CN104037450A - Gel-state polymer lithium ion battery and preparation method thereof - Google Patents
Gel-state polymer lithium ion battery and preparation method thereof Download PDFInfo
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- CN104037450A CN104037450A CN201410208970.0A CN201410208970A CN104037450A CN 104037450 A CN104037450 A CN 104037450A CN 201410208970 A CN201410208970 A CN 201410208970A CN 104037450 A CN104037450 A CN 104037450A
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0565—Polymeric materials, e.g. gel-type or solid-type
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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
- 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
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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
- H01M10/00—Secondary cells; Manufacture thereof
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- H01M10/058—Construction or 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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/44—Fibrous material
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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
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
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- 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
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- 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
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- 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses a gel-state polymer lithium ion battery and a preparation method thereof. A membrane in the battery is overlapped by cellular structures formed by multilayer superfine fibers: polyethylene terephthalate, through the three-dimensional structure, the aperture of a straight-through hole is reduced, so that the passing of small particles is effectively blocked without influencing the passing of organic ions, and penetration of lithium dendrites is avoided. Furthermore, a plasticizer is not required in a battery production process of the gel-state polymer lithium ion battery, so that application of a large amount of flammable organic compounds is avoided, the production difficulty is reduced, and the production safety is improved. The gel-state polymer lithium ion battery and the preparation method thereof can be applied to the field of batteries.
Description
Technical field
The present invention relates to a kind of lithium ion battery and preparation method thereof, more particularly, the present invention relates to a kind of gel polymer lithium ion battery and preparation method thereof.
Background technology
In recent years, along with the portable electric appts such as scientific and technological development, mobile phone and notebook computer are universal rapidly in the world, hindering these equipment is exactly its power supply to a critical component of miniaturization, lighting, durableization development.What these power supplys generally adopted at present is organic liquid electrolyte lithium-ion battery, but because this class battery contains mobile liquid state organics, thereby exist such as the potential safety hazard such as internal short-circuit of battery, electrolyte leakage.And jelly glue polymer battery can address these problems well, and more flexible in the design of battery appearance, can improve the capacity density of battery, the useful life that increases battery, expansion range of application.
But jelly glue polymer battery requires barrier film to have good absorbent.And the long-time high magnification work of lithium ion battery, needs electrolyte ion entry/leave fast, and barrier film, as the critical material in battery, need to ensure the migration of ion, and porosity is higher, the resistance of ion migration is fewer.The micropore of this class barrier film is mutually to connect simultaneously, molecule in battery assembling process is unavoidably brought into, and the long-time use of lithium battery easily forms Li dendrite, and this granule easily causes micro-short circuit, affect Capacitance reserve ability and the useful life of lithium ion battery.
And jelly glue polymer battery needs to use a large amount of inflammable organic compounds to extract plasticizer in process of production, has increased the difficulty of large-scale production, has increased the ashamed cost of system, has extended the production cycle, and has had potential safety hazard.
Therefore, prior art awaits improving and development.
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiencies in the prior art, the gel polymer lithium ion battery that a kind of manufacture craft is simple, cost of manufacture is low and with short production cycle is provided and prepares the method for this battery.
The technical scheme that a kind of gel polymer lithium ion battery of the present invention adopts is: this battery comprises aluminum plastic film and naked battery core, described naked battery core is reeled and is made by anode pole piece, barrier film and cathode pole piece, described naked battery core is arranged on the aluminum plastic film inside of sealing, this battery also comprises gel polymer electrolyte, described gel polymer electrolyte is arranged in described aluminum plastic film, and described naked battery core is fixed in gel polymer electrolyte.
Further, described gel polymer electrolyte is by the electrolyte in aluminum plastic film be coated on acrylate monomer on crosslinking agent and anode pole piece and the cathode pole piece of two, barrier film and thermal initiator generation thermal polymerization cross-linking reaction and gelation reaction form.
Further, described thermal initiator is azodiisobutyronitrile, dibenzoyl peroxide and/or dilauroyl peroxide.
The technical scheme that the preparation method of a kind of gel polymer lithium ion battery of the present invention adopts is that the method comprises the following steps:
A. prepare monomer solution: methyl methacrylate and thermal initiator are fully dissolved in 1-METHYLPYRROLIDONE or isopropyl alcohol, and the quality of thermal initiator is 0.1～5% of methyl methacrylate quality, obtains monomer solution, and stores under cryogenic conditions;
B. anode sizing agent preparation and anode pole piece are made: Kynoar, 1-METHYLPYRROLIDONE and conductive agent are stirred, after fully dissolving, add lithium manganese oxide, after stirring, then add monomer solution, continue to stir, mixing time is 10～400 minutes; Obtain anode sizing agent, anode sizing agent is coated on aluminium foil equably, toast at a certain temperature, obtain anode pole piece;
C. cathode size preparation and cathode pole piece are made: Kynoar, 1-METHYLPYRROLIDONE and conductive agent are stirred, after fully dissolving, add negative electrode active material, after stirring, add monomer solution again, continue to stir, mixing time is 10～400 minutes, obtain cathode size, cathode size is coated on Copper Foil equably, toasts at a certain temperature, obtain cathode pole piece;
D. barrier film gluing: Kynoar one hexafluoropropylene is dissolved in organic solvent, adds crosslinking agent polyethyleneglycol diacrylate, make polymer glue after fully dissolving, this polymer glue is coated in equably to two sides the drying and processing of barrier film;
E. battery assembling and reprocessing: the barrier film of above-mentioned anode pole piece, oven dry and cathode pole piece are made to naked battery core by coiling, after aluminum plastic film packaging note electrolyte, seal by heat sealing machine surrounding, then under uniform temperature, pressure and time, make acrylate monomer, thermal initiator, crosslinking agent and electrolyte generation thermal polymerization cross-linking reaction and gelation reaction, form gel polymer electrolyte;
F. by gel polymer electrolyte through preliminary filling, bleed, continuous filling with aging step can make gel polymer lithium ion battery finished product;
The microcellular structure that barrier film described in step D is made up of multilayer superfine fibre PETG is formed by stacking, staggered between levels micropore, forms the bent hole connecting in battery diaphragm.
Further, in step D, the average pore size scope of the individual layer of the multi-layer microporous structure of the barrier film of described lithium ion battery or superficial layer micropore is 0. 5-3.5 μ m, and the transparent effect aperture of staggered micropore under vertical perspective is less than 50nm layer by layer.
Further, microcellular structure (11), microcellular structure (22) and microcellular structure (33) stack that barrier film described in step D is made up of three layer superfine fibres form, staggered between levels micropore, form the bent hole connecting in battery diaphragm.
Further, in described step B and step C, the stirring of described anode sizing agent, cathode size is all carried out in reactor, and temperature in the kettle is not higher than 35 DEG C, and baking temperature is not higher than 60 DEG C.
Further, described in described step B, in monomer solution, the quality of acrylic monomers accounts for 0.1～10% of anode sizing agent dry powder gross mass, and described in described step C, in monomer solution, the quality of acrylic monomers is 0. 1～10% of cathode size dry powder gross mass.
Further, in described step e, thermal polymerization cross-linking reaction and gelation reaction are to be 65～120 DEG C in temperature, under the condition that pressure is 0.15～0.45MPa, carry out, and the reaction time is 2～200 minutes.
The invention has the beneficial effects as follows: the gel polymer electrolyte in the present invention has the polymer network structure of two and three dimensions, liquid electrolyte is fixed in polymer network structure, this gel electrolyte is except playing the effect of electrolyte, also play the effect of bonding agent, together with glue by positive plate, barrier film and negative plate are more closely sticked together, make battery body form a high-intensity entirety, electrolyte is fixed between barrier film and active material simultaneously, shorten the distance of lithium ion motion, reduce the interface resistance of battery, thereby improve the mechanical strength of Soft Roll polymer Li-ion battery, chemical property and security performance.The porosity of battery diaphragm is up to 90%, and imbibition ability and liquid-keeping property are good, is suitable as all solid state gel polymer lithium ion battery barrier film; In addition, thereby owing to not needing to use plasticizer to avoid using a large amount of inflammable organic compounds, reduce production difficulty in battery manufacturing process of the present invention, improved production security.
Brief description of the drawings
Fig. 1 is the reaction equation of cross-linking reaction in gel polymer lithium ion battery manufacture method of the present invention;
Fig. 2 is the schematic diagram of three layers of microporous layers stack of described barrier film;
Fig. 3 is surface holes and the transparent effect hole schematic diagram of described barrier film, and wherein 1 is surperficial macropore, the 2nd, and transparent effect hole.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
embodiment mono-:
(1) anode sizing agent preparation and anode pole piece are made
Be produced in reactor and complete, control temperature in the kettle not higher than 35 DEG C, 3 grams of Kynoar (hereinafter to be referred as PVDF) and 2 grams of conductive carbon blacks are fully dissolved in 1-METHYLPYRROLIDONE (hereinafter to be referred as NMP).Add 95 grams of cobalts acid lithiums, stir about, after 2 hours, adds the nmp solution that contains 8 grams of methyl methacrylates and 0.1 gram of azodiisobutyronitrile again, then continuous stirring approximately 300 minutes.To meet the requirements of anode sizing agent coats on aluminium foil and at 60 DEG C baking and can obtain desired anode pole piece.
(2) cathode size preparation and cathode pole piece are made
Be produced in reactor and complete, control temperature in the kettle not higher than 35 DEG C, 3 shell PVDF and 2 grams of conductive carbon blacks are fully dissolved in NMP.Add 95 grams of native graphites, stir about, after 2 hours, adds the nmp solution that contains 8 grams of methyl methacrylates and 0.1 gram of azodiisobutyronitrile again, then continuous stirring approximately 300 minutes.To meet the requirements of cathode size coats on Copper Foil and at 60 DEG C baking and can obtain desired cathode pole piece.
(3) barrier film gluing
4 grams of Kynoar one hexafluoropropylenes (hereinafter to be referred as PVDF-HFP) (molecular weight 400,000) are first dissolved in the mixed solvent of 92 grams of NMP and acetone, add again 4 grams of polyethylene glycol dimethacrylates (molecular weight 300), after fully dissolving, can make polymer glue.This polymer glue is coated in equably to the two sides of barrier film, for subsequent use after drying.
The preparation method of described lithium ion battery separator is: polymer solution preparation is become to Electrospun solution, and under high voltage electric field effect, electrospinning processing obtains the microporous barrier of multilayer ultra-fine fiber construction; Or polymer melting is become to melt, under high voltage electric field effect, obtain the microporous barrier of multilayer ultra-fine fiber construction; The microporous barrier of the multilayer ultra-fine fiber construction then collection being obtained is processed or heat treatment through desolventizing, obtains the bent hole of the multi-level 3 D stereo superfine fibre battery diaphragm that stable ultra-fine fiber construction forms.
Described polymer can be selected from one or more the mixture in polyacrylonitrile, polyamide, PETG, polyparaphenylene Ben Bing bis-oxazole, PAEK, polyimides, polyvinyl alcohol or Kynoar.
The bent pore structure of this 3 D stereo, one side can increase substantially imbibition ability and the liquid-keeping property of barrier film; Reduced on the other hand the aperture of clear opening, thus do not affect organic ion by effectively stopped passing through of molecule, and avoid Li dendrite to penetrate.
(4) battery assembling and reprocessing:
Above-mentioned anode pole piece, barrier film and cathode pole piece are made to naked battery core by coiling, after the fluid injection of aluminum plastic film packaging, packaging film surrounding is sealed with heat sealing machine.Under room temperature, shelving after 20 hours, is being 70 DEG C when temperature, and pressure is 0.25kgf/cm
2, when pressure is 0.25MPa, make in battery core each material hot polymerization and approximately 180 minutes, wherein, acrylate monomer, initator, crosslinking agent and electrolyte generation thermal polymerization cross-linking reaction and gelation reaction, the reaction equation of its cross-linking reaction is as shown in Figure l.In reaction equation, compd A is acrylate monomer, and compd B is crosslinking agent polyethylene glycol acrylate, and Compound C is cross-linking reaction product, and initator is thermal initiator.R1, R2, R3 and R4 be hydrogen or alkanes Guan Neng garden as methyl, ethyl, propyl group, butyl, benzyl, iso-octyl etc., R1, R2, R3 and R4 can be that same functional group can be also different functional group.Again through preliminary filling, bleed, continuous filling with aging etc. can make finished product battery.
embodiment bis-:
(1) anode sizing agent preparation and anode pole piece are made
Be produced in reactor and complete, control temperature in the kettle not higher than 35 DEG C, 3 grams of PVDF and 2 grams of conductive carbon blacks are fully dissolved in NMP.Add 95 grams of cobalts acid lithiums, stir about, after 2 hours, adds the nmp solution that contains 6 grams of methyl methacrylates and 0.12 gram of azodiisobutyronitrile again, then continuous stirring approximately 270 minutes.To meet the requirements of anode sizing agent coats on aluminium foil and at 60 DEG C baking and can obtain desired anode pole piece.
(2) cathode size preparation and cathode pole piece are made
Be produced in reactor and complete, control temperature in the kettle not higher than 35 DEG C, 3 grams of PVDF and 2 grams of conductive carbon blacks are fully dissolved in NMP.Add 95 grams of native graphites, stir about, after 2 hours, adds the nmp solution that contains 6 grams of methyl methacrylates and 0.12 gram of azodiisobutyronitrile again, then continuous stirring approximately 270 minutes.To meet the requirements of cathode size coats on Copper Foil and at 60 DEG C baking and can obtain desired cathode pole piece.
(3) barrier film gluing
By 4 grams of PVDF-HFP(molecular weight 400,000) be first dissolved in the mixed solvent of 92.5 grams of ethylene carbonates and acetone, then add 3.5 grams of polyethylene glycol dimethacrylates (molecular weight 800), after fully dissolving, can make polymer glue.This polymer glue is coated in equably to the two sides of barrier film, for subsequent use after drying.
(4) battery assembling and reprocessing:
Above-mentioned anode pole piece, barrier film and cathode pole piece are made to naked battery core by coiling, after the fluid injection of aluminum plastic film packaging, packaging film surrounding is sealed with heat sealing machine.Under room temperature, shelve after 20 hours, it is being 75 DEG C when temperature, pressure is that 0.35kgf/cm2. is that pressure is while being 0.35MPa, make in battery core each material hot polymerization and approximately 150 minutes, wherein, acrylate monomer, initator, crosslinking agent and electrolyte generation thermal polymerization cross-linking reaction and gelation reaction, the reaction equation of its cross-linking reaction as shown in Figure l.In reaction equation, compd A is acrylate monomer, and compd B is crosslinking agent polyethylene glycol acrylate, and Compound C is cross-linking reaction product, and initator is thermal initiator.R1, R2, R3 and R4 be hydrogen or alkanes functional group as methyl, ethyl, propyl group, butyl, benzyl, iso-octyl etc., R1, R2, R3 and R4 can be that same functional group can be also different functional group.Again through preliminary filling, bleed, continuous filling with aging etc. can make finished product battery.
The battery that embodiment mono-and embodiment bis-are made carries out performance test, and test result is as shown in table 1.
Chemical property and the security performance of the gel polymer lithium ion battery that as can be known from the table data, the present invention obtains are good.
The performance test results of table 1 gel polymer lithium ion battery
The present invention can be applicable to field of batteries.
It should be noted that, above-mentionedly only describe the present invention with preferred embodiment, can not limit to interest field of the present invention at this point, therefore in the situation that not departing from inventive concept, the equivalence that the content of all utilizations specification of the present invention and accompanying drawing part is carried out changes, and all reason is with being included within the scope of claim of the present invention.
Claims (9)
1. a gel polymer lithium ion battery, this battery comprises aluminum plastic film and naked battery core, described naked battery core is reeled and is made by anode pole piece, barrier film and cathode pole piece, described naked battery core is arranged on the aluminum plastic film inside of sealing, it is characterized in that: this battery also comprises gel polymer electrolyte, described gel polymer electrolyte is arranged in described aluminum plastic film, and described naked battery core is fixed in gel polymer electrolyte.
2. a kind of gel polymer lithium ion battery according to claim 1, is characterized in that: described gel polymer electrolyte is by the electrolyte in aluminum plastic film and be coated on acrylate monomer on crosslinking agent and anode pole piece and the cathode pole piece of two, barrier film and thermal initiator generation thermal polymerization cross-linking reaction and gelation reaction form.
3. a kind of gel polymer lithium ion battery according to claim 2, is characterized in that: described thermal initiator is azodiisobutyronitrile, dibenzoyl peroxide and/or dilauroyl peroxide.
4. a preparation method for a kind of gel polymer lithium ion battery as claimed in claim 1, the method comprises the following steps:
A. prepare monomer solution: methyl methacrylate and thermal initiator are fully dissolved in 1-METHYLPYRROLIDONE or isopropyl alcohol, and the quality of thermal initiator is 0.1～5% of methyl methacrylate quality, obtains monomer solution, and stores under cryogenic conditions;
B. anode sizing agent preparation and anode pole piece are made: Kynoar, 1-METHYLPYRROLIDONE and conductive agent are stirred; after fully dissolving, add lithium manganese oxide, after stirring, then add monomer solution; continue to stir, mixing time is 10～400 minutes; Obtain anode sizing agent, anode sizing agent is coated on aluminium foil equably, toast at a certain temperature, obtain anode pole piece;
C. cathode size preparation and cathode pole piece are made: Kynoar, 1-METHYLPYRROLIDONE and conductive agent are stirred, after fully dissolving, add negative electrode active material, after stirring, add monomer solution again, continue to stir, mixing time is 10～400 minutes, obtain cathode size, cathode size is coated on Copper Foil equably, toasts at a certain temperature, obtain cathode pole piece;
D. barrier film gluing: Kynoar one hexafluoropropylene is dissolved in organic solvent, adds crosslinking agent polyethyleneglycol diacrylate, make polymer glue after fully dissolving, this polymer glue is coated in equably to two sides the drying and processing of barrier film;
E. battery assembling and reprocessing: the barrier film of above-mentioned anode pole piece, oven dry and cathode pole piece are made to naked battery core by coiling, after aluminum plastic film packaging note electrolyte, seal by heat sealing machine surrounding, then under uniform temperature, pressure and time, make acrylate monomer, thermal initiator, crosslinking agent and electrolyte generation thermal polymerization cross-linking reaction and gelation reaction, form gel polymer electrolyte;
F. by gel polymer electrolyte through preliminary filling, bleed, continuous filling with aging step can make gel polymer lithium ion battery finished product;
It is characterized in that, the microcellular structure that barrier film described in step D is made up of multilayer superfine fibre PETG is formed by stacking, staggered between levels micropore, forms the bent hole connecting in battery diaphragm.
5. the preparation method of a kind of gel polymer lithium ion battery according to claim 4, it is characterized in that: in step D, the average pore size scope of the individual layer of the multi-layer microporous structure of the barrier film of described lithium ion battery or superficial layer micropore is 0. 5-3.5 μ m, and the transparent effect aperture of staggered micropore under vertical perspective is less than 50nm layer by layer.
6. the preparation method of a kind of gel polymer lithium ion battery according to claim 5, it is characterized in that: microcellular structure (11), microcellular structure (22) and microcellular structure (33) stack that barrier film described in step D is made up of three layer superfine fibres form, staggered between levels micropore, in battery diaphragm, form the bent hole connecting.
7. the preparation method of a kind of gel polymer lithium ion battery according to claim 4, it is characterized in that: in described step B and step C, the stirring of described anode sizing agent, cathode size is all carried out in reactor, and temperature in the kettle is not higher than 35 DEG C, and baking temperature is not higher than 60 DEG C.
8. the preparation method of a kind of gel polymer lithium ion battery according to claim 4, it is characterized in that: described in described step B, in monomer solution, the quality of acrylic monomers accounts for 0.1～10% of anode sizing agent dry powder gross mass, described in described step C, in monomer solution, the quality of acrylic monomers is 0. 1～10% of cathode size dry powder gross mass.
9. the preparation method of a kind of gel polymer lithium ion battery according to claim 4, it is characterized in that: in described step e, thermal polymerization cross-linking reaction and gelation reaction are to be 65～120 DEG C in temperature, pressure is to carry out under the condition of 0.15～0.45MPa, and the reaction time is 2～200 minutes.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105742696A (en) * | 2016-05-04 | 2016-07-06 | 合肥国轩高科动力能源有限公司 | Method for compounding diaphragm and pole piece of wound laminated battery |
| CN108717965A (en) * | 2018-06-01 | 2018-10-30 | 江苏清陶能源科技有限公司 | A kind of lithium ion battery function ceramic-coated separator and preparation method thereof |
-
2014
- 2014-05-18 CN CN201410208970.0A patent/CN104037450A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105742696A (en) * | 2016-05-04 | 2016-07-06 | 合肥国轩高科动力能源有限公司 | Method for compounding diaphragm and pole piece of wound laminated battery |
| CN108717965A (en) * | 2018-06-01 | 2018-10-30 | 江苏清陶能源科技有限公司 | A kind of lithium ion battery function ceramic-coated separator and preparation method thereof |
| CN108717965B (en) * | 2018-06-01 | 2020-11-03 | 江苏清陶能源科技有限公司 | Functional ceramic coating diaphragm for lithium ion battery and preparation method thereof |
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