CN109721673A - A kind of lithium battery compound binding agent and preparation method thereof - Google Patents
A kind of lithium battery compound binding agent and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of lithium battery compound binding agents and preparation method thereof, using styrene and butadiene as raw material, using SEI film for additive as functional additive, are prepared by the method for in-situ copolymerization；The SEI film for additive that the present invention is added in synthesis process early period together with binder material copolymerization; obtained compound binding agent has both the function of binder and SEI film; while maintaining electrode structure and conductive network integrality; also active material particle is played a certain protective role; again because there is the presence of SEI film for additive, the compatibility of the compound binding agent and electrolyte is preferable.In addition, conductive agent emulsion can also be added in synthesis process early period, SEI film for additive can play synergistic effect with conductive agent, improve the electric conductivity of electrode and the stability of electrode material granules, thus more preferably using the chemical property of the lithium ion battery of the compound binding agent.
Description
[technical field]
The invention belongs to adhesive for lithium battery correlative technology fields, and in particular to a kind of lithium battery compound binding agent and
Preparation method.
[background technique]
Lithium ion battery has many advantages, such as high-energy density, long circulation life, low self-discharge rate, environment friendly and pollution-free, is
One of widest secondary cell is applied and studies at present, in consumption-orientation portable electronic device, aerospace, electronic vapour
The fields such as vehicle, energy-storage system obtain application.However, with the extensive use of lithium ion battery, in battery specific capacity, forthright again
More stringent requirements are proposed in terms of energy, cycle performance.
Lithium ion battery is made of anode, cathode, diaphragm, electrolyte, package casing, and wherein positive and negative pole material is largely
On determine the performance of lithium ion battery.In terms of negative electrode material, though graphite material has realized commercialization, actual specific capacity is current
Its theoretical specific capacity 372mAh/g is had been approached, is still difficult to meet the needs of market is to high capacity cathode.Therefore, there is higher theory
Silica-base material, tin-based oxide material, the transition metal oxide material of specific capacity become current research hotspot and application
Trend.However the above material is while providing more height ratio capacity, the SEI film also formed with huge volume change, surface
Constantly by broken ring, electrolyte is constantly consumed, Yi Fenhua, fall off from collector, electrode structure is impaired, so as to cause multiplying power
The problems such as performance and poor cycle performance.
It is to improve lithium cell cathode material chemical property using suitable binder, improves lithium ion battery specific capacity
Effective way, the binder should meet following several requirements: (1) in cathode pole piece preparation process, can with active material and lead
Electric agent is uniformly dispersed, and uniform conductive network skeleton is formed between negative electrode material particle；(2) in lithium ion battery charge and discharge
Cheng Zhong combines closely with the negative electrode material that repeated volume change, is able to maintain that the integrality of electrode structure and conductive network；
(3) preferable with the compatibility of electrolyte.
Styrene-butadiene latex (SBR) is a kind of important negative electrode binder, but it only provides binder effect at present.
[summary of the invention]
For the above-mentioned technical problems in the prior art, the present invention provides one kind can improve cathode pole piece conduction
Property, and the lithium battery compound binding agent and preparation method thereof of cathode SEI membrane stability can be improved, by lithium battery SBR
In the synthesis process of binder be added SEI film for additive carry out in-situ copolymerization to get to have both cementation, stabilization SEI film
It acts on, the compound binding agent of electric action.
In order to achieve the above objectives, main technical schemes of the invention are as follows:
A kind of lithium battery compound binding agent adds using styrene and butadiene as raw material using SEI film for additive as function
Add agent, is prepared by the method for in-situ copolymerization.
Further, the lithium battery compound binding agent, by weight, including following components:
Combination partner A: conductive agent emulsion: 0-50 parts, deionized water: 100-200 parts, Electrolyte qs, appropriate chelating agent,
PH buffer is appropriate；
Combination partner B: butadiene: 30-80 parts, styrene: 20-70 parts, unsaturated carboxylic acid: 1-5 parts, function monomer: 2-6
Part, compound emulsifying agent: 1-4 part, initiator: 0.3-1.5 parts, molecular weight regulator: 0.1-0.6 parts, PH buffer in right amount, SEI
Film for additive: 5-50 parts.
Further, the SEI film for additive includes vinylene carbonate, vinylethylene carbonate, 1,3- acrylic-
Any one or more combination in sultones, vinyl ethylene sulfite.
Further, the conductive agent emulsion is made of conductive agent, surfactant and water.
Further, the conductive agent be carbon nanotube, it is SP, carbon black, acetylene black, Ketjen black, any one in graphene
Kind or multiple combinations.
Further, the surfactant is dodecyl trimethyl ammonium bromide, disproportionated rosin acid first, benzene sulfonamide
Hydrochlorate, alkylsulfonate, alkyl sulfate, alkyl sulfate, Alkyl ethoxy carboxylate acid salt, di-2-ethylhexylphosphine oxide naphthalene sulfonate,
Any one or more combination in oleoyl methyl taurate, alpha-olefin sulfuric ester.
Further, the unsaturated carboxylic acid is acrylic acid, methacrylic acid, any one or more group in itaconic acid
It closes；The function monomer is one or two kinds of combinations of acrylonitrile, acrylamide；The compound emulsifying agent is anion emulsifier
With any one or two kinds in nonionic emulsifier, the molecular weight regulator is lauryl mercaptan.
Further, the anion emulsifier includes sodium alkyl sulfate, sodium alkyl sulfonate, sodium alkyl benzene sulfonate, alkyl
Any one or more combination of diphenyl oxide disulfonate；The nonionic emulsifier includes ethylene oxide, adduct number 5-40
Alkyl phenol polyoxyethylene ether in the combination of any one or two kinds.
A kind of preparation method of lithium battery compound binding agent as described above, comprising the following steps:
S1: after polymeric kettle is vacuumized, each component in combination partner A is successively added, is uniformly dispersed, obtains mixed solution
Ⅰ；
S2: mixed solution I is heated；
S3: each component in combination partner B being gradually added dropwise into mixed solution I, carries out insulation reaction；
S4: measurement reaction conversion ratio is de-gassed when conversion ratio reaches 98% or more, obtains latex；
S5: the pH value of latex is adjusted with PH buffer, cooling processing is carried out, obtains lithium battery compound binding agent.
A kind of electrode of lithium cell uses compound binding agent using lithium electricity as described above.
Compared to the prior art, beneficial effects of the present invention are as follows:
A kind of lithium battery compound binding agent of the present invention, the SEI film for additive being added in synthesis process early period is together
With binder material copolymerization, obtained compound binding agent has both the function of binder and SEI film, is maintaining electrode structure and conduction
While network integrity, also active material particle is played a certain protective role, and because has depositing for SEI film for additive
The compatibility of the compound binding agent and electrolyte is preferable.In addition, conductive agent emulsion can also be added in synthesis process early period,
Conductive agent emulsion can be copolymerized together or be dispersed between adhesive particle, and SEI film forming agent can also play with conductive agent and cooperate with work
With, uniform conductive network frame is formed between active material particle, thus use the lithium ion battery of the compound binding agent
Chemical property more preferably.
[Detailed description of the invention]
Fig. 1 is the infrared spectrogram of lithium battery compound binding agent obtained in embodiment 1, embodiment 2 and comparative example 1.
[specific embodiment]
A kind of lithium battery compound binding agent adds using styrene and butadiene as raw material using SEI film for additive as function
Add agent, is prepared by the method for in-situ copolymerization.
Further, the lithium battery compound binding agent, by weight, including following components:
Combination partner A: conductive agent emulsion: 0-50 parts, deionized water: 100-200 parts, Electrolyte qs, appropriate chelating agent,
PH buffer is appropriate；
Combination partner B: butadiene: 30-80 parts, styrene: 20-70 parts, unsaturated carboxylic acid: 1-5 parts, function monomer: 2-6
Part, compound emulsifying agent: 1-4 part, initiator: 0.3-1.5 parts, molecular weight regulator: 0.1-0.6 parts, PH buffer in right amount, SEI
Film for additive: 5-50 parts.
Specifically, the SEI film for additive includes vinylene carbonate, vinylethylene carbonate, 1,3- acrylic-sulphur
Any one or more combination in acid lactone, vinyl ethylene sulfite.
Specifically, the conduction agent emulsion is made of conductive agent, surfactant and water.
The conduction agent emulsion, parts by weights meter, by 3-20 parts of conductive agent, 1-20 parts of surfactant, 100-200
The deionized water composition of part；It uses following methods to prepare: surfactant being add to deionized water, heating stirring is passed through
Until dissolution, obtains the mixed solution II containing surfactant；Conductive agent is slowly added into mixed containing surfactant
It closes in solution II, by way of stirring or ultrasound, obtains finely dispersed conductive agent emulsion.
Specifically, the conductive agent is carbon nanotube, SP, carbon black, acetylene black, Ketjen black, any one in graphene
Or multiple combinations.
Specifically, the surfactant is dodecyl trimethyl ammonium bromide, disproportionated rosin acid first, alkyl benzene sulphonate
Salt, alkylsulfonate, alkyl sulfate, alkyl sulfate, Alkyl ethoxy carboxylate acid salt, di-2-ethylhexylphosphine oxide naphthalene sulfonate, oil
Any one or more combination in acyl methyl taurate, alpha-olefin sulfuric ester.
Specifically, the electrolyte is potassium chloride, sodium sulphate, EDETATE SODIUM, any one or more in sodium formaldehyde sulfoxylate.
Specifically, the PH buffer is sodium dihydrogen phosphate, sodium bicarbonate, sodium acetate, sodium citrate, triethylamine, ammonium hydroxide
Deng one or more combinations.
Specifically, the chelating agent is disodium EDTA, polyphosphate, amino carboxylic acid 1,3- diketone, hydroxyl
One of carboxylic acid, polyamines or multiple combinations.
Specifically, the unsaturated carboxylic acid is acrylic acid, any one or more group in methacrylic acid, itaconic acid
It closes, the function monomer is acrylonitrile, any one or two kinds of combinations, the compound emulsifying agent in acrylamide are anion
Any one in emulsifier and nonionic emulsifier or two kinds of combinations；The molecular weight regulator is lauryl mercaptan.
Specifically, the anion emulsifier includes sodium alkyl sulfate, sodium alkyl sulfonate, sodium alkyl benzene sulfonate, alkyl two
Any one or more combination in phenylate sodium disulfonate；The nonionic emulsifier includes ethylene oxide, adduct number 5-40
Alkyl phenol polyoxyethylene ether in the combination of any one or two kinds.
Specifically, the initiator is persulfate.
A kind of preparation method of lithium battery compound binding agent as described above, comprising the following steps:
S1: after polymeric kettle is vacuumized, each component in combination partner A is successively added, is uniformly dispersed, obtains mixed solution
Ⅰ；
S2: mixed solution I is heated；
S3: each component in combination partner B being gradually added dropwise into mixed solution I, carries out insulation reaction；
S4: measurement reaction conversion ratio is de-gassed when conversion ratio reaches 98% or more,
Obtain latex；
S5: latex pH value is adjusted with PH buffer, cooling processing is carried out, obtains lithium battery compound binding agent.
As preferred embodiment, in the preparation method of above-mentioned lithium battery compound binding agent, the heating process of S2,
75 DEG C are risen to the heating rate of 0.5-1 DEG C/min；The time that component B is added dropwise in S3 is 2-3h, and the temperature of insulation reaction is 75-
95℃；As the reaction conversion ratio > 98% measured in S4, polymeric kettle is de-gassed；The lye adjusts the PH of latex
Control is between 7.0-8.0, and temperature is slowly dropped to 30 DEG C or less while adjusting pH value.
As another preferred embodiment, in the preparation method of above-mentioned lithium battery compound binding agent, can also first synthesize
8-15 parts of the seed latex is added to the mixing of S1 by weight by the seed latex of lithium battery compound binding agent
In solution I, subsequent technique, each component raw material are constant, are no longer described in detail herein.
The seed latex includes following raw material components:
Combination partner X: conductive agent emulsion: 0-10 parts, deionized water: 150-350 parts, Electrolyte qs, appropriate chelating agent,
PH buffer is appropriate.
Combination partner Y: butadiene: 5-40 parts, styrene: 30-50 parts, compound emulsifying agent: 5-10 parts, molecular-weight adjusting
Agent: 0.1-0.6 parts, PH buffer is appropriate, SEI film for additive: 0-25 parts.
The preparation process of above-mentioned seed latex is as follows:
1. polymeric kettle is vacuumized rear each component successively plus in combination partner X and combination partner Y to obtain by stirring
Finely dispersed mixed solution III；
2. heating to mixed solution III, it is warming up to 40-60 DEG C；
3. 0.1-1.3 parts of initiators are added, 10-15h is reacted；
4. reaction conversion ratio is measured, when conversion ratio reaches 98% or more, is cooled to 30 DEG C or less to get seed latex.
A kind of electrode of lithium cell uses lithium battery compound binding agent as described above.
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, cannot
It is considered limitations on the claims, can not be used to limit the present invention.
Embodiment 1
In the present invention, include following raw material and component in the lithium battery compound binding agent preparation process:
Combination partner A: carbon nanotube lotion: 10 parts, deionized water: 150 parts, appropriate sodium sulphate, appropriate chelating agent, PH it is slow
Appropriate electuary.
Combination partner B: butadiene: 35 parts, styrene: 40 parts, acrylic acid: 2 parts, acrylonitrile: 3 parts, detergent alkylate sulphur
Sour sodium: 2 parts, ammonium persulfate: 0.5 part, lauryl mercaptan: 0.3 part, PH buffer is appropriate, vinylene carbonate: 25 parts.
Preparation process is as follows:
S1: vacuumizing rear each component successively plus in combination partner A for polymeric kettle, stir 4h, obtains finely dispersed mixed
Close solution I.
S2: heating mixed solution I, and heating rate is 0.5 DEG C/min, is warming up to 75 DEG C.
S3: each component in component B being gradually added dropwise into mixed solution I, and time for adding is controlled in 2.5h, solution reaction temperature
Degree control carries out insulation reaction 4h at 80 DEG C.
S4: measurement reaction conversion ratio is de-gassed when conversion ratio reaches 98% or more, obtains latex；
S5: latex pH value is adjusted with sodium acetate, while being cooled to after 25 DEG C, lithium battery compound binding agent is obtained.
The preparation of carbon nanotube lotion
10 parts of neopelexes are added in 100 parts of deionized waters, by heating stirring until dissolution, obtains
Mixed solution II containing surfactant.
8 parts of carbon nanotube powders are slowly added into the mixed solution II containing surfactant, by stirring or surpassing
The mode of sound obtains finely dispersed conductive agent emulsion.
Embodiment 2
In the present invention, include following raw material and component in the lithium battery compound binding agent preparation process:
Combination partner A: deionized water: 150 parts, appropriate sodium sulphate, appropriate chelating agent, PH buffer it is appropriate.
Combination partner B: butadiene: 35 parts, styrene: 40 parts, acrylic acid: 2 parts, acrylonitrile: 3 parts, detergent alkylate sulphur
Sour sodium: 2 parts, ammonium persulfate: 0.5 part, lauryl mercaptan: 0.3 part, PH buffer is appropriate, vinylene carbonate: 25 parts.
Preparation process is as follows:
S1: vacuumizing rear each component successively plus in combination partner A for polymeric kettle, stir 4h, obtains finely dispersed mixed
Close solution I.
S2: heating mixed solution I, and heating rate is 1 DEG C/min, is warming up to 75 DEG C.
S3: each component in combination partner B being gradually added dropwise into mixed solution I, and time for adding is controlled in 2h, solution reaction
Temperature is controlled at 85 DEG C, carries out insulation reaction 3h.
S4: measurement reaction conversion ratio is de-gassed when conversion ratio reaches 98% or more；
S5: latex pH value is adjusted with ammonium hydroxide, be cooled to after 25 DEG C, obtains lithium battery compound binding agent.
Embodiment 3
Firstly, first synthesizing the seed latex of compound binding agent, concrete component is as follows:
Combination partner X:SP lotion: 8 parts, deionized water: 250 parts, appropriate sodium sulphate, appropriate chelating agent, PH buffer it is suitable
Amount.
Combination partner Y: butadiene: 30 parts, styrene: 30, compound emulsifying agent: 6 parts, lauryl mercaptan: 0.2 part, PH
Buffer, vinylethylene carbonate: 20 parts.
The preparation process of the seed latex is as follows:
S1: polymeric kettle is vacuumized into rear each component successively plus in combination partner A and B, 5h is stirred, obtains finely dispersed
Mixed solution III.
S2: heating mixed solution III, is warming up to 50 DEG C.
S3: being added 0.1-1.3 parts of potassium peroxydisulfates, reacts 12h.
S4: measurement reaction conversion ratio obtains seed latex when conversion ratio reaches 98% or more, is cooled to 20 DEG C or less.
Include following components in the preparation process of lithium battery compound binding agent:
Combination partner A:SP lotion: 18 parts, seed latex: 20 parts, deionized water: 150 parts, appropriate sodium sulphate, chelating agent
In right amount, PH buffer is appropriate.
Combination partner B: butadiene: 50 parts, styrene: 60 parts, acrylic acid: 2 parts, acrylonitrile: 4 parts, detergent alkylate sulphur
Sour sodium: 2 parts, ammonium persulfate: 0.8 part, lauryl mercaptan: 0.1 part, PH buffer it is appropriate, VEC:25 parts.
Specific preparation process is as follows:
S1: vacuumizing rear each component successively plus in combination partner A for polymeric kettle, stir 4h, obtains finely dispersed mixed
Close solution I.
S2: heating mixed solution I, and heating rate is 1 DEG C/min, is warming up to 75 DEG C.
S3: the material composition in combination partner B being gradually added dropwise into mixed solution I, and time for adding is controlled in 3h, and solution is anti-
It answers temperature control at 85 DEG C, carries out insulation reaction 5h.
S4: measurement reaction conversion ratio is de-gassed when conversion ratio reaches 98% or more；
S5: latex pH value is adjusted with ammonium hydroxide, be cooled to after 20 DEG C, obtains lithium battery compound binding agent.
The preparation of SP lotion
20 parts of neopelexes are added in 100 parts of deionized waters, by heating stirring until dissolution, obtains
Mixed solution II containing surfactant.
10 parts of SP powder are slowly added into the mixed solution II containing surfactant, stirring or the side of ultrasound are passed through
Formula obtains finely dispersed SP lotion
Comparative example 1
It include following raw material and component in the preparation process of comparative example 1, without SEI film for additive and conductive agent emulsion:
Combination partner A: deionized water: 150 parts, appropriate sodium sulphate, appropriate chelating agent, PH buffer it is appropriate.
Combination partner B: butadiene: 35 parts, styrene: 40 parts, acrylic acid: 2 parts, acrylonitrile: 3 parts, detergent alkylate sulphur
Sour sodium: 2 parts, ammonium persulfate: 0.5 part, lauryl mercaptan: 0.3 part, PH buffer it is appropriate.
Preparation process is as follows:
S1: polymeric kettle is vacuumized into rear material composition successively plus in combination partner A, 4h is stirred, obtains finely dispersed
Mixed solution I.
S2: heating mixed solution I, and heating rate is 0.5 DEG C/min, is warming up to 75 DEG C.
S3: the material composition in combination partner B being gradually added dropwise into mixed solution I, and time for adding is controlled in 2.5h, solution
Reaction temperature is controlled at 80 DEG C, carries out insulation reaction 4h.
S4: measurement reaction conversion ratio is de-gassed when conversion ratio reaches 98% or more；
S5: latex pH value is adjusted with ammonium hydroxide, be cooled to after 25 DEG C, obtains lithium battery compound binding agent.
The binder that embodiment 1, embodiment 2 and comparative example 1 are prepared, infrared spectroscopy are distinguished referring to Fig. 1, C, B, A
It is embodiment 1, embodiment 2, binder sample made from comparative example 1, three groups of samples are in 700,2915cm-1And 3100-
3680cm-1Between have common characteristic peak, respectively correspond the flexible vibration of the vibration of phenyl ring mono-substituted c h bond, C-H in alkane
The stretching vibration of C-H dynamic, in carbon-carbon double bond, illustrate the binder sample of embodiment 1 and embodiment 2 have comparative example 1 at
Point.In addition, being located at 1075cm in B and C-1And 1156cm-1Two peak positions, 1790cm-1And 1830cm-1Two peak positions, be
The characteristic peak of SEI film for additive VC respectively corresponds the stretching vibration of C-O-C key and the stretching vibration of C=O key, illustrates the SEI
Film for additive is successfully introduced into compound binding agent.To with carbon nanotube in the infrared spectroscopy of 1 binder sample of embodiment
The characteristic peak of conductive agent and the characteristic peak of other compositions are overlapped mutually influence, in 1574cm-1Locate the E of carbon nanotube tube wall1uVibration
Mould is overlapped with the characteristic peak of Binder Composition, thus the principal character peak difference of 2 sample of embodiment 1 and embodiment is little.More than
As a result illustrate, SEI film for additive, conductive agent can be introduced into binder by means of the present invention, obtain compound binding agent.
Binder made from embodiment 1, embodiment 2 and comparative example 1 is used as to the binder of lithium ion battery negative material,
Carry out cycle performance test.Specific preparation process is as follows: using graphite as negative electrode material, binder sample prepared by the present invention, CMC
It is that conductive agent is combined slurrying, coating, baking for thickener, SP, obtains cathode pole piece, wherein the mass ratio of each component is negative
Pole main material: SP:CMC:SBR=95.1:2.1:1.1:1.7.By cathode pole piece, the diaphragm with alumina ceramic coating, lithium metal,
Concentration is 1M LiPF6EC-EMC-DEC (volume ratio 1:1:1) electrolyte solution, argon gas protect atmosphere under glove box
Middle assembling button cell, and cycle performance test is carried out, it discharges according to 0.5C, 0.2C, 0.1C, 0.05C, the sequence of 0.2C charging
Cycle performance test is carried out, wherein charging/discharging voltage section is 3-0.005V.
First all efficiency and capacity retention ratio are calculated according to the following formula:
First week efficiency [%]=[the first all discharge capacities of week charging capacity/head] * 100
Capacity retention ratio [%]=[charging capacity of charging capacity/1st week in xth week] * 100
Embodiment 1, all charge/discharge capacities of head of embodiment 2 and comparative example 1 and first all efficiency and capacity at the 30th week
Conservation rate result is referring to following table.From table 1 it follows that all charge/discharge capacities of head of 2 battery sample of embodiment 1 and embodiment and
First week efficiency difference is smaller, wherein first week efficiency is respectively 94.0% and 94.1%, and the reversible charge/discharge capacity in embodiment 1
Slightly above embodiment 2, and all efficiency of the head of 1 battery of comparative example is only 87.4%.In addition, embodiment 1, implementation when at the 50th week
The capacity retention ratio of example 2 and comparative example 1 is respectively 97.3%, 96.1%, 90.2%.By comparing it is observed that using real
The battery performance of 2 binder of example 1 and embodiment is applied better than comparative example 1.Illustrate in the synthesis process of binder, the SEI of addition
Film for additive can promote cathode particle surface to form stable SEI film, reduce irreversible capacitance loss, while basic herein
The upper suitable conductive additive of addition, additionally it is possible to which the electric conductivity for further increasing cathode makes electrode have excellent electrochemistry
Energy.
The battery testing data of table 1 embodiment 1,2 and comparative example 1
It should be noted that the above content is combine specific optimal technical scheme made for the present invention further detailed
Illustrate, and it cannot be said that specific implementation of the invention is only limited to these instructions.For the professional skill of the technical field of the invention
For art personnel, without departing from the inventive concept of the premise, a number of simple deductions or replacements can also be made, all should be considered as
It belongs to the scope of protection of the present invention.
Claims (10)
1. a kind of lithium battery compound binding agent, which is characterized in that using styrene and butadiene as raw material, formed a film and added with SEI
Agent is functional additive, is prepared by the method for in-situ copolymerization.
2. lithium battery compound binding agent according to claim 1, which is characterized in that by weight, comprising with the following group
Point:
Combination partner A: conductive agent emulsion: 0-50 parts, deionized water: 100-200 parts, Electrolyte qs, appropriate chelating agent, PH it is slow
Appropriate electuary；
Combination partner B: butadiene: 30-80 parts, styrene: 20-70 parts, unsaturated carboxylic acid: 1-5 parts, function monomer: 2-6 parts,
Compound emulsifying agent: 1-4 parts, initiator: 0.3-1.5 parts, molecular weight regulator: 0.1-0.6 parts, PH buffer is appropriate, SEI film forming
Additive: 5-50 parts.
3. lithium battery compound binding agent according to claim 1 or 2, which is characterized in that the SEI film for additive packet
Include vinylene carbonate, vinylethylene carbonate, 1,3- acrylic-sultones, any in vinyl ethylene sulfite
One or more combinations.
4. lithium battery compound binding agent according to claim 2, which is characterized in that the conduction agent emulsion is by conduction
Agent, surfactant and deionized water composition.
5. lithium battery compound binding agent according to claim 2, which is characterized in that the conductive agent be carbon nanotube,
SP, carbon black, acetylene black, Ketjen black, any one or more combination in graphene.
6. lithium battery compound binding agent according to claim 4, which is characterized in that the surfactant is dodecane
Base trimethylammonium bromide, disproportionated rosin acid first, alkylbenzene sulfonate, alkylsulfonate, alkyl sulfate, alkyl sulfate, alkane
Base polyethenoxy ether carboxylate, di-2-ethylhexylphosphine oxide naphthalene sulfonate, oleoyl methyl taurate, any one in alpha-olefin sulfuric ester
Or multiple combinations.
7. lithium battery compound binding agent according to claim 2, which is characterized in that the unsaturated carboxylic acid is propylene
Acid, methacrylic acid, the combination of any one or more in itaconic acid, the function monomer are acrylonitrile, acrylamide, institute
State the combination that compound emulsifying agent is any one or two kinds in anion emulsifier and nonionic emulsifier, the molecular weight tune
Section agent is lauryl mercaptan.
8. lithium battery compound binding agent according to claim 7, which is characterized in that the anion emulsifier includes alkane
Any one or more combination of base sodium sulphate, sodium alkyl sulfonate, sodium alkyl benzene sulfonate, alkyl diphenyl ether disulphonic acid sodium；It is described
Any one in the alkyl phenol polyoxyethylene ether that nonionic emulsifier includes ethylene oxide, adduct number is 5-40 or two kinds of groups
It closes.
9. as the described in any item lithium battery compound binding agents of claim 2-8 preparation method, which is characterized in that including with
Lower step:
S1: after polymeric kettle is vacuumized, each component in combination partner A is successively added, is uniformly dispersed, obtains mixed solution I；
S2: mixed solution I is heated；
S3: each component in combination partner B being gradually added dropwise into mixed solution I, carries out insulation reaction；
S4: measurement reaction conversion ratio is de-gassed when conversion ratio reaches 98% or more, obtains latex；
S5: latex pH value is adjusted with PH buffer, cooling processing is carried out, obtains lithium battery compound binding agent.
10. a kind of electrode of lithium cell, which is characterized in that use the described in any item lithium battery compoiste adherings of claim 1-9
Agent.
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| CN110265711A (en) * | 2019-07-11 | 2019-09-20 | 北京卫蓝新能源科技有限公司 | A kind of solid electrolyte film and its preparation method and application |
| CN111234105A (en) * | 2020-01-20 | 2020-06-05 | 珠海冠宇电池有限公司 | Vinylene carbonate modified binder and lithium ion battery containing same |
| CN111303358A (en) * | 2020-03-27 | 2020-06-19 | 珠海冠宇电池有限公司 | Adhesive, preparation method and application thereof |
| CN113224305A (en) * | 2021-05-10 | 2021-08-06 | 衢州德联环保科技有限公司 | Preparation method of modified polyvinylidene fluoride for lithium ion battery |
| CN113736002A (en) * | 2021-09-13 | 2021-12-03 | 江西迪比科股份有限公司 | Modified polyhalogenated styrene-1, 3-butadiene emulsion binder, preparation and application thereof |
| WO2023053926A1 (en) * | 2021-09-30 | 2023-04-06 | 日本ゼオン株式会社 | Electrically conductive material paste for nonaqueous secondary battery, slurry for nonaqueous secondary battery negative electrode, negative electrode for nonaqueous secondary battery, and nonaqueous secondary battery |
| WO2023145612A1 (en) * | 2022-01-31 | 2023-08-03 | 日本ゼオン株式会社 | Carbon nanotube liquid dispersion, slurry for negative electrodes for nonaqueous secondary batteries, negative electrode for nonaqueous secondary batteries, and nonaqueous secondary battery |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110265711A (en) * | 2019-07-11 | 2019-09-20 | 北京卫蓝新能源科技有限公司 | A kind of solid electrolyte film and its preparation method and application |
| CN111234105A (en) * | 2020-01-20 | 2020-06-05 | 珠海冠宇电池有限公司 | Vinylene carbonate modified binder and lithium ion battery containing same |
| CN111303358A (en) * | 2020-03-27 | 2020-06-19 | 珠海冠宇电池有限公司 | Adhesive, preparation method and application thereof |
| CN113224305A (en) * | 2021-05-10 | 2021-08-06 | 衢州德联环保科技有限公司 | Preparation method of modified polyvinylidene fluoride for lithium ion battery |
| CN113224305B (en) * | 2021-05-10 | 2022-04-01 | 山东天瀚新能源科技有限公司 | Preparation method of modified polyvinylidene fluoride for lithium ion battery |
| CN113736002A (en) * | 2021-09-13 | 2021-12-03 | 江西迪比科股份有限公司 | Modified polyhalogenated styrene-1, 3-butadiene emulsion binder, preparation and application thereof |
| WO2023053926A1 (en) * | 2021-09-30 | 2023-04-06 | 日本ゼオン株式会社 | Electrically conductive material paste for nonaqueous secondary battery, slurry for nonaqueous secondary battery negative electrode, negative electrode for nonaqueous secondary battery, and nonaqueous secondary battery |
| WO2023145612A1 (en) * | 2022-01-31 | 2023-08-03 | 日本ゼオン株式会社 | Carbon nanotube liquid dispersion, slurry for negative electrodes for nonaqueous secondary batteries, negative electrode for nonaqueous secondary batteries, and nonaqueous secondary battery |
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