethylene (PTFE), benzene second Alkene-butadiene rubber, polyacrylonitrile, PMA, polymethyl methacrylate, polyvinyl chloride, Kynoar, ring Oxygen tree fat etc., also has their copolymer or mixture etc..

, can be scattered etc. using pigment as device used when obtaining conductive composition, composite described later ink In usually used dispersion machine, mixer.

For example, can enumerate：Dispersion machine (ディスパー), homogeneous mixer (ホモミキサー) or planetary-type mixer Blender classes such as (プラネタリーミキサー)；Admire fondly " the Network レアミッ of scientific ＆ technical corporation (エ system テクニック societies) manufacture Network ス " or " Off ィ Le ミッ Network ス " etc. homogenizer (the ホモジ Na イザ of Pu Laimi Ces Co., Ltd (PRIMIX societies) manufacture ー) class；Mould wash mixer (ペイ Application ト U Application ディショ Na ー) (Rider company (レッドデビル societies) manufacture), ball mill, Sand mill (" the wearing promise grinding machine (ダイノミ Le) " of Xin Wan companies (シ Application マ Le エ Application タープライゼス societies) manufacture etc.), Vertical ball mill (アトライター), iron shot grinder (パー Le ミ Le) be (Ai Lixu companies (アイリッヒ societies) manufacture " DCP ミ Le " etc.) or ball mill (コボー Le ミ Le altogether) etc. medium dispersion machine；Wet shotcrete technology formula grinding machine (Ji Nasu companies " the ジー Na ス PY ", " the スターバー of Shan Ye Mechanology Inc. (スギノマシ Application society) manufacture of (ジー Na ス societies) manufacture スト ", nanometer blender company (Na ノマイザー societies) manufacture " Na ノマイザー " etc.), admire fondly scientific ＆ technical corporation (エ System テクニック societies) manufacture " Network レア SS-5 " or " MICROS " etc. of the manufacture of nara machinery society are without medium dispersion machine； Or, other ring-roller mills etc..But it is not limited to these.Also, as dispersion machine, preferably use be applied with prevent metal from The dispersion machine for the processing that dispersion machine is mixed into.

For example, when using medium dispersion machine, it is preferred to use agitator and container are ceramics system or resinous scattered The method of machine, or disperseed using the processing such as tungsten carbide spraying or resin coating is imposed to metal agitator and vessel surface The method of machine.Also, as medium, preferably use the ceramic beads such as bead or zirconium oxide bead or alumina bead.Also, work as During using ring-roller mill, it is also preferred that using ceramics roller processed.For dispersal device, both only it can use a kind of device can also group Close and use a variety of devices.In addition, crackle or the positive active material or negative electrode active material of crushing easily occur for particle under thump In the case of matter, compared with medium dispersion machine, preferably ring-roller mill, homogenizer etc. are without medium dispersion machine.

<Collector, electrode for power storage device of the electrical storage device with basalis>

The electrical storage device use with basalis collector, refer on the current collector have formed by conductive composition Basalis collector.In addition, the electrode for power storage device, including：Formed on the current collector by conductive composition Basalis and by answering that the composition for electrode formation (composite ink) containing electrode active material and adhesive is formed Condensation material layer.

Material, shape to the collector for electrode are not particularly limited, and can suitably select to be suitable to various store Material that electric installation is used, shape.For example, as the material of collector, the metals such as aluminium, copper, nickel, titanium or stainless steel can be enumerated Or alloy.In the case of li-ion batteries, especially, respectively, it is preferably aluminium as positive electrode, it is excellent as negative material Elect copper as.Also, as shape, usually using flat paper tinsel, it can also use the shape, with holes being roughened to surface Foil-like and cancellous collector.

As by conductive composition, the method for composite described later ink coating on the current collector, do not have special Limitation, can use known method.Specifically, can enumerate molding rubbing method (die coating), Dipcoat method, Print roll coating method, blade coating (doctor coating) method, blade coating (knife coating) method, spraying process, intaglio plate coating Method, silk screen print method or electrostatic applications method etc.；As drying means, it can be done using seasoning, blast drier, warm wind is placed Dry machine, infrared heater, FAR INFRARED HEATING machine etc., but these are not confined to especially.

Also, calendering process can also be carried out using lithographic plate forcing press or stack etc. after coating.It is used as basalis Thickness, usually more than 0.1 μm and less than 5 μm, preferably more than 0.1 μm and less than 2 μm.It is used as the thickness of electrode composite material layer Degree, usually more than 1 μm and less than 500 μm, preferably more than 10 μm and less than 300 μm.

As previously described, for the composite of common electrical storage device ink, active material and solvent be it is required, Conductive auxiliary agent and adhesive can be contained as needed.

It is preferred that as often as possible containing active material, for example, it is preferable to which active material accounts for the black solid component content of composite Ratio is more than 80 weight % and below 99 weight %.When containing conductive auxiliary agent, preferably conductive auxiliary agent accounts for composite ink admittedly The ratio of body component content is 0.1~15 weight %.When containing adhesive, preferably adhesive accounts for the black solid constituent of composite The ratio of content is 0.1~15 weight %.

Although different because of coating method, in the range of solid component content is 30~90 weight %, preferably set multiple The viscosity of condensation material ink is more than 100mPas and below 30000mPas.

Below, the active material used in composite ink is illustrated.

As the positive active material of lithium rechargeable battery, be not particularly limited, can use can adulterate or The metallic compounds and electroconductive polymer etc. such as metal oxide, the metal sulfide of embedded lithium ion.

For example, the oxide of Fe, Co, Ni, Mn etc. transition metal, the composite oxides with lithium, transition gold can be enumerated Belong to inorganic compounds such as sulfide etc..Specifically, it can enumerate：MnO、V₂O₅、V₆O₁₃、TiO₂Deng transition metal oxide powder End；Lithium nickelate, cobalt acid lithium, the LiMn2O4 of layer structure；The lithium of the LiMn2O4 of spinel structure etc. and the composite oxygen of transition metal Compound powder；It is used as the LiFePO4 based material of the phosphate cpd of olivine structural；TiS₂, the transient metal sulfide such as FeS Powder etc..

In addition, can also use the electroconductive polymers such as polyaniline, polyacetylene, polypyrrole, polythiophene.In addition, can will be upper State after inorganic compound, organic compound are mixed and use.

As the negative electrode active material of lithium rechargeable battery, as long as it can adulterate or be embedded in the negative electrode active of lithium ion Material, there is no particular limitation.For example, can enumerate：Metal Li, tin alloy, silicon alloy, metal as its alloy Deng alloy system；Li_XFe₂O₃、Li_XFe₃O₄、Li_XWO₂, lithium titanate, lithium vanadate, the metal oxide system such as lithium metasilicate；It is polyacetylene, poly- To electroconductive polymer systems such as phenylenes (poly-p-phenylene)；The amorphous carbonaceous material such as soft carbon or hard carbon, high graphite Change carbonaceous powder, carbon black, interphase carbon black (the Mesophase carbon such as the Delanium or native graphite of carbon material etc. Black), the carbon-based material such as resin calcining carbon material, gas-phase growth of carbon fibre, carbon fiber.These negative electrode active materials, can either It can be also applied in combination using one kind a variety of.

For the size of these electrode active materials, in the range of preferably 0.05~100 μm, more preferably 0.1~ In the range of 50 μm.Also, the dispersion particle diameter of the electrode active material (A) in preferred composite materials ink is 0.5~20 μm.Herein Described dispersion particle diameter, refer in volume particle size distribution from the volume ratio of its accumulative particle of the small particle of particle diameter when reach To the particle diameter (D50) when 50%.The particle diameter is measured using common particles distribution instrument, is e.g. dissipated using dynamic optical Particles distribution instrument (" マイ Network ロトラッ Network UPA " (trade name), Ji Zhuan companies (day Machine fill society) manufacture) of formula etc. is penetrated to enter What row was determined.

As the electrode active material of double layer capacitor, be not particularly limited, can enumerate activated carbon, it is many simultaneously Benzene, carbon whisker and graphite etc., it is possible to enumerate their powder or fiber etc..The preferred electrode activity of double layer capacitor Material is activated carbon, specifically, can be enumerated phenol system, coconut husk system, artificial silk system, acrylic acid series, coal/petroleum pitch coke Charcoal, carbonaceous mesophase spherules (MCMB) etc. carry out the activated carbon of activation.It is preferred that can also be formed in the case of weight identical The big activated carbon of the specific surface area at the interface of broader area.Specifically, specific surface area is generally 30m²/ more than g, be preferably 500~5000m²/ g, more preferably 1000~3000m²/g.These electrode active materials, can be used alone or combine two kinds It is used above, average grain diameter or the different two or more carbon of size distribution can be applied in combination.

As the positive active material of lithium-ion capacitor, as long as it can reversibly carry out lithium ion and anion The material of doping/dedoping is just not particularly limited, for example, active carbon powder can be enumerated.It is preferred that the dispersion particle diameter of activated carbon For 0.1 μm~20 μm.Dispersion particle diameter described herein is as described above.

As the negative electrode active material of lithium-ion capacitor, as long as it can reversibly carry out the doping of lithium ion/de- Just there is no particular limitation for the material of doping, for example, the graphite based material such as Delanium, native graphite can be enumerated.It is preferred that living Property charcoal dispersion particle diameter be 0.1 μm~20 μm.Dispersion particle diameter described herein is as described above.

The conductive auxiliary agent in composite ink, as long as just there is no particular limitation for conductive carbon material, energy It is enough to use and above-mentioned conductive carbon material (A) identical material.

Described adhesive in composite ink, is for making the particle of active material, conductive carbon material etc. mutual Or the adhesive bonded between conductive carbon material and collector.

As the adhesive used in composite ink, for example, can enumerate：Acrylic resin, polyurethane resin, polyester Resin, phenolic resin, epoxy resin, phenoxy resin, urea resin, melmac, alkyd resin, formaldehyde resin, silicon The synthetic rubber of the celluosic resins such as ketone resin, fluororesin, carboxymethyl cellulose, SBR styrene butadiene rubberses or fluorubber etc., Electroconductive resin such as polyaniline or polyacetylene etc., the high score containing fluorine atom such as Kynoar, polyvinyl fluoride and tetrafluoroethene Sub- compound.Also, it can also be the modifier, mixture or copolymer of these resins.These adhesives, can be used alone One kind, also can be combined a variety of use.

In addition, being used as the adhesive of adhesive, preferably aqueous medium suitable for aqueous composite ink；It is situated between as water The state of the adhesive of matter, can enumerate water-soluble type, emulsion-type, water-soluble glue-type state etc., and can suitably be selected.

Also, coalescents, defoamer, levelling agent, preservative, pH as needed, can be coordinated in composite ink Conditioning agent, viscous regulator etc..

By the way that conductive composition is coated with the current collector, dries and form basalis, result in electrical storage device use Collector with basalis.Or, by the way that conductive composition is coated with the current collector, dry and formed basalis and Composite layer is set on the basalis, electrode for power storage device is resulted in.It is arranged at the composite layer on basalis, energy Enough formed using above-mentioned composite ink.

At least one of negative or positive electrode is used into above-mentioned electrode, the electric power storages such as secondary cell, capacitor dress is resulted in Put.

As secondary cell, in addition to lithium rechargeable battery, sodium ion secondary battery, magnesium ion two can also be enumerated Primary cell, alkaline secondary battery, lead accumulator, sodium-sulfur secondary battery, lithium air secondary battery etc..Can suitably it use various two In primary cell since in the past known electrolyte, interval body etc..

As capacitor, double layer capacitor, lithium-ion capacitor etc. can be enumerated, can suitably be used in various electric capacity In device since in the past known electrolyte, interval body etc..

Illustrate electrolyte in case of lithium rechargeable battery.As electrolyte, using in non-water solvent It is dissolved with the electrolyte of the electrolyte containing lithium.

As electrolyte, LiBF can be enumerated₄、LiClO₄、LiPF₆、LiAsF₆、LiSbF₆、LiCF₃SO₃、Li(CF₃SO₂)₂N、LiC₄F₉SO₃、Li(CF₃SO₂)₃C、LiI、LiBr、LiCl、LiAlCl、LiHF₂, LiSCN or LiBPh₄Deng, but do not limit In this.

As the solvent of non-water system, it is not particularly limited, for example, can enumerate：Ethylene carbonate, propylene carbonate, The carbonates such as butylene carbonate, dimethyl carbonate, methyl ethyl carbonate and diethyl carbonate；Gamma-butyrolacton, gamma-valerolactone and The lactones such as γ-octalactone, tetrahydrofuran, 2- methyltetrahydrofurans, DOX, 4- methyl isophthalic acids, 3- dioxolanes, 1, The glycol dinitrate ethers such as 2- Ethyl Methyl Ethers, 1,2- Ethoxyethanes and 1,2- dibutoxy ethane；Methyl formate, acetic acid first The esters such as ester and methyl propionate；The sulfoxide type such as dimethyl sulfoxide and sulfolane, and the nitrile such as acetonitrile etc..Also, these solvents, both It can individually use, two or more use can also be mixed.

Formed further, it is possible to which above-mentioned electrolyte is maintained in polymeric matrix in gelatinous polyelectrolyte.Make For polymeric matrix, it can enumerate：Acrylic ester resin with polyoxyalkylene (polyalkylene oxide) segment, tool There are the poly phosphazene system resin of polyoxyalkylene segment and the polysiloxanes with polyoxyalkylene segment etc., but be not limited to this A bit.

As interval body, for example, polyethylene nonwoven, polypropylene non-woven fabric, polyamide non-woven fabrics and right can be enumerated They apply product obtained from hydrophily processing, but are not confined to these especially.

For lithium rechargeable battery, double layer capacitor, the structure of lithium-ion capacitor, it is not particularly limited, Generally it is made up of positive pole and negative pole and interval body set as needed, paper can be set as according to used purpose Type, cylinder type, coin shape, cascade type etc. are variously-shaped.

Embodiment

Below, the present invention is further elaborated with by embodiment, but the following examples are to the interest field of the present invention There is no any limitation.In addition, " part " expression " parts by weight " in embodiment and comparative example.

[synthesis example 1]

In equipped with agitator, thermometer, dropping funel, the reaction vessel of return channel, load 40 parts of ion exchange waters and It is used as 0.2 part of " アデカリアソープ SR-10 " (trade name, (Co., Ltd. of Chinese mugwort Dicon A/S of interfacial agent ADEKA) manufacture), and then addition has separately been pre-mixed 48.5 parts of methyl methacrylates, 50 parts of butyl acrylates, 1 part of propylene Acid, 0.5 part of 3- methacryloxypropyl trimethoxy silanes, 53 parts of ion exchange waters and 1.8 as interfacial agent Part " アデカリアソープ SR-10 " (trade name, Chinese mugwort Dicon A/S (Asahi Denka Co., Ltd.) manufacture) and prepare pre- breast Change 1% in liquid.After internal temperature is warming up into 70 DEG C and is sufficiently displaced from nitrogen, the 5% of 10 parts of potassium peroxydisulfates of addition The 10% of the aqueous solution, starts polymerization.By in reaction system 70 DEG C keep 5 minutes after, on one side holding internal temperature in 70 DEG C, one Continue to stir by the remainder of the remainder of pre-emulsion and 5% aqueous solution of potassium peroxydisulfate is added dropwise within 3 hours in side 2 hours.After confirming that conversion ratio has exceeded 98% by solid component content measure, temperature is cooled to 30 DEG C.Addition 25% ammoniacal liquor simultaneously adjusts pH for 8.5, and then adjusts solid component content to 40% with ion exchange water, so as to obtain resin Microparticle aqueous dispersions.In addition, solid component content is obtained according to residual volume is obtained within 20 minutes in 150 DEG C of sintering processes.

[Production Example 1]

Load 20 parts of isopropanols, 20 parts of water in equipped with agitator, thermometer, dropping funel, the reaction vessel of return channel, 40 parts of methyl methacrylates, 40 parts of methyl acrylates, 20 parts of GMAs are separately loaded into dropwise adding tank 1 In, and be fitted into dropwise adding tank 2 after 2 parts of potassium peroxydisulfates are dissolved in into 30 parts of isopropanols and 30 parts of water.Internal temperature is warming up to 80 DEG C and after being sufficiently displaced from nitrogen, dropwise adding tank 1,2 is added dropwise by 2 hours, polymerize.After completion of dropwise addition, Keep internal temperature persistently to be stirred in the state of 80 DEG C 1 hour, confirm that conversion ratio exceedes by solid component content measure After 98%, temperature is cooled to 30 DEG C, the compound (metering system containing epoxy radicals that solid component content is 40% is obtained Sour methyl esters/methyl acrylate/glycidyl methacrylate copolymer) solution.Exist in addition, solid component content is basis Residual volume that 150 DEG C of sintering processes are obtained for 20 minutes is obtained.

[Production Example 2]

Load 90 parts of water in equipped with agitator, thermometer, dropping funel, the reaction vessel of return channel, separately by 20 parts Acrylamide is fitted into dropwise adding tank 1, and is fitted into dropwise adding tank 2 after 2 parts of potassium peroxydisulfates are dissolved in into 90 parts of water.By internal temperature liter After temperature is sufficiently displaced to 80 DEG C and with nitrogen, dropwise adding tank 1,2 is added dropwise by 2 hours, polymerize.Knot is added dropwise Shu Hou, is keeping internal temperature persistently to be stirred in the state of 80 DEG C 1 hour, conversion is confirmed by solid component content measure After rate is more than 98%, temperature is cooled to 30 DEG C, the compound for obtaining the amide-containing that solid component content is 40% is (poly- Acrylamide) solution.In addition, solid component content is obtained according to the residual volume obtained for 20 minutes in 150 DEG C of sintering processes.

[Production Example 3]

Load 40 parts of water in equipped with agitator, thermometer, dropping funel, the reaction vessel of return channel, separately by 40 parts 2-EHA, 40 parts of styrene, 20 parts of DMAAs are fitted into dropwise adding tank 1, and by 2 parts of potassium peroxydisulfates It is fitted into after being dissolved in 60 parts of water in dropwise adding tank 2.

After internal temperature is warming up into 80 DEG C and is sufficiently displaced from nitrogen, dropwise adding tank 1,2 is dripped by 2 hours Plus, it is polymerize.After completion of dropwise addition, keep internal temperature persistently stirred in the state of 80 DEG C 1 hour, by solid into Divide assay that after confirming conversion ratio more than 98%, temperature is cooled into 30 DEG C, it is 40% to obtain solid component content Amide-containing compound (2-EHA/styrene/DMAA copolymer) solution.In addition, solid Body component content is obtained according to the residual volume obtained for 20 minutes in 150 DEG C of sintering processes.

[Production Example 4]

Load 20 parts of isopropanols, 20 parts of water in equipped with agitator, thermometer, dropping funel, the reaction vessel of return channel, Separately 40 parts of methyl methacrylates, 40 parts of butyl acrylates, 20 parts of HEMAs are fitted into dropwise adding tank 1, And be fitted into after 2 parts of potassium peroxydisulfates are dissolved in into 30 parts of isopropanols and 30 parts of water in dropwise adding tank 2.Internal temperature is warming up to 80 DEG C simultaneously After being sufficiently displaced from nitrogen, dropwise adding tank 1,2 is added dropwise by 2 hours, polymerize.After completion of dropwise addition, protecting Hold internal temperature persistently to stir in the state of 80 DEG C 1 hour, confirm that conversion ratio exceedes by solid component content measure After 98%, temperature is cooled to 30 DEG C, the compound (methacrylic acid for the hydroxyl that solid component content is 40% is obtained Methyl esters/butyl acrylate/HEMA copolymer) solution.In addition, solid component content is according at 150 DEG C Residual volume that sintering processes are obtained for 20 minutes is obtained.

[synthesis example 2~21]

It is combined into and is synthesized using the method same with synthesis example 1 according to matching somebody with somebody shown in table 5, table 6, table 11, obtains The aqueous resin microparticle dispersion of synthesis example 2~21.Wherein, aggegation occurs for the resin in emulsion polymerization of synthesis example 20,21, fails Enough obtain purpose resin particle.

(embodiment 1)

Using 10 parts of acetylene black (A-1 as conductive carbon material：デ Application カ Block ラッ Network (superconducting acetylene carbon black) HS- 100) aqueous solution of, 50 parts (being calculated as 10 parts using solid component content) as the polypropylene amine 20% of water-soluble resin adhesive (B-1), 16.7 parts (being calculated as 10 parts using solid component content) are used as the polytetrafluoroethylene (PTFE) of water-dispersed resin particulate binder 30-J (three fluorine chemistry companies of well Du Pont (three well デュ Port Application Off ロロケミカ Le societies) manufacture) 60% aqueous dispersion (C-1), 223.3 parts of water load is mixed in blender, and then loading sand mill is disperseed, and obtains electric conductivity combination Thing (1).According to the judgement (according to JIS K5600-2-5) carried out using particle size analyzer (Grind gauge), obtained by obtaining Dispersion decentralization.Evaluation result is shown in Table 1.Numeral in table represents the size of oversize grain, smaller point of numerical value Scattered property is more excellent, and it is uniform and good state to represent.

(2~embodiment of embodiment 6, embodiment 23, embodiment 24,1~comparative example of comparative example 6)

According to the ratio of components shown in table 1 and using the method that is same as conductive composition (1), obtain embodiment and Conductive composition (2)~(14) of comparative example.

Also, by the conductive composition (1), it is coated on using metering bar coater (bar coater) as collector On the aluminium foil of 20 μ m thicks, then it is thermally dried, electrical storage device is obtained with carrying in the way of thickness is turned into 1.2 μm The collector (1) of basalis.Adopt the solvent resistance that have rated the resulting collector with basalis in the following method.Separately Outside, the method that electrical storage device uses the collector (1) with basalis is same as according to the constituted mode described in table 2 and use, Electrical storage device is obtained with collector (2)~(28) with basalis and is similarly evaluated respectively.

(solvent resistance of the collector with basalis)

With the table of the collector with basalis of the above-mentioned preparation of cotton friction containing NMP (1-METHYLPYRROLIDONE) Face, have rated solvent resistance.When coating composite is black on the base layer, in order to which basalis is not broken, solvent resistance becomes Obtain critically important.Metewand is shown in following, and evaluation result is shown in Table 2.

○：" having no reduction (level having no problem in practical) "；

○△：" basalis is somewhat cut down and the visible attachment on cotton, do not expose collector surface (though deposit In problem but workable level) "；

△：" basalis is cut down, and collector surface is locally exposed "；

×：" basalis is completely peeled off ".

Table 2

Collector with basalis	Conductive composition	Collector	Solvent resistance
				(1)	(1)	Aluminium foil	○
(2)	(2)	Aluminium foil	○
				(3)	(3)	Aluminium foil	○△
(4)	(4)	Aluminium foil	○
				(5)	(5)	Aluminium foil	○
(6)	(6)	Aluminium foil	○
				(7)	(1)	Copper foil	○
(8)	(2)	Copper foil	○
				(9)	(3)	Copper foil	○△
(10)	(4)	Copper foil	○
				(11)	(5)	Copper foil	○
(12)	(6)	Copper foil	○
				(25)	(13)	Aluminium foil	○
(26)	(14)	Aluminium foil	○
				(27)	(13)	Copper foil	○
(28)	(14)	Copper foil	○
				(13)	(7)	Aluminium foil	×
(14)	(8)	Aluminium foil	△
				(15)	(9)	Aluminium foil	△
(16)	(10)	Aluminium foil	×
				(17)	(11)	Aluminium foil	△
(18)	(12)	Aluminium foil	△
				(19)	(7)	Copper foil	×
(20)	(8)	Copper foil	△
				(21)	(9)	Copper foil	△
(22)	(10)	Copper foil	×
				(23)	(11)	Copper foil	△
(24)	(12)	Copper foil	△

Using 44 parts of LiFePO as positive active material₄, 3 parts of conductive auxiliary agents (acetylene black), 3 parts of adhesives (PVDF), 50 parts of NMP (1-METHYLPYRROLIDONE) mixing, are prepared for composite material for positive electrode ink.

Using 46.5 parts of Delanium, 1 part of conductive auxiliary agent (acetylene black), 2.5 parts of adhesives as negative electrode active material (PVDF), 50 parts of NMP mixing, are prepared for negative pole composite ink.

By above-mentioned lithium ion secondary battery positive electrode composite ink, using scraper for coating in 20 μ m-thicks as collector On the aluminium foil of degree, heating under reduced pressure, drying are then carried out, is adjusted in the way of thickness of electrode is turned into 100 μm.And then, The calendering process based on roll-in is implemented, the positive pole that thickness is 85 μm is made.

[embodiment 11]

By above-mentioned lithium ion secondary battery positive electrode composite ink, used using scraper for coating in secondary cell and carry substrate On the collector (1) of layer, heating under reduced pressure, drying are then carried out, is adjusted in the way of thickness of electrode is turned into 100 μm. And then, the calendering process based on roll-in is implemented, the positive pole that thickness is 85 μm is made.Resulting electricity is have rated using following methods The cohesive of pole.Evaluation result is shown in Table 3.

[embodiment 12~16,25,26, comparative example 11~17]

In addition to the electrical storage device shown in using table 2 uses the electrode with basalis, enter similarly to Example 11 Row operation, obtains positive pole.And the evaluation of progress similarly to Example 11, evaluation result is shown in Table 3.

By above-mentioned lithium ion secondary battery negative pole composite ink, using scraper for coating in 20 μ m-thicks as collector On the copper foil of degree, heating under reduced pressure, drying are then carried out, is adjusted in the way of thickness of electrode is turned into 82 μm.And then, apply Calendering process of the row based on roll-in, is made the negative pole that thickness is 70 μm.

[embodiment 17]

By above-mentioned lithium ion secondary battery negative pole composite ink, used using scraper for coating in electrical storage device and carry substrate On the collector (7) of layer, heating under reduced pressure, drying are then carried out, is adjusted in the way of thickness of electrode is turned into 82 μm.Apply Calendering process of the row based on roll-in, is made the negative pole that thickness is 70 μm.The viscous of resulting electrode is have rated using following methods Conjunction property.Evaluation result is shown in Table 4.

[embodiment 18~22,27,28, comparative example 18~24]

In addition to the electrical storage device shown in using table 4 uses the collector with basalis, similarly to Example 17 Operated, obtain negative pole.And evaluation similarly to Example 17 has been carried out, evaluation result is shown in Table 4.

(cohesive of electrode)

Incision processing is carried out using cutter on the electrode of above-mentioned preparation, to be formed from electrode surface up to reaching collector Depth otch, and with the 2mm tessellated otch of presentation that direction in length and breadth forms 6 respectively that is spaced in.Splicing tape is glued Peeled off immediately after being affixed on the otch, the degree that comes off of electrode is judged by estimating judgement.Metewand is as follows.

○：" no to peel off (level having no problem in practical) "；

○△：" slightly having stripping (though there is problem but workable level) "；

△：" half or so stripping "；

×：" most of to peel off ".

Coin-shaped battery is prepared for, the Coin-shaped battery is by the positive pole and negative pole that are shown in table 3, table 4 are stamped into respectively 16mm diameters and the interval body (porous polypropylene film) inserted between them；And electrolyte (makes LiPF₆With the dense of 1M Degree is dissolved in 1:It is non-that the ratio mixed carbonic acid ethyl of 1 (volume ratio) and the in the mixed solvent of diethyl carbonate are obtained Aqueous electrolyte) constitute.Coin-shaped battery is prepared in the glove box replaced in argon gas, laggard preparing Coin-shaped battery Defined battery behavior evaluation is gone.Evaluation result is shown in table 3, table 4.

(charge/discharge cycle characteristics)

Charge and discharge electrical measurement is carried out to resulting Coin-shaped battery using charge and discharge device (SM-8, the manufacture of Big Dipper electrician society) It is fixed.

It is being that 4.0V carries out constant current constant voltage charging (cut-off by 1.0mA (0.2C), end of charge voltage of charging current Electric current 0.1mA) after, constant current discharge is carried out by 1.0mA of discharge current until reaching final discharging voltage 2.0V.Filled above-mentioned Electricity-discharge cycles repeat the chargings of 5 circulations, electric discharge as 1 circulation, and the discharge capacity that the 5th is circulated is as first Initial discharge capacity (is set on hold rate 100%) by discharge capacity.

Then, in 50 DEG C of thermostats, by 5.0mA of charging current, end of charge voltage be 4.0V carry out constant current After constant voltage charging (cut-off current 0.5mA), constant current discharge is carried out by 5.0mA of discharge current until reaching discharge off electricity Press 2.0V.Implement 200 charge and discharge cycles, obtaining the rate of change of discharge capacitance, (discharge capacity of the 200th time is relative In the percentage of initial discharge capacity) (better closer to 100%).

○：" rate of change is more than 90%.It is particularly excellent.”

○△：" rate of change is 85% less than 90%.Have no problem completely.”

△：" rate of change is 80% less than 85%.Though there is problem but workable level.”

×：" rate of change is less than 80%.There is problem in practical, it is impossible to use.”

The lithium rechargeable battery of table 3

The lithium rechargeable battery of table 4

Using 88 parts of activated carbon (specific surface area 1800m as active material²/ g), 5 parts of conductive auxiliary agents (acetylene black), 7 parts Adhesive (PVDF), 230 parts of NMP (1-METHYLPYRROLIDONE) mixing, are prepared for positive pole, negative pole composite ink.

By above-mentioned double layer capacitor composite ink, using scraper for coating in the aluminium of 20 μ m thicks as collector After on paper tinsel, carry out heating under reduced pressure, drying, then implement the calendering process based on roll-in, be prepared for thickness of electrode for 50 μm just Pole and negative pole.

[embodiment 29]

By above-mentioned electric double layer composite ink, using scraper for coating in collector of the electrical storage device with basalis (1) after on, carry out heating under reduced pressure, drying, then implement the calendering process based on roll-in, be prepared for thickness be 50 μm positive pole and Negative pole.The cohesive of resulting electrode is have rated using the above method.Evaluation result is shown in Table 7.

[embodiment 30~44, comparative example 25~38]

In addition to the electrical storage device shown in using table 7, table 8 uses the electrode with basalis, similarly to Example 29 Ground is operated, and obtains positive pole and negative pole.Evaluation result is shown in table 7, table 8.

Double layer capacitor is prepared for, the double layer capacitor is by the positive pole and negative pole that are shown in table 7, table 8 are rushed respectively Press as 16mm diameters and the interval body (porous polypropylene film) that inserts between them；And electrolyte (makes TEMABF₄(three second Ylmethyl ammonium tetrafluoroborate) non-aqueous electrolyte that is dissolved in 1M concentration in polypropylene carbonate ester solvent) constituted.Double electricity Layer capacitor is prepared in the glove box replaced in argon gas, and defined electrical characteristics have been carried out after double layer capacitor is prepared Evaluate.Evaluation result is shown in table 7, table 8.

(charge/discharge cycle characteristics)

Charge and discharge electrometric determination is carried out to resulting double layer capacitor using charge and discharge device.

Charging is carried out by 10C speed of charging current up to after end of charge voltage 2.0V, using discharge current as 10C speed Constant current discharge is carried out until reaching final discharging voltage 0V.Above-mentioned charge-discharge cycles are repeated 5 as 1 circulation Charging, the electric discharge of circulation, initial discharge capacity (is set on hold by the discharge capacity of the 5th circulation as initial discharge capacity Rate 100%).In addition, charging and discharging currents speed be using can with 1 hour by battery (cell) capacity discharge size of current as 1C。

Then, in 50 DEG C of thermostats, it is by 10C speed, end of charge voltage of charging current after 2.0V is charged, Constant current discharge is carried out by 10C speed of discharge current until reaching final discharging voltage 0V.Implement 500 discharge and recharges to follow Ring, obtains the rate of change (percentage of the discharge capacity relative to initial discharge capacity of the 500th time) of discharge capacitance (more It is better close to 100%).

○：" rate of change is more than 95%.It is particularly excellent.”

○△：" rate of change is 90% less than 85%.Have no problem completely.”

△：" rate of change is 85% less than 80%.Though there is problem but workable level.”

×：" rate of change is less than 85%.There is problem in practical, it is impossible to use.”

The double layer capacitor of table 7

The double layer capacitor of table 8

<Lithium-ion capacitor composite material for positive electrode ink>

Using 88 parts of activated carbon (specific surface area 1800m as active material²/ g), 5 parts of conductive auxiliary agents (acetylene black), 7 parts Adhesive (PVDF), 230 parts of NMP (1-METHYLPYRROLIDONE) mixing, are prepared for composite material for positive electrode ink.

<Lithium-ion capacitor negative pole composite ink>

Using 90 parts of graphite as negative electrode active material, 5 parts of conductive auxiliary agents (acetylene black), 5 parts of adhesives (PVDF), 200 Part NMP mixing, is prepared for negative pole composite ink.

<Lithium-ion capacitor without basalis is with positive pole (comparative example and evaluate with to electrode)>

By above-mentioned lithium-ion capacitor composite material for positive electrode ink, using scraper for coating in 20 μ m-thicks as collector On the aluminium foil of degree, heating under reduced pressure, drying are then carried out, is implemented after the calendering process based on roll-in, it is 60 μm to be prepared for thickness Positive pole.

<Lithium-ion capacitor positive pole with basalis>

[embodiment 45]

By above-mentioned lithium-ion capacitor composite material for positive electrode ink, used using scraper for coating in electrical storage device and carry substrate On the collector (1) of layer, heating under reduced pressure, drying are then carried out, is implemented after the calendering process based on roll-in, it is 60 to be prepared for thickness μm positive pole.The cohesive of resulting electrode is have rated using the above method.Evaluation result is shown in Table 9.

[embodiment 46~52, comparative example 39~45]

In addition to the electrical storage device shown in using table 9 uses the collector with basalis, in the same manner as embodiment 45 Operated, obtain positive pole.Evaluation result is shown in Table 9.

<Lithium-ion capacitor without basalis is with negative pole (comparative example and evaluate with to electrode)>

By above-mentioned lithium-ion capacitor negative pole composite ink, using scraper for coating in 20 μ m-thicks as collector On the copper foil of degree, heating under reduced pressure, drying are then carried out, is implemented after the calendering process based on roll-in, it is 45 μm to be prepared for thickness Negative pole.

<Lithium-ion capacitor negative pole with basalis>

[embodiment 53]

By above-mentioned lithium-ion capacitor negative pole composite ink, used using scraper for coating in electrical storage device and carry substrate On the collector (7) of layer, heating under reduced pressure, drying are then carried out, is implemented after the calendering process based on roll-in, it is 45 to be prepared for thickness μm negative pole.The cohesive of resulting electrode is have rated using the above method.Evaluation result is shown in Table 10.

[embodiment 54~60, comparative example 46~52]

In addition to the electrical storage device shown in using table 10 uses the collector with basalis, in the same manner as embodiment 53 Operated, obtain negative pole.Evaluation result is shown in Table 10.

<Lithium-ion capacitor>

Be prepared for lithium-ion capacitor, the lithium-ion capacitor by the positive pole that will be shown in table 9, table 10 and in advance with lithium from Son is applied with the interval body that the negative pole of half doping treatment is prepared and inserted between them with a diameter of 16mm size respectively (porous polypropylene film)；And electrolyte (makes LiPF₆It is dissolved in 1M concentration with 1:1:The ratio mixing carbon of 1 (volume ratio) The non-aqueous electrolyte that the in the mixed solvent of sour ethyl and dimethyl carbonate and diethyl carbonate is obtained) constitute.Lithium Half doping of ion, is by the way that interval body is clipped between negative pole and lithium metal and made in beaker unit (beaker cell) Lithium ion is to be about that the amount of capacity of negative plates half is doped in negative pole and carried out.In addition, lithium-ion capacitor is in argon gas Prepared in the glove box of displacement, defined electrical characteristics evaluation has been carried out after lithium-ion capacitor is prepared.By evaluation result It is shown in table 9, table 10.

(charge/discharge cycle characteristics)

Using charge and discharge device, charge and discharge electrometric determination has been carried out to resulting lithium-ion capacitor.

Charging is carried out by 10C speed of charging current up to after end of charge voltage 4.0V, using discharge current as 10C speed Constant current discharge is carried out until reaching final discharging voltage 2.0V.Above-mentioned charge-discharge cycles are repeated 5 as 1 circulation Initial discharge capacity, (is set to protect by charging, the electric discharge of individual circulation using the discharge capacity of the 5th circulation as initial discharge capacity Holdup 100%).

Then, in 50 DEG C of thermostats, it is by 10C speed, end of charge voltage of charging current after 4.0V is charged, Constant current discharge is carried out by 10C speed of discharge current until reaching final discharging voltage 2.0V.Implement 500 discharge and recharges to follow Ring, obtains the rate of change (percentage of the discharge capacity relative to initial discharge capacity of the 500th time) of discharge capacitance (more It is better close to 100%).

○：" rate of change is more than 95%.It is particularly excellent.”

○△：" rate of change is 90% less than 95%.Have no problem completely.”

△：" rate of change is 85% less than 90%.Though there is problem but workable level.”

The lithium-ion capacitor of table 9

The lithium-ion capacitor of table 10

As shown in table 3,4,7~10, in the case of the basalis formed using the conductive composition by the present invention, Defect will not be produced when composite ink is coated with basalis and negative or positive electrode is made, can significantly improve the viscous of electrode Conjunction property.Also, for the conductive composition of the present invention, due to the favorable dispersibility of conductive carbon material, therefore electrode Physical property achieves well balanced, and charge/discharge cycle characteristics are also improved in terms of battery, the characteristic of capacitor.Especially It is, when specific in the present invention with the ratio between the gross mass of water-soluble resin adhesive (B) and water-dispersed resin particulate binder (C) In the range of when, show the balance of the good electrode physical property such as the dispersity, cohesive, electric conductivity of material, enter And obtain good battery, capacitor specific characteristics.Battery, capacitor are used in harsh hot environment sometimes, and durability is Important, therefore the balance of electrode physical property is considered as very important.

When the cohesive of electrode is insufficient, it is difficult to keep the long durability of battery, capacitor, therefore can cause bad Change.Such as situation of comparative example 1, when the decentralised control of conductive carbon material is insufficient, it is seen that have the cohesive of electrode insufficient Tendency, can significantly see degradation phenomena.In this regard, there is following consideration：When the decentralised control of conductive carbon material is insufficient, Due to not forming uniform conductive network when electrode is made, thus cause in electrode the distribution of resistance because of caused by local aggegation Occur；Due to occurring current convergence as battery or during capacitor, thus cause the promotion of deterioration.

In addition, as shown in Table 3, 4, compared with without using the evaluation result of the comparative example 11 of basalis, it is known that when using In good state during the basalis formed by the conductive composition of the present invention.In addition, by comparative example in comparative example 12 Conductive composition be used for basalis when, it is impossible to obtain good physical property.For its reason, it is believed that be collector with Tacky state between composite layer is in insufficient state on the contrary, is place during as electrode compared to unused basalis In the reason of uneven state, and think that the result confirms that the balance of electrode physical property is important.

Claims

1. a kind of conductive composition, it contains conductive carbon material A, water-soluble resin adhesive B, water-dispersed resin particulate Adhesive C and aqueous liquid medium D, it is characterised in that

The water-dispersed resin particulate binder C be by the ethene that will contain following monomer C1 and C2 with following ratios not Saturation monomer carries out resin particle obtained from emulsion polymerization,

C1 is from by the ethylene unsaturated monomer c1 with simple function or multifunctional alkoxysilyl and in a molecule At least one monomer selected in the group that monomer c2 with more than two ethene unsaturated groups is constituted：0.1~5 weight Measure %,

Ethylene unsaturated monomer c3s of the C2 in addition to the monomer c1~c2：95~99.9 weight %,

The total amount of the c1~c3 is set to 100 weight %,

The ratio that conductive carbon material A occupies in the total solid content content of the conductive composition is 20~70 weights Measure %,

100 weight % are added up in water-soluble resin adhesive B and water-dispersed resin particulate binder C solid component content In, water-soluble resin adhesive B content is 40~95 weight %.

2. conductive composition as claimed in claim 1, it is characterised in that

The conductive composition is by conductive carbon material A, water-soluble resin adhesive B, water-dispersed resin particulate binder C Constituted with aqueous liquid medium D.

3. conductive composition as claimed in claim 1 or 2, it is characterised in that

It is the conductive composition of the basalis formation of electrode for power storage device.

4. a kind of collector of electrical storage device with basalis, it is characterised in that

It has：

Collector；And

The basalis formed as the conductive composition any one of claims 1 to 3.

5. a kind of electrode for power storage device, it is characterised in that

It has：

Collector；

The basalis formed as the conductive composition any one of claims 1 to 3；And

The composite layer formed by the composition for electrode formation containing electrode active material and adhesive.

6. a kind of electrical storage device, it has positive pole, negative pole and electrolyte, it is characterised in that

At least one of the positive pole and the negative pole are the electrode for power storage device described in claim 5.

7. conductive composition as claimed in claim 3, it is characterised in that

The electrical storage device is secondary cell or capacitor.

8. the collector of basalis is carried as claimed in claim 4, it is characterised in that

The electrical storage device is secondary cell or capacitor.

9. electrode as claimed in claim 5, it is characterised in that

The electrical storage device is secondary cell or capacitor.

10. electrical storage device as claimed in claim 6, it is characterised in that

The electrical storage device is secondary cell or capacitor.