CN108023057A - Flexibility is without collector battery pole piece, battery and preparation method thereof - Google Patents
Flexibility is without collector battery pole piece, battery and preparation method thereof Download PDFInfo
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- CN108023057A CN108023057A CN201711191941.8A CN201711191941A CN108023057A CN 108023057 A CN108023057 A CN 108023057A CN 201711191941 A CN201711191941 A CN 201711191941A CN 108023057 A CN108023057 A CN 108023057A
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- pole piece
- battery pole
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- flexibility
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The present invention relates to a kind of flexibility without collector battery pole piece, battery and preparation method thereof.The preparation method of the flexibility without collector battery pole piece includes：Electrode slurry is provided, it includes solvent, binding agent, dispersed electrode active material and can select the dispersant or thickener for adding or not adding.Compared with prior art, the preparation method of the present invention does not use organic solvent in whole preparation process, it is environmentally friendly and avoid to staff produce potential hazard, at the same time, the preparation method of the present invention prepares battery pole piece without using collector, greatly reduce manufacturing cost and technology difficulty, and it is preparation-obtained it is flexible without collector battery pole piece it is conductive it is good, packing density is high, electrode active material load capacity is big, specific capacity is high, stability is good, the advantages that excellent mechanical flexibility and mechanical strength.
Description
Technical field
The present invention relates to a kind of flexibility without collector battery pole piece, battery and preparation method thereof.
Background technology
As the gradual prevalence of wearable electronic, development are portable, flexible, extensible or even human implantable
Frivolous flexible electronic device recently becomes the common research hotspot of academia and industrial quarters.All kinds of display screens, bent of winding
Memory, Intellectual garment are decorated with and the prototype of the device such as implanted medical energy converter comes out one after another, are just leading a new flexible electronic
The social mode of people, habits and customs certainly will be produced the revolutionary impact for being similar to smart mobile phone and bringing by high technological tide.Will
Allow wearable device really to meet daily life needs, i.e., how to allow smart machine i.e. wearing comfort but also with for a long time
Cruising ability, developing corresponding flexible power-supply system becomes one of technological difficulties urgently captured.
Energy conversion currently used for portable intelligent device mainly includes lithium ion battery, super capacitor with memory device
Device and photovoltaic cell etc..In order to allow bent, the extensible and fatigue resistance that makes these equipment possess mechanically, again
Do not sacrifice its energy conversion efficiency, energy storage densities and Reversible Cycle service life, people are to forming the major functions of these equipment
Material such as electrode, collector, electrolyte and encapsulating material have done substantial amounts of modification and have achieved some preliminary progress.
However, up to the present above-mentioned most of device still only resides within the prototype stage, to be really applied to reality still
There are performance deficiency, manufacturing cost is high, complex process and the stability urgent problem to be solved such as not enough.Also, present big portion
Point battery pole piece organic solvent is often used in preparation process, potential hazard and can be to environment easily is produced to staff
Cause necessarily to pollute.
The content of the invention
In view of the deficiencies of the prior art, it is an object of the invention to provide a kind of flexibility without collector battery pole piece, battery
And preparation method thereof, good conductivity, packing density height, electrode activity can be prepared with simple technique and the production of cheap cost
Material load amount is big, and the battery pole piece with excellent mechanical flexibility and mechanical strength.
To reach above-mentioned purpose, the present invention provides following technical solution：A kind of preparation of the flexibility without collector battery pole piece
Method, comprises the following steps：
Electrode slurry is provided, the electrode slurry includes solvent, binding agent, dispersed electrode active material and can
Added with selection or do not add dispersant or thickener；
High temperature and pressure filtration treatment is carried out to the electrode slurry, obtains the flexibility without collector battery pole piece.
Further, the condition of the high temperature and pressure filtering includes：Temperature is 0-300 DEG C, is preferably 0-100 DEG C, pressure
It is preferably 0.5-8MPa for more than 0.1Mpa, filter opening aperture is not more than 1 μm, is preferably 0.2-0.5 μm.
Further, including：The high temperature and pressure filtration treatment is carried out to the electrode slurry in protective atmosphere.
Further, the specific steps of the high temperature and pressure filtering include：
The electrode slurry is heated to 0-300 DEG C in protective atmosphere, and is filtered under the pressure of 0.1-10MPa；
Keep temperature and pressure afterwards until after product drying, cool down pressure release and by the flexibility of formation without collector battery pole
Piece is separated with filtering material.
Further, nitrogen, argon gas or helium are included for forming the gas of the protective atmosphere, but not limited to this.
Further, the filtering material includes cellulosic filter paper, polypropylene filter, polyethylene filter membrane, nylon leaching film, poly-
Ether sulfone filter membrane, glass fiber filter, polyester filter membrane, Kynoar filter membrane, teflon membrane filter or ceramic filtration membrane, but it is unlimited
In this.
Further, the solvent is water or the cosolvent based on water.
Further, the electrode active material includes metal salt, metal oxide, metal, non-metal simple-substance, nonmetallic
The compound of oxide or more material, but not limited to this.
Further, the binding agent includes polyacrylic acid and/or its esters, polymethylacrylic acid and/or its esters, gathers
Acrylamide, polymethacrylamide, polyacrylonitrile, polystyrene, acrylonitrile-butadiene rubber latex, SBR emulsion, polysiloxanes
Any of lotion, polyethylene glycol and polyalkylene glycol, but not limited to this.
Further, the electrode slurry further includes conductive additive.
Further, the conductive additive includes conductive carbon black, acetylene black, Ketjen black, carbon nanotubes, graphene or gold
Belong to nano wire, but not limited to this.
Further, including：The high temperature and pressure mistake is carried out to the electrode slurry using high temperature and pressure filtration apparatus
Filter handle, the high temperature and pressure filtration apparatus include sample cavity, be arranged on the sample cavity outside heating mantle, be arranged on institute
State the air inlet at the top of sample cavity, the filtering material being arranged in the sample cavity and be arranged on sample cavity bottom discharge opeing
Mouthful, it is both provided with air valve on the air inlet and leakage fluid dram.
To reach above-mentioned purpose, present invention also offers a kind of as flexible without collector electricity obtained by the preparation method
Pond pole piece, the flexibility include 0-5wt% dispersants, 5-30wt% binding agents and 65-95wt% without collector battery pole piece
Electrode active material and conductive additive.
To reach above-mentioned purpose, invention further provides a kind of battery, the battery includes described flexible without collector electricity
Pond pole piece.
Compared with prior art, the beneficial effects of the present invention are：The side that electrode slurry is passed through high-pressure filteration by the present invention
Method directly obtains flexibility and prepares battery pole piece without using collector without collector battery pole piece, greatly reduces preparation
Cost and technology difficulty, it is environmentally friendly without using organic solvent in preparation process, and preparation-obtained flexibility is without collection
Fluid cell pole piece it is conductive it is good, packing density is high, electrode active material load capacity is big, and with excellent mechanical flexible
The advantages that property and mechanical strength.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of specification, below with presently preferred embodiments of the present invention and coordinate attached drawing describe in detail as after.
Brief description of the drawings
Fig. 1 is a kind of flexible preparation method without collector battery pole piece shown in a typical embodiments of the invention
Flow chart；
Fig. 2 is a kind of structure diagram of high temperature and pressure filtration apparatus shown in a typical embodiments of the invention；
Fig. 3 is the electromicroscopic photograph of the negative electrode of lithium ion battery film shown in the embodiment of the present invention one；
Fig. 4 is the stress-strain diagram of the negative electrode of lithium ion battery film shown in the embodiment of the present invention one.
Fig. 5 is the half-cell charging and discharging curve of the negative electrode of lithium ion battery film shown in the embodiment of the present invention one.
Fig. 6 is the electromicroscopic photograph of the lithium ion cell positive film shown in the embodiment of the present invention two；
Fig. 7 is the stress-strain diagram of the lithium ion cell positive film shown in the embodiment of the present invention two.
Fig. 8 is the half-cell charging and discharging curve of the lithium ion cell positive film shown in the embodiment of the present invention two.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
The flexible preparation method without collector battery pole piece of the present invention comprises the following steps：
Electrode slurry is provided, the electrode slurry includes solvent, binding agent, dispersed electrode active material and can
Added with selection or do not add dispersant or thickener；
High temperature and pressure filtration treatment is carried out to the electrode slurry, obtains the flexibility without collector battery pole piece.
Fig. 1 is referred to, the flexible preparation method without collector battery pole piece of the invention concretely comprises the following steps：
Add a dispersant in solvent, obtain dispersed aqueous dispersant；Alternatively, thickener is added to molten
In agent, dispersed suspension is obtained；
By electrode active material and the abundant dusting of conductive additive and mix to obtain mixture, the mixture is added
Into the aqueous dispersant or suspension, homogeneous solid-liquid suspension is obtained；
Binding agent is added into the solid-liquid suspension, is sufficiently stirred to obtain homogeneous electrode slurry；
The electrode slurry is added into high temperature high pressure filtering device, the flexibility is obtained without afflux by high-pressure filteration
Body battery pole piece.
Wherein, the solvent includes inorganic solvent, is preferably water or the cosolvent based on water.The electrode activity material
Material includes carbon material, metal salt, metal oxide, metal, non-metal simple-substance, nonmetal oxide and ore or fossil material.
The conductive additive includes conductive carbon black, acetylene black, Ketjen black, carbon nanotubes, graphene and metal nanometer line.The bonding
Agent include polyacrylic acid and/or its esters, polymethylacrylic acid and/or its esters, polyacrylamide, polymethacrylamide,
Polyacrylonitrile, polystyrene, acrylonitrile-butadiene rubber latex, SBR emulsion, polysiloxane emulsion, polyethylene glycol and polyalkylene two
Any of alcohol or two or more combinations.
Also, described flexible without in collector battery pole piece, the dispersant quality accounting is 0-5%, the bonding
The quality accounting of agent is 5-30%, and the quality accounting of the electrode active material and conductive additive is 65-95%.
Refer to Fig. 2, the high temperature and pressure filtering shown in the flexible preparation method without collector battery pole piece of the invention
Device include sample cavity 1, be arranged on the sample cavity 1 outside heating mantle 2, be arranged on the air inlet at the top of the sample cavity 1
Mouthfuls 3 and be arranged on the sample cavity 1 interior bottom filtering material 4 and leakage fluid dram 5, on the air inlet 3 and leakage fluid dram 5 all
It is provided with air valve 6.
Wherein, during the high-pressure filteration, used pressure is 0.5-10Mpa, and used temperature is room temperature
To between 300 DEG C.During the high-pressure filteration, used filtering material 4 can be cellulosic filter paper, polypropylene filter
Film, polyethylene filter membrane, nylon leaching film, polyethersulfone membranes, glass fiber filter, polyester filter membrane, Kynoar filter membrane, polytetrafluoro
Ethene filter membrane or ceramic filtration membrane.
Illustrated technical scheme in further detail below in conjunction with some embodiments and attached drawing is prepared.
Embodiment one
The shown flexible preparation method without collector battery pole piece prepares lithium-ion electric to the present embodiment according to the present invention
Pond negative film.First the carboxymethyl cellulose (CMC) of 0.1g is dissolved in 20ml water, obtains CMC aqueous solutions.Use clipping the ball
Grinding machine is by the 325 mesh graphite powders dusting abundant with the carbon black of 0.2g of 3g and mixes to obtain mixture, and the mixture is added
Into the CMC aqueous solutions and high speed dispersion obtains uniform solid-liquid suspension.0.5ml is added in the solid-liquid suspension
The acrylonitrile-butadiene rubber latex of 45% solid content, stirring fully obtain cathode size.The cathode size is finally poured into the height
In the sample cavity of warm high pressure filtering device, polypropylene filter is provided with the sample cavity, subsequent adjusting air valve simultaneously passes through air inlet
Mouth is passed through nitrogen into sample cavity, and heating mantle is warming up to 80 degree, approximate clarification is then obtained by filtration under the pressure of 700psi
Filtrate.After when continuing insulation and small pressurize about 3, cooling pressure release simultaneously takes out polypropylene filter, and last obtained black is answered
Film is closed to tear to obtain the flexible lithium ion battery negative film of thickness about 0.2mm, electricity as shown in Figure 3 from polypropylene filter
Mirror photo, and obtained negative film electrical conductivity is up to 1000S/m, and with excellent flexibility and mechanical strength (see Fig. 4
Shown stress-strain diagram), and excellent chemical property (half-cell charging and discharging curve as shown in Figure 5).
In the present embodiment, in negative electrode of lithium ion battery thin-film process is prepared, used dispersant is CMC, is used
Inorganic solvent be water, used electrode active material is 325 mesh graphite powders, and used conductive additive is carbon black, institute
For the binding agent used for acrylonitrile-butadiene rubber latex, used filter paper is polypropylene filter, really, in other embodiments, above-mentioned
Material can be adjusted according to actual conditions.The protective gas being passed through is nitrogen, really, in other embodiments, the protection
Gas can also be other gases such as argon gas or helium.
In the present embodiment, 325 mesh graphite powders can also be mixed with carbon black by other effective ways to carry out dusting, such as
Stirring, shearing, grinding etc., make choice according to actual needs.
Embodiment two
The shown flexible preparation method without collector battery pole piece prepares lithium-ion electric to the present embodiment according to the present invention
Pond anode thin film.First the carboxymethyl cellulose (CMC) of 0.1g is dissolved in 20ml water, obtains CMC aqueous solutions.Use clipping the ball
Grinding machine is by the dusting abundant with the carbon black of 0.3g of the iron lithium phosphate powder of 4g and mixes to obtain mixture, and the mixture is added
Into the CMC aqueous solutions and high speed dispersion obtains uniform solid-liquid suspension.0.5ml is added in the solid-liquid suspension
The acrylonitrile-butadiene rubber latex of 45% solid content, stirring fully obtain anode sizing agent.The anode sizing agent is finally poured into the height
In the sample cavity of warm high pressure filtering device, polypropylene filter is provided with the sample cavity, subsequent adjusting air valve simultaneously passes through air inlet
Mouth is passed through nitrogen into sample cavity, and heating mantle is warming up to 80 degree, approximate clarification is then obtained by filtration under the pressure of 700psi
Filtrate.After when continuing insulation and small pressurize about 3, cooling pressure release simultaneously takes out polypropylene filter, and last obtained black is answered
Close film to tear to obtain the flexible lithium ion battery anode thin film of thickness about 0.15mm from polypropylene filter, as shown in Figure 6.And
And obtained negative film electrical conductivity is up to 10S/m, and with excellent flexibility and mechanical strength (stress as shown in Figure 7
Strain curve), and excellent chemical property (half-cell charging and discharging curve as shown in Figure 8).
In the present embodiment, in lithium ion cell positive thin-film process is prepared, used dispersant is CMC, is used
Inorganic solvent be water, used electrode active material is iron lithium phosphate powder, and used conductive additive is carbon black, institute
For the binding agent used for acrylonitrile-butadiene rubber latex, used filtering material is polypropylene filter, really, in other embodiments,
Above-mentioned material can be adjusted according to actual conditions.The protective gas being passed through is nitrogen, really, in other embodiments, should
Protective gas can also be other gases such as argon gas or helium.
In the present embodiment, iron lithium phosphate powder can also be mixed with carbon black by other effective ways to carry out dusting, than
Such as stir, shear, grind, made choice according to actual needs.
Embodiment three
The shown flexible preparation method without collector battery pole piece prepares lithium-ion electric to the present embodiment according to the present invention
Pond negative film.First the guar gum of 0.1g is dissolved in 20ml water, obtains aqueous guar glue solution.Using high speed ball mill by 1g
Nano-silicon powder, 3g the dusting abundant with the Ke Qinhei of 0.3g of 2000 mesh graphite and mix to obtain mixture, will be described mixed
Compound is added into the aqueous guar glue solution and high speed dispersion obtains uniform solid-liquid suspension.In the solid-liquid suspension
The polymethyl methacrylate lotion of 30% solid contents of 0.5ml is added, stirring fully obtains cathode size.Finally will be described negative
Pole slurry is poured into the sample cavity of the high temperature and pressure filtration apparatus, and teflon membrane filter is provided with the sample cavity,
Subsequent adjusting air valve is simultaneously passed through nitrogen into sample cavity by air inlet, heating mantle is warming up to 80 degree, then 700psi's
The filtrate of approximate clarification is obtained by filtration under pressure.After when continuing insulation and small pressurize about 2, cooling pressure release simultaneously takes out polytetrafluoroethylene (PTFE)
Filter membrane, the flexible lithium ion battery that last obtained black laminated film tears to obtain thickness about 0.15mm from filter membrane is born
Very thin films.
In the present embodiment, in negative electrode of lithium ion battery thin-film process is prepared, used dispersant is guar gum, is adopted
Inorganic solvent is water, and used electrode active material is graphite/nanometer silicon composite material, used conductive additive
For Ke Qinhei, used binding agent is polymethyl methacrylate lotion, and used filtering material is filtered for polytetrafluoroethylene (PTFE)
Film, really, in other embodiments, above-mentioned material can be adjusted according to actual conditions.The protective gas being passed through is nitrogen,
Really, in other embodiments, which can also be other gases such as argon gas or helium.
In the present embodiment, graphite, nano-silicon powder and Ke Qinhei can also be mixed by other effective ways to carry out dusting
Close, such as stirring, shearing, grinding etc., made choice according to actual needs.
Example IV
The shown flexible preparation method without collector battery pole piece prepares lithium-ion electric to the present embodiment according to the present invention
Pond anode thin film.First the xanthans of 0.1g is dissolved in 20ml water, obtains xanthan gum solution.Using high speed ball mill by 4g
Tertiary cathode material-nickle cobalt lithium manganate Li (NiCoMn) O2 powder dusting abundant with the carbon nanotubes of 0.3g and mix to obtain
Mixture, the mixture is added into the xanthan gum solution and high speed dispersion obtains uniform solid-liquid suspension.
The aqueous emulsion of dimethyl polysiloxane fluid of 40% solid contents of 0.5ml is added in the solid-liquid suspension, stirring fully obtains cathode slurry
Material.Finally the anode sizing agent is poured into the sample cavity of the high temperature and pressure filtration apparatus, is provided with the sample cavity
Polyethersulfone membranes, subsequent adjusting air valve are simultaneously passed through nitrogen into sample cavity by air inlet, heating mantle are warming up to 120 degree, with
The filtrate of approximate clarification is obtained by filtration under the pressure of 600psi afterwards.Continue insulation and pressurize about 4 it is small when after, cooling pressure release simultaneously take
Go out polyethersulfone membranes, last obtained black laminated film is torn from filter membrane obtain the flexible lithium of thickness about 0.18mm from
Sub- anode film.
In the present embodiment, in lithium ion cell positive thin-film process is prepared, used dispersant is xanthans, is adopted
Inorganic solvent is water, and used electrode active material is ternary nickle cobalt lithium manganate Li (NiCoMn) O2 powder, is used
Conductive additive be carbon nanotubes, used binding agent is aqueous emulsion of dimethyl polysiloxane fluid, and used filtering material is
Polyethersulfone membranes, really, in other embodiments, above-mentioned material can be adjusted according to actual conditions.The protection gas being passed through
Body is nitrogen, and really, in other embodiments, which can also be other gases such as argon gas or helium.
In the present embodiment, ternary nickle cobalt lithium manganate Li (NiCoMn) O2 powder can also be by other effective with carbon nanotubes
Method carries out dusting mixing, such as stirring, shearing, grinding etc., is made choice according to actual needs.
The invention further relates to a kind of battery (not shown), the battery is by the lithium ion battery plus-negative plate in the present embodiment
Made by film, which can arbitrarily bend, and keep its voltage in 3.6V or so, have that specific capacity is high, stability
It is good, and the characteristic that mechanical flexibility is high.
In the present embodiment, prepared flexibility is lithium ion battery plus-negative plate pole piece without collector battery pole piece, made
Into battery be lithium ion battery, really, in other embodiments, this can prepare different electricity according to the difference of raw material
Pond pole piece and battery.
Comparative examples
The method that this reference examples prepares the li-ion electrode containing collector according to traditional knife coating is born to prepare lithium ion battery
Pole pole piece.First 0.3g binding agents polyvinylidene fluoride (PVDF) is dissolved in 4.5g organic solvents 1-methyl-2-pyrrolidinone (NMP).
0.3g carbon blacks and the 325 mesh graphite powders of 2.4g are added in PVDF solution, high speed dispersion obtains dispersed electrode slurry.
Finally the film dispersion liquid is scratched on copper foil by scraper, heating, drying.Made black laminated film can not be from copper foil
On tear to obtain continuous self-supporting film, and prepared electrode does not possess mechanical flexibility, and preparation process is related to a large amount of organic molten
The use of agent.
In this reference examples, during inorganic/organic hybrid films are prepared, used solvent is N- crassitudes
Ketone, used inorganic powder material are 325 mesh graphite powders and carbon black, and used binding agent is polyvinylidene fluoride
(PVDF), used film-forming method is traditional knife coating, can not obtain the self-supporting for possessing every advantage of the present invention
High packing density is without collector electrode.
In summary：The flexible preparation method without collector battery pole piece of the present invention is by the active material of battery plus-negative plate
Mix, be added to finely dispersed dissolved with being obtained in the aqueous solution or suspension of dispersant in advance with the abundant dusting of conductive additive
Solid-liquid suspension, then finely dispersed electrode slurry is obtained toward addition binding agent in solid-liquid suspension, finally electrode slurry is led to
Cross high-pressure filteration method and suppress to obtain flexibility without collector battery pole piece.The preparation method of the present invention does not have in whole preparation process
Use organic solvent, it is environmentally friendly and avoid producing potential hazard to staff.Meanwhile compared with prior art, this hair
Bright preparation method does not use collector to prepare battery pole piece, greatly reduces manufacturing cost and technology difficulty.
Also, preparation in accordance with the present invention it is obtained it is flexible without collector battery pole piece it is conductive it is good, fill out
Real density is high, electrode active material load capacity is big, and has the advantages that excellent mechanical flexibility and mechanical strength.
And the battery according to made by the flexibility without collector battery pole piece is then good with specific capacity height, stability, and machine
The advantages that tool pliability is high.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, its description is more specific and detailed, but simultaneously
Cannot therefore it be construed as limiting the scope of the patent.It should be pointed out that come for those of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of preparation method of the flexibility without collector battery pole piece, it is characterised in that comprise the following steps：
Electrode slurry is provided, the electrode slurry includes solvent, binding agent, dispersed electrode active material and can select
Select addition or the dispersant or thickener that do not add；
High temperature and pressure filtration treatment is carried out to the electrode slurry, obtains the flexibility without collector battery pole piece.
2. preparation method of the flexibility without collector battery pole piece as claimed in claim 1, it is characterised in that the high temperature and pressure
The condition of filtering includes：Temperature is 0-300 DEG C, is preferably 0-100 DEG C, and pressure is more than 0.1Mpa, is preferably 0.5-8MPa, filters
Hole aperture is not more than 1 μm, is preferably 0.2-0.5 μm.
3. preparation method of the flexibility without collector battery pole piece as claimed in claim 2, it is characterised in that including：In protectiveness
The high temperature and pressure filtration treatment is carried out to the electrode slurry in atmosphere.
4. preparation method of the flexibility without collector battery pole piece as claimed in claim 3, it is characterised in that the high temperature and pressure
The specific steps of filtering include：
The electrode slurry is heated to 0-300 DEG C in protective atmosphere, and is filtered under the pressure of 0.1-10MPa；
Keep temperature and pressure afterwards until after product drying, cool down pressure release and by formation it is flexible without collector battery pole piece with
Filtering material separates.
5. preparation method of the flexibility without collector battery pole piece as claimed in claim 4, it is characterised in that；It is described for being formed
The gas of protective atmosphere includes nitrogen, argon gas or helium；And/or the filtering material includes cellulosic filter paper, polypropylene is filtered
Film, polyethylene filter membrane, nylon leaching film, polyethersulfone membranes, glass fiber filter, polyester filter membrane, Kynoar filter membrane, polytetrafluoro
Ethene filter membrane or ceramic filtration membrane.
6. the flexible preparation method without collector battery pole piece as any one of claim 1-4, it is characterised in that institute
It is water or the cosolvent based on water to state solvent；And/or the electrode active material includes metal salt, metal oxide, gold
Any one in category, non-metal simple-substance, nonmetal oxide or two or more combinations；Preferably, the electrode activity
The particle diameter of material is not more than 0.5mm；And/or the dispersant or thickener include water-soluble biological macromolecule or can be
The surfactant material of micella is formed in aqueous solution；Preferably, the water-soluble biological macromolecule includes guar gum, xanthans
Or carboxymethyl cellulose；And/or the binding agent includes polyacrylic acid and/or its esters, polymethylacrylic acid and/or its ester
Class, polyacrylamide, polymethacrylamide, polyacrylonitrile, polystyrene, acrylonitrile-butadiene rubber latex, SBR emulsion, poly- silicon
Any of oxygen alkane lotion, polyethylene glycol and polyalkylene glycol.
7. preparation method of the flexibility without collector battery pole piece as claimed in claim 1, it is characterised in that the electrode slurry
Further include conductive additive；Preferably, the conductive additive includes conductive carbon black, acetylene black, Ketjen black, carbon nanotubes, stone
Black alkene or metal nanometer line.
8. the flexible preparation method without collector battery pole piece as any one of claim 1-4, it is characterised in that bag
Include：The high temperature and pressure filtration treatment, the high temperature and pressure are carried out to the electrode slurry using high temperature and pressure filtration apparatus
Filtration apparatus includes sample cavity, the heating mantle of outside for being arranged on the sample cavity, the air inlet that is arranged at the top of the sample cavity
Mouthful, the filtering material that is arranged in the sample cavity and be arranged on sample cavity bottom leakage fluid dram, the air inlet and row
Air valve is both provided with liquid mouth.
9. the flexibility obtained by the preparation method as any one of claim 1 to 8 exists without collector battery pole piece, its feature
In the flexibility includes 0-5wt% dispersants, 5-30wt% binding agents and 65-95wt% electrodes without collector battery pole piece
Active material and conductive additive.
10. a kind of battery, it is characterised in that including flexibility as claimed in claim 9 without collector battery pole piece.
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| CN201711191941.8A CN108023057A (en) | 2017-11-24 | 2017-11-24 | Flexibility is without collector battery pole piece, battery and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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