CN104752729A - Preparation method of aqueous composite binder having electronic and ionic conductivity generality for lithium ion battery - Google Patents
Preparation method of aqueous composite binder having electronic and ionic conductivity generality for lithium ion battery Download PDFInfo
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- CN104752729A CN104752729A CN201510102142.3A CN201510102142A CN104752729A CN 104752729 A CN104752729 A CN 104752729A CN 201510102142 A CN201510102142 A CN 201510102142A CN 104752729 A CN104752729 A CN 104752729A
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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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
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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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
- H01M4/622—Binders being polymers
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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
- 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
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention discloses a preparation method of an aqueous composite binder having electronic and ionic conductivity generality for a lithium ion battery; a flexibilizer, an ionic binder and a water-soluble polymer are blended to form a polymer matrix, wherein the ionic binder provides a lithium source; furthermore, the polymer matrix is capable of conducting lithium ion; a conductive agent is dispersed into the polymer matrix to form a composite conductive polymer; and a filling material is added into a polymeric system, so that a conductive network is formed. The aqueous composite binder prepared by the preparation method disclosed by the invention is an electronic conductor and also is an ion conductor; therefore, the content of lithium ion in a positive plate can be effectively increased; and the cycling stability of the battery is increased.
Description
Technical field
The present invention relates to materials chemistry and new energy field, the preparation method being specifically related to a kind of water-based compound binding agent and the water-based compound binding agent using the method to obtain are applied in the preparation of based lithium-ion battery positive plate.
Background technology
Lithium ion battery, as the first march of contemporary battery industry, the main rechargeable battery being applied in portable type electronic product, electric tool and electric automobile etc.Domestic and external electric automobile market constantly expands, and the demand of lithium ion battery also will constantly increase.Prepare lithium ion battery and need auxiliary material binding agent, it is also the key factor affecting battery formation and combination property thereof.
The charge and discharge process of lithium ion battery is the cyclic process that lithium ion and electronics participate in jointly, is to ensure larger charging and discharging currents and cycle life, is the good mixed conductor of ion and electronics with regard to necessarily requiring the electrode material of lithium ion battery.But business-like positive and negative pole material is all semi-conducting material usually, and its intrinsic electronic conductivity is all 10
-1-10
-9s/cm, the conductive performance of electronics between active material particle is poor, and the conductivity depending merely on active material itself is far from being enough, and lithium ion conduction relies on binding agent and active material junction.
In the industrial production, anode material for lithium-ion batteries generally adopts Kynoar PVDF as binding agent, but its electronics and ionic conductivity poor, be unfavorable for the migration at lithium ion and interface inner at pole piece, increase battery polarization and internal resistance, cause the problems such as cycle performance in high rate charge-discharge situation is poor, capacity is decayed rapidly; And organic solvent such as the nitrogen methyl pyrrolidone NMP dissolved used by PVDF is harmful to environment and human body, and expensive, in order to reduce the harm to environment, reclaim the manufacturing cost that NMP further increases lithium ion battery.Aqueous binders uses water as solvent, not only cheap, and pollution-free.
When preparing graphite cathode sheet, the industrial water-based compound binding agent system having adopted CMC (sodium carboxymethylcellulose) and SBR (butadiene-styrene rubber) latex to combine, this kind of binding agent and active material are point cantact, faying face is little, lack long-range between the electrode particle manufactured to connect, be unfavorable for the conduction of ion and electronics.
In the prior art, people has been had using water-based compound system as lithium ion battery electrode material binding agent.Such as, Chinese patent application CN200410050866.X discloses the waterborne compound adhesive system be made up of polytetrafluoroethylene (PTFE) and cellulose ethers and prepares anode sizing agent, lithium battery and its preparation method.But, this kind of compound system and active material are point cantact, faying face is little, lack long-range between the electrode particle manufactured to connect, be unfavorable for the conduction of ion and electronics, cause the anode sizing agent prepared to be coated on aluminium foil, after drying, cathode film cannot be attached in aluminum foil current collector in good condition, especially one side aluminium foil, and the adhesive force of binder system to collector is inadequate; And the battery polarization of preparation is large, electrical property is not good, cannot be applied in industry.
Summary of the invention
The object of this invention is to provide a kind of preparation method with the lithium ion battery use compound binding agent of electronics and ionic conductivity general character, conductive agent is filled in polymeric matrix and forms composite conducting material, be applied in lithium ion battery electrode material, it is made both to have ionic conductivity, again there is electron conduction, reduce battery polarization and internal resistance, avoid the problems such as battery cycle performance under charge status is poor, capacity is decayed rapidly; The present invention take water as solvent, cheap, avoids the harm of organic solvent to environment.
A preparation method for lithium ion battery electrode material use compound binding agent, comprises the following steps:
(1) flexibility agent is dissolved in the water;
(2) in above-mentioned solution, add water-soluble polymer, be stirred to dissolving;
(3) then in the solution of step (2), add ionic binding agent, be stirred to and dissolve completely, obtain polymeric matrix;
(4) in above-mentioned polymeric matrix, add conductive agent, be uniformly dispersed.
Wherein, preferably, flexibility agent is partially hydrolyzed polyacrylamide (PHPA); Water-soluble polymer is polyvinyl alcohol; Ionic binding agent is carboxymethyl cellulose lithium; Conductive agent be carbon system filler as in acetylene black, graphite, Graphene, carbon black, carbon nano-tube etc. any one or a few.
Preferably, relative to obtained positive plate, not containing solvent, the percentage by weight of described water-soluble polymer is 1% ~ 10%, the percentage by weight of ionic binding agent is 1% ~ 5%, and the percentage by weight of flexibility agent is 0.01% ~ 0.5%, and the percentage by weight of conductive agent is 1% ~ 12%.
Further preferably, the percentage by weight of water-soluble polymer is 2% ~ 7%.
Further preferably, the percentage by weight of ionic binding agent is 1% ~ 3.5%.
Further preferably, the percentage by weight of flexibility agent is 0.01% ~ 0.3%.
Further preferably, the percentage by weight of conductive agent is 2% ~ 10%.
In above-mentioned preparation method, in step (1), preferred partially hydrolyzed polyacrylamide (PHPA) is prepared by such method: polyacrylamide is soluble in water, adds lithium hydroxide, is heated to 40 ~ 90 DEG C, stir 2 ~ 8h, be cooled to room temperature, add organic solvent such as ethanol and separate out to there being solid, leave standstill, suction filtration, washing, dry, bake out temperature is 50 ~ 80 DEG C.
Preferably polyvinyl alcohol dissolution is adopted such preparation method in solution in step (2), solution is heated to 50 ~ 80 DEG C, add polyvinyl alcohol while stirring, then be stirred to polyvinyl alcohol all to dissolve, stop heating, be cooled to room temperature under stirring, finally add ionic binding agent.
In step (3), preferably carboxymethyl cellulose lithium adopts such preparation method, sodium carboxymethylcellulose is scattered in ethanol, stir lower acid adding (hydrochloric acid or sulfuric acid) to dissolve, insoluble matter to be had is separated out, add the ethanol of 90%, precipitation, filter, washing, dry carboxymethyl cellulose; Carboxymethyl cellulose is scattered in ethanol, adds lithium hydroxide solution, be stirred to carboxymethyl cellulose and all dissolve, add the ethanol of 90%, precipitation, filter, washing, dry carboxymethyl cellulose lithium.
The preparation flow of water-based compoiste adhering agent solution: partially hydrolyzed polyacrylamide (PHPA) is soluble in water, be stirred to dissolving, solution is heated to 50 ~ 80 DEG C, add polyvinyl alcohol while stirring, then be stirred to polyvinyl alcohol all to dissolve, stop heating, under stirring, be cooled to room temperature, finally add ionic binding agent, be stirred to dissolving.
The water-based compound binding agent that the present invention obtains can be applicable in the preparation of the lithium ion battery in the preparation of based lithium-ion battery positive plate and containing this positive plate.
accompanying drawing is sketched
Fig. 1 is LiAl prepared by PVDF and water-based compound binding agent
0.04mn
1.96o
4the specific capacity of battery and the relation of voltage;
Fig. 2 is LiFePO prepared by PVDF and water-based compound binding agent
4the specific capacity of battery and the relation of voltage;
Fig. 3 is LiFePO prepared by PVDF and water-based compound binding agent
4aC impedance after circulating battery.
Embodiment
Below by embodiment, also the present invention is described in further detail by reference to the accompanying drawings.Adopt prior art, utilize the positive plate that water-based compound binding agent of the present invention is made, and be assembled into battery further, investigate by carrying out test to the coating performance of positive plate and the chemical property etc. of battery, effect of the present invention is described.
Material source: if no special instructions, all material is all bought by business.
Water-based compound binding agent of the present invention is prepared by following method:
(1) flexibility agent is dissolved in the water;
(2) in above-mentioned solution, add water-soluble polymer, heating is stirred to dissolving;
(3) then in the solution of step (2), add ionic binding agent, be stirred to and dissolve completely, obtain polymeric matrix;
(4) in above-mentioned polymeric matrix, add conductive agent, be uniformly dispersed.
Preferred partially hydrolyzed polyacrylamide (PHPA) increases the pliability of pole piece, and non-selected polyacrylamide, be because lithium source content can be improved first; Second the amount of hydrolysis of polyacrylamide in water is reduced.Be heated to 50 ~ 90 DEG C in preparation process and be beneficial to hydrolysis of polyacrylamide, when its content is too low (< 0.01%), effectively can not improve the pliability of pole piece; During too high levels (> 0.5%), after the pole piece of preparation is assembled into battery, battery capacity is not high.Preferably polyethylene alcohol and carboxymethyl cellulose lithium used in combination, if one is be used alone polyvinyl alcohol or carboxymethyl cellulose lithium, the positive plate hardness of preparation is excessive, easy aliquation; Two are that of avoiding that to be used alone polyvinyl alcohol viscosity too low, and it is too high to be used alone carboxymethyl cellulose lithium viscosity.Both shared percentage compositions are too high, and battery capacity is not high, and too low anode sizing agent Painting effect is on the current collector bad.
Below, by specific embodiment in detail implementation result of the present invention is described in detail.
[embodiment 1] is in agitator, add 100 parts of water, be placed on magnetic stirring apparatus, add partially hydrolyzed polyacrylamide (PHPA) powder, be stirred to and dissolve completely, be heated to 50 ~ 80 DEG C, add polyvinyl alcohol, be stirred to dissolving, stop heating, to be cooledly to room temperature, add carboxymethyl cellulose lithium, continue to be stirred to it all to dissolve, the water-based compound binding agent of three's composition is 10 parts, relative to water-based compound binding agent, not containing solvent, wherein the percentage by weight of partially hydrolyzed polyacrylamide (PHPA) is 0.1%, 0.15%, 0.3%, polyvinyl alcohol: carboxymethyl cellulose lithium is 20:1, 10:1, 2:1.In above-mentioned solution, add 10 parts of conductive agent acetylene blacks, after fully stirring 1 ~ 3h, add active material LiFePO
480 parts, fully stir 3 ~ 24h.If produce bubble in pulping process, can add a small amount of ethanol (industrial de-airing mixer of selecting is to eliminate bubble), to the pitch-black light of slurry color and luster, good fluidity, bubble-free, then slurry prepares, and can be coated with.
[embodiment 2] method step is the same, and the ratio unlike binding agent, conductive agent, active material three is 8:10:82.
[embodiment 3] method step is the same, and the ratio unlike binding agent, conductive agent, active material three is 6:10:84.
[embodiment 4] method step is the same, changes LiAl into unlike active material
0.04mn
1.96o
4, the ratio of binding agent, conductive agent, active material three is 8:10:82.
[embodiment 5] method step is the same, is made up of partially hydrolyzed polyacrylamide (PHPA), polyvinyl alcohol, lithium silicate aqueous solution unlike compound binding agent, and active material is LiFePO
4, the ratio of binding agent, conductive agent, active material three is 10:10:80.
[embodiment 6] method step is the same, is made up of polyethylene glycol oxide, polyvinyl alcohol, lithium silicate aqueous solution unlike compound binding agent, and active material is LiFePO
4, the ratio of binding agent, conductive agent, active material three is 10:10:80.
[embodiment 7] method step is the same, is made up of polyethylene glycol oxide, polyvinylpyrrolidone, lithium silicate aqueous solution unlike compound binding agent, and active material is LiFePO
4, the ratio of binding agent, conductive agent, active material three is 10:10:80.
[embodiment 8] method step is the same, is made up of polyacrylamide, polyethylene glycol, lithium silicate aqueous solution unlike compound binding agent, and active material is LiFePO
4, the ratio of binding agent, conductive agent, active material three is 10:10:80.
[embodiment 9] method step is the same, is made up of polyacrylamide, polyvinyl alcohol, carboxymethyl cellulose lithium unlike compound binding agent, and active material is LiFePO
4, the ratio of binding agent, conductive agent, active material three is 10:10:80.
[embodiment 10] method step is the same, is made up of polyvinyl alcohol, CMC, lithium silicate aqueous solution unlike compound binding agent, and active material is LiFePO
4, the ratio of binding agent, conductive agent, active material three is 10:10:80.
(1) preparation of positive plate
With the slurry prepared above, be coated with scraper, be that the one side aluminium foil of 20um is collector with thickness, coating thickness is 400um, obtains positive plate after naturally drying.
(2) positive plate coating performance test
Positive plate tests its adhesive force and pliability according to GB GB/T9286-1998 and GB/T1731-1993 after drying respectively.
(3) battery assembling
Above-mentioned dry after positive plate, be cut into the sequin that diameter is 14mm, be placed in 80 DEG C, baking oven, bake 8h, drier 12h at 120 DEG C, vacuum, weigh, with lithium sheet for negative plate, in glove box, be assembled into button cell, sealing, carries out electric performance test.
(4) battery testing
The battery sealed is placed in the blue electrical testing system of LAND, leaves standstill 3h, first charge to required voltage, then constant voltage charge 0.5h, finally with required multiplying power discharging to required voltage.
Comparative example: respectively with LiFePO
4, LiAl
0.04mn
1.96o
4for positive electrode, Kynoar (PVDF) be binding agent, 1-METHYLPYRROLIDONE (NMP) obtains positive plate for solvent, positive plate consists of: positive electrode 80 parts, acetylene black 10 parts, PVDF 10 parts, NMP 100 parts.Obtain battery by above-mentioned steps, difference is, when PVDF is dissolved in NMP, need be heated to 45 DEG C, and heating time is 3-5h; It is dry that slurry has been coated with the rear baking oven that is directly placed in.
Test shows, LiFePO prepared by water-based compound binding agent
4positive plate film forming is good, pole piece is flawless, and the pliability of positive plate and adhesive force are all qualified; The LiFePO of preparation
4the battery that the chemical property of battery is prepared close to PVDF, after circulation, compound system polarization is less, and impedance is less; Make LiAl prepared by use compound binding agent system
0.04mn
1.96o
4the chemical property of battery is slightly better than battery prepared by PVDF, after battery 50 circulations prepared by two kinds of systems, specific discharge capacity is respectively 93.1mAh/g, 87.5mAh/g, capability retention after 50 circulations is respectively 83.9%, 79.5%, and water-based compound system shows better cyclical stability.
Test result is in table 1 ~ table 2, Fig. 1 ~ Fig. 3.
In table 1 water-based compound binding agent, each component is to the LiFePO of preparation
4the impact of the coating performance of pole piece
In table 2 water-based compound binding agent, each component percentages is to the LiFePO of preparation
4the impact of the specific discharge capacity of battery
Note 1: the percentage composition of water-based compound binding agent is the quality relative to positive plate after drying, not containing solvent;
Note 2: the percentage composition of partially hydrolyzed polyacrylamide (PHPA) and polyvinyl alcohol: carboxymethyl cellulose lithium is the quality relative to water-based compound binding agent, not containing solvent.
Claims (10)
1. there is a preparation method for the lithium ion battery use compound binding agent of electronics and ionic conductivity general character, comprise the following steps:
(1) flexibility agent is dissolved in the water;
(2) in above-mentioned solution, add water-soluble polymer, be stirred to dissolving;
(3) then in the solution of step (2), add ionic binding agent, be stirred to and dissolve completely, obtain polymeric matrix;
(4) in above-mentioned polymeric matrix, add conductive agent, be uniformly dispersed.
2. according to the preparation method of water-based compound binding agent according to claim 1, it is characterized in that: relative to obtained positive plate, not containing solvent, the percentage by weight of described flexibility agent is 0.01% ~ 0.5%, the percentage by weight of water-soluble polymer is 1% ~ 10%, the percentage by weight of ionic binding agent is 1% ~ 5%, and the percentage by weight of conductive agent is 1% ~ 12%.
3. according to the preparation method of water-based compound binding agent according to claim 2, it is characterized in that: the percentage by weight of described flexibility agent is 0.01% ~ 0.3%.
4. according to the preparation method of water-based compound binding agent according to claim 2, it is characterized in that: the percentage by weight of described water-soluble polymer is 2% ~ 7%.
5. according to the preparation method of water-based compound binding agent according to claim 2, it is characterized in that: the percentage by weight of described ionic binding agent is 1% ~ 3.5%.
6. according to the preparation method of water-based compound binding agent according to claim 2, it is characterized in that: the percentage by weight of described conductive agent is 2% ~ 10%.
7. according to the preparation method of the water-based compound binding agent described in claim 1 ~ 6 any one, it is characterized in that: described flexibility agent is selected from one or more in partially hydrolyzed polyacrylamide (PHPA), polyacrylamide, polyethylene glycol oxide, polyvinylpyrrolidone and polyvinyl alcohol; Described water-soluble polymer is selected from one or more in polyvinyl alcohol, polyethylene glycol and CMC; Described ionic binding agent is selected from one or more in carboxymethyl cellulose lithium, Lithium polyacrylate, polymethylacrylic acid lithium, poly-ethylacrylic acid lithium and lithium silicate aqueous solution; Described conductive agent is selected from the carbon system filler of acetylene black, graphite, Graphene, carbon black, carbon nano-tube; The conducting polymer composite of polyacetylene, polyaniline, polythiophene, polypyrrole; The salt of lithium metaaluminate, silicate; Any one or a few in the conducting metal oxide of ruthenic oxide, tin ash.
8. according to the preparation method of water-based compound binding agent according to claim 7, it is characterized in that: described flexibility agent is partially hydrolyzed polyacrylamide (PHPA); Described water-soluble polymer is polyvinyl alcohol; Described ionic binding agent is carboxymethyl cellulose lithium; Described conductive agent is acetylene black.
9. a positive plate for lithium ion battery, is characterized in that: in its preparation process, use water-based compound binding agent prepared by the method described in above-mentioned 1 ~ 8 any one claim.
10. a lithium ion battery, comprises based lithium-ion battery positive plate according to claim 9.
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Cited By (12)
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| CN105336961A (en) * | 2015-11-30 | 2016-02-17 | 四川北方硝化棉股份有限公司 | Lithium battery anode and preparation method thereof |
| CN105428658A (en) * | 2015-12-21 | 2016-03-23 | 中盐安徽红四方锂电有限公司 | Waterborne binder positive electrode material for lithium iron phosphate battery and preparation method therefor |
| CN105489897A (en) * | 2015-11-27 | 2016-04-13 | 中航锂电（洛阳）有限公司 | Conductive liquid for lithium ion battery ternary positive electrode material and preparation method for conductive liquid, and lithium ion battery |
| CN106356534A (en) * | 2015-07-18 | 2017-01-25 | 宁波大学 | Adhesive for lithium ion battery and preparation method of adhesive |
| CN107732169A (en) * | 2017-09-17 | 2018-02-23 | 亚士创能科技(上海)股份有限公司 | Lithium battery silicon based anode material and preparation method thereof, GND and lithium battery |
| CN109167064A (en) * | 2018-08-21 | 2019-01-08 | 李国富 | A kind of compound binding agent and preparation method thereof applied in anode material for lithium-ion batteries |
| CN111129499A (en) * | 2019-12-30 | 2020-05-08 | 宣城研一新能源科技有限公司 | Water-based conductive adhesive for lithium battery and preparation method thereof |
| CN111668485A (en) * | 2020-05-22 | 2020-09-15 | 远景动力技术(江苏)有限公司 | Binder for lithium ion battery and preparation method and application thereof |
| CN112029452A (en) * | 2020-09-10 | 2020-12-04 | 华鼎国联四川电池材料有限公司 | Preparation method and application of adhesive capable of improving battery rate performance |
| CN113644273A (en) * | 2021-08-13 | 2021-11-12 | 中科检测技术服务(重庆)有限公司 | Ionic-electronic co-conductive material and preparation method and device thereof |
| CN114805823A (en) * | 2022-04-25 | 2022-07-29 | 惠州锂威新能源科技有限公司 | Crosslinked composite binder, preparation method thereof, pole piece and secondary battery |
| CN117117077A (en) * | 2023-01-13 | 2023-11-24 | 荣耀终端有限公司 | Negative electrode plate, preparation method of negative electrode plate and lithium ion battery |
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| CN106356534A (en) * | 2015-07-18 | 2017-01-25 | 宁波大学 | Adhesive for lithium ion battery and preparation method of adhesive |
| CN105489897A (en) * | 2015-11-27 | 2016-04-13 | 中航锂电（洛阳）有限公司 | Conductive liquid for lithium ion battery ternary positive electrode material and preparation method for conductive liquid, and lithium ion battery |
| CN105489897B (en) * | 2015-11-27 | 2018-05-04 | 中航锂电（洛阳）有限公司 | Ternary cathode material of lithium ion battery conduction liquid and preparation method thereof, lithium ion battery |
| CN105336961A (en) * | 2015-11-30 | 2016-02-17 | 四川北方硝化棉股份有限公司 | Lithium battery anode and preparation method thereof |
| CN105428658A (en) * | 2015-12-21 | 2016-03-23 | 中盐安徽红四方锂电有限公司 | Waterborne binder positive electrode material for lithium iron phosphate battery and preparation method therefor |
| CN105428658B (en) * | 2015-12-21 | 2018-01-09 | 中盐安徽红四方锂电有限公司 | A kind of aqueous binders positive electrode of ferric phosphate lithium cell and preparation method thereof |
| CN107732169B (en) * | 2017-09-17 | 2021-02-12 | 亚士创能科技(上海)股份有限公司 | Silicon-based negative electrode material of lithium battery, preparation method of silicon-based negative electrode material, battery negative electrode and lithium battery |
| CN107732169A (en) * | 2017-09-17 | 2018-02-23 | 亚士创能科技(上海)股份有限公司 | Lithium battery silicon based anode material and preparation method thereof, GND and lithium battery |
| CN109167064B (en) * | 2018-08-21 | 2021-08-27 | 李国富 | Composite binder applied to lithium ion battery anode material and preparation method thereof |
| CN109167064A (en) * | 2018-08-21 | 2019-01-08 | 李国富 | A kind of compound binding agent and preparation method thereof applied in anode material for lithium-ion batteries |
| CN111129499A (en) * | 2019-12-30 | 2020-05-08 | 宣城研一新能源科技有限公司 | Water-based conductive adhesive for lithium battery and preparation method thereof |
| CN111668485A (en) * | 2020-05-22 | 2020-09-15 | 远景动力技术(江苏)有限公司 | Binder for lithium ion battery and preparation method and application thereof |
| CN112029452A (en) * | 2020-09-10 | 2020-12-04 | 华鼎国联四川电池材料有限公司 | Preparation method and application of adhesive capable of improving battery rate performance |
| CN112029452B (en) * | 2020-09-10 | 2022-04-15 | 华鼎国联四川电池材料有限公司 | Preparation method and application of adhesive capable of improving battery rate performance |
| CN113644273A (en) * | 2021-08-13 | 2021-11-12 | 中科检测技术服务(重庆)有限公司 | Ionic-electronic co-conductive material and preparation method and device thereof |
| CN114805823A (en) * | 2022-04-25 | 2022-07-29 | 惠州锂威新能源科技有限公司 | Crosslinked composite binder, preparation method thereof, pole piece and secondary battery |
| CN117117077A (en) * | 2023-01-13 | 2023-11-24 | 荣耀终端有限公司 | Negative electrode plate, preparation method of negative electrode plate and lithium ion battery |
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