CN106207086A - High power capacity solid lithium ion battery negative material and battery cathode and preparation method thereof - Google Patents
High power capacity solid lithium ion battery negative material and battery cathode and preparation method thereof Download PDFInfo
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- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/628—Inhibitors, e.g. gassing inhibitors, corrosion inhibitors
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
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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
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- H—ELECTRICITY
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- 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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
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Abstract
The invention discloses a kind of high power capacity solid lithium ion battery negative material, be made up of three-dimensional network polymer electrolyte cladding active material, electrical conductivity during three-dimensional network polymer electrolyte solid-state 1 × 10‑3S•cm‑1, activated rear electrical conductivity > and 1 × 10‑2S•cm‑1, lithium ion transference number is tLi +=0.6283.And corresponding battery cathode and preparation method thereof.Electrolyte isolating membrane satisfactory mechanical property of the present invention, it is easy to molding, electrical conductivity is high, and negative material need not use binding agent.The negative electrode active material of conduction high polymer envelope is fixed in polymer dielectric three-dimensional net structure, prevents active material from occurring destruction to come off in charge and discharge process, drastically increases the life-span of this type of lithium ion battery with high energy density.Electrolyte is applicable to industrial mass production with the integral structure of negative active core-shell material.
Description
Technical field
The present invention relates to electrode material technical field, the negative pole material of a kind of high power capacity solid lithium ion battery
Material, and battery cathode and preparation method thereof, particularly relate to a kind of have high ionic conductance, suitable mechanical strength, Gao Rong
Amount, the polymer dielectric/anode material of lithium ion battery of good electrical chemical stability.
Background technology
Lithium ion battery owing to energy density is high, have extended cycle life, the series of advantages such as open-circuit voltage height, safety and stability,
Cause the attention of domestic and international battery industry more and more.Its development and production are the heat subjects of battery industry.
Electrolyte isolating membrane in lithium-ion battery system is electronic body and charge carriers, rises between both positive and negative polarity
The effect of conveying lithium ion.Existing lithium ion battery liquid electrolyte easily leaks, poor safety performance, and gel state electrolyte is difficult
Molding, mechanical performance is weak.Polymer dielectric isolating membrane is owing to having preferable ionic conductivity, light weight, good springiness, easy film forming
Etc. outstanding feature, electrochmical power source light weight, safe efficient, the development trend of environmental protection, therefore becoming are met to a certain extent
Learn a focus of power supply research.
Negative material is a very important part in lithium ion battery, the negative electrode active material that present lithium ion battery is conventional
Material includes carbon, silicon, tin-based oxide, stannic disulfide, molybdenum dioxide, titanium dioxide etc..But these negative materials exist certain
Limitation, as low in graphite theoretical specific capacity, the Novel anode material of high-energy-density exists serious in charge and discharge process
Bulk effect；The intrinsic conduction rate variances such as silicon, tin-based oxide, stannic disulfide, molybdenum dioxide, titanium dioxide, lithium ion diffusibility
Low, the generation cubical expansivity in charge and discharge process is high, and easily rupturable efflorescence makes electrode structure damage, and active substance loses electricity and connects
Touch, ultimately result in the most lower degradation of capacity.
Through retrieval, domestic publication relates to the combined electrode structure in lithium ion battery, such as: application number
201510434711.4 " gel electrolyte lithium ion battery with combination electrode and preparation method thereof "；Application number
" electrode plate of gel polymer lithium ion battery and preparation method thereof " of 200910143465.1, these technology relate to complexity mostly
Flow process, formaldehyde curing agent need to be added, tetrahydrofuran solvent etc. is to health harmful substance, and the diffusion of coating solvents causes monomer
Not exclusively, compound interface destroys in solidification.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, propose a kind of high power capacity solid lithium ion battery negative material, structure is skilful
Wonderful, performance is good.
In order to realize foregoing invention purpose, the present invention provides techniques below scheme: a kind of high power capacity solid lithium ion battery
Negative material, is made up of three-dimensional network polymer electrolyte cladding active material, electricity during three-dimensional network polymer electrolyte solid-state
Conductance > 1 × 10-3S•cm-1, activated rear electrical conductivity > and 1 × 10-2S•cm-1, lithium ion transference number is tLi +=0.6283。
A kind of high power capacity solid lithium ion battery negative pole, including collector substrate, active material and three-dimensional network polymer
Electrolyte, active material cladding collector substrate, three-dimensional network polymer electrolyte cladding active material；Three-dimensional network polymer
Electrical conductivity during electrolyte solid-state > 1 × 10-3S•cm-1, activated rear electrical conductivity > and 1 × 10-2S•cm-1, lithium ion transference number is tLi +=
0.6283。
The preparation method of a kind of high power capacity solid lithium ion battery negative pole described above, comprises the following steps:
(1), by collector substrate be immersed in 30～40% hydrogen peroxide in 3～5 hours, be then washed with deionized clean, from
So dry；
(2), in finely dispersed active material particle, conduction high polymer monomer, acid solution, drip oxidant, be polymerized to obtain gel
Shape product A；
(3), by gel-like product A it is coated on the collector substrate that (1) step dries, obtains negative material B；
(4), in the glove box of applying argon gas by lithium salts electrolyte solution, Nano filling, crystallization inhibitor add Photosensitive monomers with
In the blended monomer that light trigger stirring is formed, ultrasonic vibration, obtain precoating slurry C；
(5), in the glove box of applying argon gas, general's precoating slurry C uniform application, on negative material B, through ultraviolet lighting, obtains high power capacity
Solid lithium ion battery negative pole.
Further, (4) < 10ppm, oxygen divide < 10ppm to step with moisture in step glove box (5).
Further, step (3) on collector substrate coating thickness be 50～200 m.
Further, step (5) middle coating thickness 20～50 m.
Further, step (2) active material particle is nanometer and micron, tin-based oxide nanometer and micron, the dioxy of silicon
Change at least one in titanium nanometer and micron, molybdenum dioxide nanometer and micron, stannic disulfide nanometer and micron particle；Conduction height is poly-
Thing monomer is one or both that have in aniline, pyrroles, thiophene-structure；Acid is the one in phytic acid, oxalic acid, acetic acid, hydrochloric acid
Or two kinds；Oxidant is one or both in Ammonium persulfate., ferric chloride, potassium permanganate.
Further, step (2) in, the quality hundred of active material particle, conduction high polymer monomer, acid solution and oxidant
Point content is respectively 60%～85%, 15%～20%, 0.5%～3% and 0.5%～2%.
Further, step (4) in, lithium salts, lithium salts solvent, Photosensitive monomers, light trigger, Nano filling, crystallization suppression
The weight/mass percentage composition of agent is respectively 0.1%～15%, 2%～25%, 10%～80%, 0.1%～4%, 0.1%～3% and 0.1%～2%.
Further, collector substrate is the one of Copper Foil, copper mesh, nickel screen and aluminium foil, thickness 5～50 μm.
Compared with prior art, the invention have the advantages that active material integrally curing at polymer dielectric
In network structure, prevent electrode active material particles from occurring destruction to come off in charge and discharge process, drastically increase this and birds of the same feather flock together
The life-span of polymer electrolyte lithium ion battery.
Utilize polymer dielectric can be directly used as solid electrolyte, play the dual function of electrolyte and isolating membrane, press down
The growth of Li dendrite processed, alleviates and even eliminates the chemical reaction between electrolyte and battery material, reduce liquid state electrolyte battery
In fluid seepage, there is not potential safety hazard in applied at elevated temperature, pliability is good, it is simple to prepares variously-shaped battery.Negative material
Three-dimensional porous conducting polymer parent can not only provide swift electron and ion transmission channel, and can follow for active material particle
During ring, volumetric expansion provides space.Under the dual function of conduction high polymer and collection liquid surface group, active substance with
Copper Foil adhesion is high, capacity is high, cycle performance is excellent.Negative material integrally curing in the network structure of polymer dielectric,
Prevent from electrode active material particles from destroying in charge and discharge process to come off, eliminate grinding, the operation such as sieve, drastically increase
The life-span of this type of polymer electrolyte lithium-ion battery.And the solvent in electrode active material preparation process is water, environmental protection
Low cost, it is easy to large-scale industrial production.
High power capacity solid lithium ion battery negative material of the present invention and pure lithium assemble 100 charge and discharge cycles of button cell it
After, specific discharge capacity still keeps 1400mAh/g, it is shown that excellent capacitance and good cycle performance, can be widely applied to
Lithium rechargeable battery.
The synthetic method of the present invention, technological operation is simple, good stability, cost-effective, and environmental protection does not exists under high temperature
Potential safety hazard, pliability is good, can be widely applied to the large-scale industrial production of lithium rechargeable battery.
Accompanying drawing explanation
Fig. 1 is the enlarged section of negative material；
Fig. 2 is the charge and discharge cycles schematic diagram of high power capacity solid lithium ion battery negative material.
Detailed description of the invention
Describing the present invention below in conjunction with embodiment, the description of this part is only exemplary and explanatory, no
Reply protection scope of the present invention has any restriction effect.
A kind of high power capacity solid lithium ion battery negative material, is coated with active material structure by three-dimensional network polymer electrolyte
Become, electrical conductivity during three-dimensional network polymer electrolyte solid-state 1 × 10-3S•cm-1, activated rear electrical conductivity > and 1 × 10-2S•cm-1,
Lithium ion transference number is tLi +=0.6283。
A kind of high power capacity solid lithium ion battery negative pole, including collector substrate, active material and three-dimensional network polymer
Electrolyte, active material cladding collector substrate, three-dimensional network polymer electrolyte cladding active material；Three-dimensional network polymer
Electrical conductivity during electrolyte solid-state > 1 × 10-3S•cm-1, activated rear electrical conductivity > and 1 × 10-2S•cm-1, lithium ion transference number is tLi +=
0.6283。
The preparation method of above-mentioned high power capacity solid lithium ion battery negative pole, comprises the following steps:
(1), by collector substrate be immersed in 30～40% hydrogen peroxide in 3～5 hours, be then washed with deionized clean, from
So dry；
(2), in finely dispersed active material particle, conduction high polymer monomer, acid solution, drip oxidant, be polymerized to obtain gel
Shape product A；
Active material particle is nanometer and micron, tin-based oxide nanometer and micron, nano titania and micron, the dioxy of silicon
Change at least one in molybdenum nanometer and micron, stannic disulfide nanometer and micron particle；Conduction high polymer monomer is for having aniline, pyrrole
Cough up, one or both in thiophene-structure；Acid is one or both in phytic acid, oxalic acid, acetic acid, hydrochloric acid；Oxidant is over cure
Acid ammonium, ferric chloride, potassium permanganate in one or both.
(3), by gel-like product A it is coated on the collector substrate that (1) step dries, obtains negative material B；
Gel-like product coating device is coated on the collector substrate after hydrogen peroxide processes uniformly, is vacuum dried place of colding pressing
Reason, under the three-dimensional net structure and collection liquid surface functional group dual function of conduction high polymer formation, active particle will be firmly
Envelope on a current collector, prepare carry bond effect exempt from binding agent negative material B.
Negative material B is provided that swift electron and ion transmission channel, can be active material particle body in cyclic process
Long-pending expansion provides space, with Copper Foil adhesion height, capacity is high, cycle performance is excellent, environmental protection low cost, it is easy to give birth on a large scale
Produce.
(4), in the glove box of applying argon gas, lithium salts electrolyte solution, Nano filling, crystallization inhibitor are added heliosensitivity list
In the blended monomer that body and light trigger stirring are formed, ultrasonic vibration, obtain precoating slurry C；
Lithium salts electrolyte solution mixing time 5～12 hours in anhydrous and oxygen-free environment, whipping temp is room temperature, concentration be 5～
50g/L；Monomer mixing time 0.5～2 hour, whipping temp 20～25 degree are blended；The precoating slurry ultrasonic vibration time 0.5～3
Hour, ultrasonic power 200～500 watts；Ultraviolet lighting power 250～600 watts, light application time 2～60 minutes.
In precoating slurry C, lithium salts is selected from lithium perchlorate, LiBF4, lithium hexafluoro phosphate, hexafluoroarsenate lithium, trifluoromethyl
One or more of Sulfonic Lithium or double trifluoromethanesulfonimide lithium；Lithium salts solvent is selected from Allyl carbonate, ethylene carbonate, carbon
Diethyl phthalate, dimethyl carbonate, methyl ethyl ester, dioctyl phthalate, ethylene dicyanide one or more；Heliosensitivity
Monomer is polyethyleneglycol diacrylate, ethoxyquin trimethylolpropane trimethacrylate, aliphatic polyurethane triacrylate
Multiple；Light trigger is TPO, one or more in benzoin dimethylether, 1-hydroxy-cyclohexyl phenyl ketone；Nano filling
For Al2O3、TiO2、SiO2, one or more in CNT；Crystallization inhibitor is N,N methylene bis acrylamide, ethylene
The mixing of base three (2-methoxy ethoxy) silane.
(5), in the glove box of applying argon gas, general's precoating slurry C uniform application, on negative material B, through ultraviolet lighting, obtains high
Capacity solid lithium ion battery negative pole.
Compared with being once coated with simple physical mixed and multilamellar, the present invention is in the polymerization process of conduction high polymer
By negative active core-shell material add, negative active core-shell material by conduction high polymer three-dimensional network envelope on negative current collector.In conduction
High polymer, with under the dual function of collection liquid surface group, is prepared the negative material exempting from binding agent, is handed over by ultraviolet light irradiation
Connection, by negative material integrally curing in the network structure of polymer dielectric.The storage lithium performance gains of present invention excellence is in three
Dimension porous conductive polymer parent, and the composite construction of polymer dielectric and negative material, this structure can not only provide fast
Speed electronics and ion transmission channel, and space can be provided for active material particle volumetric expansion in cyclic process.
Embodiment 1
(1) taking the stannic disulfide that 0.95g particle diameter is 1～2 m, 0.8g pyrroles's ultrasonic vibration is dispersed in planting of 40ml pH=4
In acid solution.In above-mentioned mixed liquor, dropwise drip the Ammonium persulfate. of 10ml 0.125M, obtain after 300 watts of ultrasonic vibration 15min
The gelatinous stannic disulfide of black/polythiophene mixed slurry.Mixed slurry is coated uniformly on the Copper Foil after 35% hydrogen peroxide dipping
On, coating thickness 150 m, 40 degree of vacuum drying 24h obtain negative material；(2) in the glove box of applying argon gas (moisture < 10ppm,
Oxygen divide < 10ppm), taking appropriate hexafluoroarsenate lithium is dissolved in dimethyl carbonate: in mixed solvent Allyl carbonate=1:0.6(wt%),
12h is stirred at room temperature, obtains the electrolyte solution that concentration is 1M；(3) 3.2g polyethyleneglycol diacrylate, 2.8g aliphatic poly ammonia are taken
Ester triacrylate and 4.5g ethoxyquin trimethylolpropane trimethacrylate, add 0.02g benzoin dimethylether, 0.015g
TPO, is stirred at room temperature 30min, obtains blended monomer；(4) under anhydrous and oxygen-free environment in blended monomer add 4g electrolyte solution,
0.15g nanometer Al2O3, 0.15g vinyl three (2-methoxy ethoxy) silane, 300 watts of ultrasonic 30min, obtain precoating electrolyte
Slurry.Precoating electrolyte slurry is coated uniformly on negative material, coating thickness 100 m, 250W ultraviolet source irradiation 5 points
Clock, obtains polymer dielectric/anode material.Test this composite and assemble button cell capacitance with pure lithium, follow for 100 times
Ring specific discharge capacity is 660 mAh/g.
Embodiment 2
(1) taking the nanometer glass putty that 0.8g particle diameter is 100～300nm, 0.65g aniline ultrasonic vibration is dispersed in 40ml pH=4
Oxalic acid solution in.The Ammonium persulfate. of 10ml 0.125M, 300 watts of ultrasonic vibration 15min are dropwise dripped in above-mentioned mixed liquor
After obtain the gelatinous stannum of brown-green/polyaniline mixed slurry.Mixed slurry is coated uniformly on the copper after 35% hydrogen peroxide dipping
On paper tinsel, coating thickness 150 μm, 40 degree of vacuum drying 24h obtain negative material；(2) in the glove box of applying argon gas (moisture <
10ppm, oxygen divide < 10ppm), taking appropriate lithium hexafluoro phosphate is dissolved in dimethyl carbonate: mixed solvent ethylene dicyanide=1:1.5(wt%)
In, 12h is stirred at room temperature, obtains the electrolyte solution that concentration is 1M；(3) 6.5g polyethyleneglycol diacrylate and 3.5g ethoxyquin are taken
Trimethylolpropane trimethacrylate, adds 0.015g benzoin dimethylether, 0.01g TPO, 30min is stirred at room temperature, obtains blended
Monomer；(4) in blended monomer, 2.5g electrolyte solution, 0.1g SiO are added under anhydrous and oxygen-free environment2, 0.08g vinyl three
(2-methoxy ethoxy) silane, 300 watts of ultrasonic 30min, obtain precoating electrolyte slurry.Precoating electrolyte slurry is uniformly coated
On negative material, coating thickness 100 μm, 250W ultraviolet source irradiation 5 minutes, obtain polymer dielectric/anode material.
Testing this composite and assemble button cell capacitance with pure lithium, 100 times circulation specific discharge capacity is 870mAh/g.
Embodiment 3
(1) taking the nanometer titanium dioxide molybdenum that 1.2g particle diameter is 100～500nm, 1.5g thiophene ultrasonic vibration is dispersed in 40ml pH
In the hydrochloric acid solution of=4.The liquor ferri trichloridi of 10ml 0.105M, 300 watts of ultrasonic vibration are dropwise dripped in above-mentioned mixed liquor
The gelatinous molybdenum dioxide of brown/polythiophene mixed slurry is obtained after 15min.Mixed slurry is coated uniformly on 35% hydrogen peroxide
On Copper Foil after immersion, coating thickness 150 μm, 40 degree of vacuum drying 24h obtain negative material；(2) in the glove box of applying argon gas
(moisture < and 10ppm, oxygen divide < 10ppm), take appropriate LiBF4 and be dissolved in dimethyl carbonate: ethylene carbonate=1:1.45
(wt%) in mixed solvent, 12h is stirred at room temperature, obtains the electrolyte solution that concentration is 1.2 M；(3) 4g aliphatic polyurethane three is taken
Acrylate and 6.5g ethoxyquin trimethylolpropane trimethacrylate, addition 0.015g benzoin dimethylether, 0.01g TPO,
30min is stirred at room temperature, obtains blended monomer；(4) in blended monomer, 3g electrolyte solution, 0.1g are added under anhydrous and oxygen-free environment
CNT, 0.1g vinyl three (2-methoxy ethoxy) silane, 300 watts of ultrasonic 30min, obtain precoating electrolyte slurry.Will
Precoating electrolyte slurry is coated uniformly on negative material, coating thickness 100 μm, and 250W ultraviolet source irradiation 5 minutes obtains polymerization
Thing electrolyte/anode material.Test this composite and assemble button cell capacitance, 100 circulation electric discharge ratios with pure lithium
Capacity is 1060mAh/g.
Embodiment 4
(1) taking the nano silica fume that 1g particle diameter is 50～200nm, 0.8g pyrroles's ultrasonic vibration is dispersed in the salt of 40ml pH=4
In acid solution.In above-mentioned mixed liquor, dropwise drip the Ammonium persulfate. of 10ml 0.125M, obtain after 300 watts of ultrasonic vibration 15min
The gelatinous silicon of black/polypyrrole mixed slurry.Mixed slurry is coated uniformly on the Copper Foil after 35% hydrogen peroxide dipping, is coated with
Film thickness 150 μm, 40 degree of vacuum drying 24h obtain negative material；(2) in the glove box of applying argon gas (moisture < and 10ppm, oxygen divide <
10ppm), taking appropriate lithium perchlorate is dissolved in Allyl carbonate: in mixed solvent ethylene carbonate=1:1(wt%), be stirred at room temperature
12h, obtains the electrolyte solution that concentration is 1.2 M；(3) 6g polyethyleneglycol diacrylate and 2.5g aliphatic polyurethane 3 third are taken
Olefin(e) acid ester, adds 0.015g benzoin dimethylether, 0.01g TPO, 30min is stirred at room temperature, obtains blended monomer；(4) anhydrous and oxygen-free
In blended monomer, 2.6g electrolyte solution, 0.16g TiO is added under environment2, 0.05g N,N methylene bis acrylamide,
300 watts of ultrasonic 30min, obtain precoating electrolyte slurry.Precoating electrolyte slurry is coated uniformly on negative material, coating thickness
100 μm, 250W ultraviolet source irradiation 5 minutes, obtain polymer dielectric/anode material.Test this composite and pure lithium
Assembling button cell capacitance, 100 times circulation specific discharge capacity is 1400mAh/g.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For Yuan, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. a high power capacity solid lithium ion battery negative material, it is characterised in that: it is coated with by three-dimensional network polymer electrolyte
Active material is constituted, electrical conductivity during three-dimensional network polymer electrolyte solid-state > 1 × 10-3S•cm-1, activated rear electrical conductivity > 1 ×
10-2S•cm-1, lithium ion transference number is tLi +=0.6283。
2. a high power capacity solid lithium ion battery negative pole, it is characterised in that: include collector substrate, active material and three dimensional network
Shaped polymer electrolyte, active material cladding collector substrate, three-dimensional network polymer electrolyte cladding active material；Three dimensional network
Electrical conductivity during shaped polymer electrolyte solid-state > 1 × 10-3S•cm-1, activated rear electrical conductivity > and 1 × 10-2S•cm-1, lithium ion mobility
Number is tLi +=0.6283。
3. the preparation method of a high power capacity solid lithium ion battery negative pole as claimed in claim 2, it is characterised in that: include with
Lower step:
(1), by collector substrate be immersed in 30～40% hydrogen peroxide in 3～5 hours, be then washed with deionized clean, from
So dry；
(2), in finely dispersed active material particle, conduction high polymer monomer, acid solution, drip oxidant, be polymerized to obtain gel
Shape product A；
(3), by gel-like product A it is coated on the collector substrate that (1) step dries, obtains negative material B；
(4), in the glove box of applying argon gas by lithium salts electrolyte solution, Nano filling, crystallization inhibitor add Photosensitive monomers with
In the blended monomer that light trigger stirring is formed, ultrasonic vibration, obtain precoating slurry C；
(5), in the glove box of applying argon gas, general's precoating slurry C uniform application, on negative material B, through ultraviolet lighting, obtains high power capacity
Solid lithium ion battery negative pole.
4. as claimed in claim 3 preparation method, it is characterised in that: step (4) with moisture in step glove box (5) < 10ppm,
Oxygen divides < 10ppm.
5. as claimed in claim 3 preparation method, it is characterised in that: step (3) on collector substrate coating thickness be 50～
200µm。
6. preparation method as claimed in claim 3, it is characterised in that: step (5) middle coating thickness 20～50 m.
7. as claimed in claim 3 preparation method, it is characterised in that: step (2) active material particle be the nanometer of silicon and micron,
Tin-based oxide nanometer and micron, nano titania and micron, molybdenum dioxide nanometer and micron, stannic disulfide nanometer and micron
At least one in granule；Conduction high polymer monomer is one or both that have in aniline, pyrroles, thiophene-structure；Acid is for planting
One or both in acid, oxalic acid, acetic acid, hydrochloric acid；Oxidant be the one in Ammonium persulfate., ferric chloride, potassium permanganate or
Two kinds.
8. as claimed in claim 3 preparation method, it is characterised in that: step (2) in, active material particle, conduction high polymer list
The weight/mass percentage composition of body, acid solution and oxidant is respectively 60%～85%, 15%～20%, 0.5%～3% and 0.5%～2%.
9. as claimed in claim 3 preparation method, it is characterised in that: step (4) in, lithium salts, lithium salts solvent, Photosensitive monomers, light
Initiator, Nano filling, the weight/mass percentage composition of crystallization inhibitor be respectively 0.1%～15%, 2%～25%, 10%～80%, 0.1%
～4%, 0.1%～3% and 0.1%～2%.
10. preparation method as claimed in claim 3, it is characterised in that: collector substrate is Copper Foil, copper mesh, nickel screen and aluminium foil
One, thickness 5～50 μm.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108063216A (en) * | 2017-11-27 | 2018-05-22 | 浙江衡远新能源科技有限公司 | A kind of lithium battery cathode pole piece and preparation method thereof |
| CN108110324A (en) * | 2017-11-17 | 2018-06-01 | 中国科学院深圳先进技术研究院 | A kind of preparation method of solid lithium ion battery |
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