CN105449220A - Aqueous binder used for lithium ion battery and lithium ion battery thereby - Google Patents

Aqueous binder used for lithium ion battery and lithium ion battery thereby Download PDF

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Publication number
CN105449220A
CN105449220A CN201511035115.5A CN201511035115A CN105449220A CN 105449220 A CN105449220 A CN 105449220A CN 201511035115 A CN201511035115 A CN 201511035115A CN 105449220 A CN105449220 A CN 105449220A
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ion battery
lithium ion
lithium
modified polyacrylate
active material
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申津婧
高秀玲
王立仕
王驰伟
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Tianjin EV Energies Co Ltd
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Tianjin EV Energies Co Ltd
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Priority to CN201511035115.5A priority Critical patent/CN105449220A/en
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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
    • H01M4/623—Binders being polymers fluorinated polymers
    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • 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
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/362—Composites
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Secondary Cells (AREA)

Abstract

The invention provides aqueous binder used for a lithium ion battery. The binder is 1-6wt% of modified polyacrylate solution which takes deionized water as solvent, wherein the modified polyacrylate solution is one or the mixture of the following ingredients: organic silicon modified polyacrylate, organic fluorine modified polyacrylate or polyurethane modified polyacrylate. The aqueous binder used for the lithium ion battery has the characteristics of good adhesion, stability, weather resistance, flexibility and the like.

Description

A kind of lithium ion battery water-based binder and use the lithium ion battery of this binding agent
Technical field
The present invention relates to lithium ion battery technology, particularly relate to a kind of lithium ion battery water-based binder and use the lithium ion battery of this binding agent.
Background technology
Lithium ion battery being used widely in life, each side such as such as mobile phone, panel computer, electric automobile.And the effect of binding agent in lithium ion battery helps both positive and negative polarity active material and conductive agent attachment to be sticky in collection liquid surface, formation both positive and negative polarity pole piece, binding agent is an indispensable part in lithium ion battery composition, and the kind difference of binding agent has larger impact to the process of manufacture of lithium ion battery and the performance of lithium ion battery.
The binding agent of anode plate for lithium ionic cell is in the market divided into the binding agent of oily series solvent system binding agent and water solvent system usually.Wherein oil system binding agent selects Kynoar usually, Kynoar is a kind of hemicrystalline polymer, there is following shortcoming in battery applications: swelling bounce-back is large in the electrolytic solution, poor heat stability, easily overcharging, thermal shock time blast, have potential safety hazard; Next Kynoar needs to be dissolved in ability and both positive and negative polarity active material, conductive agent in organic solvent 1-METHYLPYRROLIDONE in use and mixes, and just can complete bonding effect.Use 1-METHYLPYRROLIDONE to need to increase the recovery system equipment of 1-METHYLPYRROLIDONE aborning, cost recovery is higher, too increases the production cost of battery simultaneously; 1-METHYLPYRROLIDONE is volatile in addition, can to environment.
In addition, the binding agent of water solvent generally selects butadiene-styrene rubber or polyacrylonitrile.
In existing lithium ion battery, the bonding agent of water solvent can meet the bonding of negative electrode active material, conductive agent and both positive and negative polarity collector, but there is following problem:
(1) first, the mechanical stability of butadiene-styrene rubber is poor, there will be strand by the problem interrupted when high speed dispersion; Butadiene-styrene rubber requires higher for transport storage condition in addition, there will be the problem that breakdown of emulsion lost efficacy after being below the freezing point; 3rd; butadiene-styrene rubber needs the additive adding sodium carboxymethylcellulose anti-settling in use; otherwise slurry there will be serious particle agglomeration, the phenomenon of sedimentation; and sodium carboxymethylcellulose is a kind of hydroaropic substance; there is stronger moisture absorption; easily cause pole piece moisture higher, so cause that battery flatulence, first efficiency are low, the problem such as Cycle Difference and poor safety performance.
(2) polyacrylonitrile (PAN) binding agent, although the mechanical stability that there is not butadiene-styrene rubber is poor and transport storage environment requires high problem, PAN binding agent containing-CN group, therefore there is very high polarity.The bonding force of material depend on adhesive molecular structure, by sticky material structure particularly surface texture, the polarity of molecule is larger, cementability is stronger, but intermolecular active force is also stronger, the rotation difficulty of strand strengthens, and distortional ability declines, the flexibility decrease of material, cause film forming comparatively hard with caudacoria, cause pole piece harder, embrittlement.The plasticizer improving PAN adhesive fragility is water, if that carries out pole piece under relative humidity 50-70% rolls the pole piece problems of crack that winding can avoid the generation because pole piece is crisp, but this drying depositing not exclusively or under higher levels of humidity, may current collector corrodes be caused, cause the internal resistance of made battery to be increased.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of new type lithium ion battery water-based binder and can, on the basis ensureing positive/negative active material, conductive agent and collector adhesive effect, avoids the problems referred to above to occur.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of lithium ion battery water-based binder, and described binding agent is mass content is 1%-6%, take deionized water as the modified polyacrylate solution of solvent.
Further, described modified polyacrylate solution is one or more mixing of silicone-modified polyacrylate, Organic fluoride modified polyacrylate or polyurethane-modified polyacrylate.
Another object of the present invention is to provide a kind of lithium ion battery battery level material, be made up of the component of following mass percent:
Modified polyacrylate 1-10%
Conductive agent 0-10%
Positive active material/negative electrode active material 80-99%.
Preferably, described positive active material can be the positive electrode of all known lithium ion batteries, as cobalt acid lithium, LiMn2O4, nickle cobalt lithium manganate or LiFePO 4.
Preferably, described negative electrode active material can be the negative material of all known lithium ion batteries, as Delanium, native graphite, MCMB, hard carbon, soft carbon, lithium titanate, silicon-carbon or silicon stannum alloy.
Preferably, described conductive agent is one or more mixing in conductive black, acetylene black, Graphene, electrically conductive graphite, conductive carbon pipe and conductive carbon fibre.
Further, the range of viscosities of described electrode material is 3000-9000mPa*s, and solid content is 35-85%.
Present invention also offers a kind of preparation method of lithium ion battery, comprise the steps: that (1) obtains lithium ion battery use binding agent by deionized water diluting modification polyacrylate solution; (2) add conductive agent and positive active material/negative electrode active material, after mixing, obtain slurry; (3) roller coat or spraying method is used to be coated on the collector of lithium ion battery by the slurry mixed; (4) by baking oven, solvent is dried removal, obtain pole piece; (5) pole piece is assembled, be made into battery.
The advantage that the present invention has and good effect are: modified polyacrylate not only has good cementability, also have the features such as excellent stability, weatherability, pliability, can solve current binding agent Problems existing:
(1) modified polyacrylate is compared butadiene-styrene rubber, use modified polyacrylate can simplify homogenate technique as bonding agent, do not need to add sodium carboxymethylcellulose as stabilizer, can reduce costs, the too high other problems caused of moisture can also be avoided; The mechanical stability of modified polyacrylate is relatively good in addition, the problem of the molecular chain rupture that similar butadiene-styrene rubber can be avoided to occur under high velocity agitation, effectively can ensure the adhesive effect of active material and collector; The weather resistance of modified polyacrylate is good simultaneously, occurs demulsifying phenomenon after can not being below the freezing point again;
(2) modified polyacrylate is compared polyacrylonitrile, modified polyacrylate contains-C=C-carbon-carbon double bond structure, also has the grafting of property modifying functional group simultaneously, strand is made to have certain crimpiness, namely distortional ability increases, thus while ensure that pole piece has better adhesive effect, also have reasonable pliability; In addition, the introducing of acrylonitrile (acrylonitrile has severe toxicity) is avoided when modified polyacrylate synthesizes again, relatively environmental protection, environmentally safe.
Embodiment
Embodiment 1
Polyurethane-modified polyacrylate deionized water is mixed with the glue that mass ratio is 5.0%, take 13.63 kilograms of glues and 0.42 kilogram of conductive agent (conductive black) puts into double-planet power mixer, stir 10 minutes under the condition of revolution 15rpm, improve rotating speed afterwards and certainly transferring 2500rpm to, revolving round the sun under for the condition of 35rpm and stir 30 minutes; Add 20 kilograms of negative electrode active materials (Delanium GHMG), stir 10 minutes under the condition of revolution 15rpm, improve rotating speed afterwards and certainly transferring 2500rpm to, revolving round the sun under for the condition of 35rpm and stir 90 minutes; The solid content of test slurry and viscosity afterwards, needing to reach range of viscosities is 3000-9000mPa*s, solid content is 35-85%, if do not met, need to add deionized water to adjust slurry viscosity, certainly transferring 2500rpm to, revolving round the sun under for the condition of 35rpm and stir 30 minutes, till slurry viscosity can reach coating requirement after adding appropriate amount of deionized water at every turn; The viscosity of testing final slurry is 4000mPa*s, and its solid content is 48.50%, is coated on negative current collector Copper Foil afterwards by the slurry mixed, and moisture is removed in baking, and is assembled in the battery of winding-structure by the negative plate made.
Embodiment 2
Silicone-modified polyacrylate deionized water is mixed with the glue that mass ratio is 5.0%, take 16.8 kilograms of glues and 0.56 kilogram of conductive agent (conductive carbon fibre) puts into double-planet power mixer, stir 10 minutes under the condition of revolution 15rpm, improve rotating speed afterwards and certainly transferring 2500rpm to, revolving round the sun under for the condition of 35rpm and stir 30 minutes; Add 20 kilograms of negative electrode active materials (MCMB), stir 10 minutes under the condition of revolution 15rpm, improve rotating speed afterwards and certainly transferring 2500rpm to, revolving round the sun under for the condition of 35rpm and stir 90 minutes; The solid content of test slurry and viscosity afterwards, needing to reach range of viscosities is 3000-9000mPa*s, solid content is 35-85%, if do not met, need to add deionized water to adjust slurry viscosity, certainly transferring 2500rpm to, revolving round the sun under for the condition of 35rpm and stir 30 minutes, till slurry viscosity can reach coating requirement after adding appropriate amount of deionized water at every turn; Be coated on negative current collector Copper Foil by the slurry mixed afterwards, moisture is removed in baking, and is assembled in the battery of winding-structure by the negative plate made.
Embodiment 3
Organic fluoride modified polyacrylate deionized water is mixed with the glue that mass ratio is 5.0%, take 20.2 kilograms of glues and 0.82 kilogram of conductive agent (conductive black) puts into double-planet power mixer, stir 10 minutes under the condition of revolution 15rpm, improve rotating speed afterwards and certainly transferring 2500rpm to, revolving round the sun under for the condition of 35rpm and stir 30 minutes; Add 20 kilograms of positive active materials (LiFePO4), stir 10 minutes under the condition of revolution 15rpm, improve rotating speed afterwards and certainly transferring 2500rpm to, revolving round the sun under for the condition of 35rpm and stir 90 minutes; The solid content of test slurry and viscosity afterwards, needing to reach range of viscosities is 3000-9000mPa*s, solid content is 35-85%, if do not met, need to add deionized water to adjust slurry viscosity, certainly transferring 2500rpm to, revolving round the sun under for the condition of 35rpm and stir 30 minutes, till slurry viscosity can reach coating requirement after adding appropriate amount of deionized water at every turn; Be coated on plus plate current-collecting body Copper Foil by the slurry mixed afterwards, moisture is removed in baking, and is assembled in the battery of winding-structure by the positive plate made.
Embodiment 4
Organic fluoride modified polyacrylate deionized water is mixed with the glue that mass ratio is 5.0%, take 4.9 kilograms of glues and 0.18 kilogram of conductive agent (conductive black) puts into double-planet power mixer, stir 10 minutes under the condition of revolution 15rpm, improve rotating speed afterwards and certainly transferring 2500rpm to, revolving round the sun under for the condition of 35rpm and stir 30 minutes; Add 20 kilograms of positive active materials (cobalt acid lithium), stir 10 minutes under the condition of revolution 15rpm, improve rotating speed afterwards and certainly transferring 2500rpm to, revolving round the sun under for the condition of 35rpm and stir 90 minutes; The solid content of test slurry and viscosity afterwards, needing to reach range of viscosities is 3000-9000mPa*s, solid content is 35-85%, if do not met, need to add deionized water to adjust slurry viscosity, certainly transferring 2500rpm to, revolving round the sun under for the condition of 35rpm and stir 30 minutes, till slurry viscosity can reach coating requirement after adding appropriate amount of deionized water at every turn; Be coated on plus plate current-collecting body Copper Foil by the slurry mixed afterwards, moisture is removed in baking, and is assembled in the battery of winding-structure by the positive plate made.
Comparative example 1
Polyacrylonitrile deionized water is mixed with the glue that mass ratio is 5.0%, take 13.63 kilograms of glues and 0.42 kilogram of conductive agent (conductive black) is put in double-planet power mixer, stir 10 minutes under the condition of revolution 15rpm, improve rotating speed afterwards and certainly transferring 2500rpm to, revolving round the sun under for the condition of 35rpm and stir 30 minutes; Add 20 kilograms of negative electrode active materials (Delanium GHMG), stir 10 minutes under the condition of revolution 15rpm, improve rotating speed afterwards and certainly transferring 2500rpm to, revolving round the sun under for the condition of 35rpm and stir 90 minutes; The solid content of test slurry and viscosity afterwards, needing to reach range of viscosities is 3000-9000mPa*s, solid content is 35-85%, if do not met, need to add deionized water to adjust slurry viscosity, certainly transferring 2500rpm to, revolving round the sun under for the condition of 35rpm and stir 30 minutes, till slurry viscosity can reach coating requirement after adding appropriate amount of deionized water at every turn; The viscosity of testing size is 3900mPa*s, and its solid content is 48.36%, is coated on negative current collector Copper Foil afterwards by the slurry mixed, and moisture is removed in baking, and is assembled in the battery of winding-structure by the negative plate made.
Comparative example 2
Sodium carboxymethylcellulose deionized water is mixed with the glue of mass ratio 2.0%, take sodium carboxymethylcellulose glue 15.79 kilograms of glues and 0.42 kilogram of conductive agent (conductive black) is put in double-planet power mixer, stir 10 minutes under the condition of revolution 15rpm, improve rotating speed afterwards and certainly transferring 2500rpm to, revolving round the sun under for the condition of 35rpm and stir 30 minutes, add 20 kilograms of negative electrode active materials (Delanium GHMG), stir 10 minutes under the condition of revolution 15rpm, improve rotating speed afterwards and certainly transferring 2500rpm to, revolving round the sun under for the condition of 35rpm and stir 90 minutes, carry out solid content and the viscosity measurements of slurry afterwards, needing to reach range of viscosities is 3000-9000mPa*s, solid content is 35-85%, if do not met, need to add deionized water to adjust slurry viscosity, certainly transferring 2500rpm to after adding appropriate amount of deionized water at every turn, stir 30 minutes under the condition that revolution is 35rpm, until slurry viscosity can reach coating requirement, then take 0.79 kilogram of SBR emulsion (weight ratio is 40%) to join and regulate in the slurry of viscosity, use respectively from transferring 1000rpm to, revolve round the sun as 25rpm condition stirs 30 minutes, the viscosity of testing size is 4500mPa*s, its solid content is 46.09%, afterwards the slurry mixed is coated on negative current collector Copper Foil, moisture is removed in baking, and the negative plate made is assembled in the battery of winding-structure.
Comparative example 3
Sodium carboxymethylcellulose deionized water is mixed with the glue that mass ratio is 2.0%, take sodium carboxymethylcellulose glue 15.79 kilograms of glues and 0.42 kilogram of conductive agent is put in double-planet power mixer, stir 10 minutes under the condition of revolution 15rpm, improve rotating speed afterwards and certainly transferring 2500rpm to, revolving round the sun under for the condition of 35rpm and stir 30 minutes, add 20 kilograms of negative electrode active materials (Delanium GHMG), stir 10 minutes under the condition of revolution 15rpm, improve rotating speed afterwards and certainly transferring 2500rpm to, revolving round the sun under for the condition of 35rpm and stir 90 minutes, carry out solid content and the viscosity measurements of slurry afterwards, needing to reach range of viscosities is 3000-9000mPa*s, solid content is 35-85%, if do not meet coating requirement, need to add deionized water to adjust slurry viscosity, certainly transferring 2500rpm to after adding appropriate deionization at every turn, stir 30 minutes under the condition that revolution is 35rpm, until slurry viscosity can reach coating requirement, then take 0.79 kilogram of SBR emulsion (weight ratio is 40%) to join and regulate in the slurry of viscosity, use respectively from transferring 2500rpm to, revolution is that the condition of 35rpm stirs 30 minutes, the viscosity of testing size is 3800mPa*s, its solid content is 46.05%.Be coated on negative current collector Copper Foil by the slurry mixed afterwards, moisture is removed in baking, and is assembled in the battery of winding-structure by the negative plate made.
Comparative example 4
Sodium carboxymethylcellulose deionized water is mixed with the glue that mass ratio is 2.0%, take sodium carboxymethylcellulose glue 15.79 kilograms of glues and 0.42 kilogram of conductive agent is put in double-planet power mixer, stir 10 minutes under the condition of revolution 15rpm, improve rotating speed afterwards and certainly transferring 2500rpm to, revolving round the sun under for the condition of 35rpm and stir 30 minutes, add 20 kilograms of negative electrode active materials (Delanium GHMG), stir 10 minutes under the condition of revolution 15rpm, improve rotating speed afterwards and certainly transferring 2500rpm to, revolving round the sun under for the condition of 35rpm and stir 90 minutes, carry out solid content and the viscosity measurements of slurry afterwards, needing to reach range of viscosities is 3000-9000mPa*s, solid content is 35-85%, if do not meet coating requirement, need to add deionized water to adjust slurry viscosity, certainly transferring 2500rpm to after adding appropriate deionization at every turn, stir 30 minutes under the condition that revolution is 35rpm, until slurry viscosity can reach coating requirement, then the SBR emulsion placing 2h in the environment of-10 DEG C is taken 0.79 kilogram (weight ratio is 40%) to join and regulate in the slurry of viscosity, use respectively from transferring 1000rpm to, revolve round the sun as 25rpm condition stirs 30 minutes, the viscosity of testing size is 3400mPa*s, its solid content is 46.20%.Be coated on negative current collector Copper Foil by the slurry mixed afterwards, moisture is removed in baking, and is assembled in the battery of winding-structure by the negative plate made.
Comparative experimental example 1
Three kinds of different binding agents are carried out binding agent memory property test (i.e. breakdown of emulsion test): be put into respectively by binding agent in the environment of-10 DEG C and place 2h, afterwards operation polyacrylate and polyacrylonitrile binding agent are diluted to viscosity 2000mPa*s, use 200 object screen filtrations; SBR emulsion viscosity is not higher than 100mPa*s; can directly filter without the need to dilution; observe on screen cloth whether have residual aggregate after filtering, be breakdown of emulsion, then the memory property of this binding agent is poor; Anyway as the same.Test result is as follows:
Table one: different binding agent mechanical stability test comparison
Comparative experimental example 2
Embodiment 1 and comparative example 1-4 binding agent used are carried out processing characteristics contrast, and result is as follows:
Table two: different binding agent processing characteristics contrast
Comparative experimental example 3
Battery embodiment 1 and comparative example 1-4 obtained carries out electrical property contrast test, and result is as follows:
Table three: different binding agent electrical property contrast
Battery core capacity (mAh) Efficiency (%) first 300 weeks capability retentions
Embodiment 1 2572.3 93.5％ 95.6％
Comparative example 1 2505.3 92.5％ 91.5％
Comparative example 2 2547.2 92.9％ 92.1％
Binding agent cementability provided by the invention is better as can be seen from the above table, uses operation simple, is more suitable for being applied to large-scale production, simultaneously the relatively good yields that can provide battery production of the pliability of this binding agent.
Above embodiments of the invention have been described in detail, but described content being only preferred embodiment of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the scope of the invention change and improve, and all should still belong within this patent covering scope.

Claims (8)

1. a lithium ion battery water-based binder, is characterized in that: described binding agent is mass content is 1%-6%, take deionized water as the modified polyacrylate solution of solvent.
2. lithium ion battery water-based binder according to claim 1, is characterized in that: described modified polyacrylate solution is one or more mixing of silicone-modified polyacrylate, Organic fluoride modified polyacrylate or polyurethane-modified polyacrylate.
3. a lithium ion battery battery level material, is characterized in that, is made up of the component of following mass percent:
Modified polyacrylate 1-10%
Conductive agent 0-10%
Positive active material/negative electrode active material 80-99%.
4. electrodes of lithium-ion batteries material according to claim 3, is characterized in that: described positive active material comprises cobalt acid lithium, LiMn2O4, nickle cobalt lithium manganate or LiFePO 4.
5. electrodes of lithium-ion batteries material according to claim 3, is characterized in that: described negative electrode active material comprises Delanium, native graphite, MCMB, hard carbon, soft carbon, lithium titanate, silicon-carbon or silicon stannum alloy.
6. electrodes of lithium-ion batteries material according to claim 3, is characterized in that: described conductive agent is one or more mixing in conductive black, acetylene black, Graphene, electrically conductive graphite, conductive carbon pipe and conductive carbon fibre.
7. electrodes of lithium-ion batteries material according to claim 3, is characterized in that: the range of viscosities of described electrode material is 3000-9000mPa*s, and solid content is 35-85%.
8. a preparation method for lithium ion battery, is characterized in that, comprises the steps: that (1) obtains lithium ion battery use binding agent by deionized water diluting modification polyacrylate solution; (2) add conductive agent and positive active material/negative electrode active material, after mixing, obtain slurry; (3) roller coat or spraying method is used to be coated on the collector of lithium ion battery by the slurry mixed; (4) by baking oven, solvent is dried removal, obtain pole piece; (5) pole piece is assembled, be made into battery.
CN201511035115.5A 2015-12-31 2015-12-31 Aqueous binder used for lithium ion battery and lithium ion battery thereby Pending CN105449220A (en)

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CN106299245A (en) * 2016-09-19 2017-01-04 吉安市优特利科技有限公司 Silica-based negative electrode and preparation method thereof and lithium ion battery
CN108987751A (en) * 2017-05-31 2018-12-11 宁德时代新能源科技股份有限公司 Binder and secondary battery thereof
CN109473677A (en) * 2018-10-23 2019-03-15 欣旺达电子股份有限公司 Lithium ion battery, silicium cathode water-based binder and preparation method thereof
CN110364734A (en) * 2019-06-06 2019-10-22 华南理工大学 High-performance water-based compounding negative electrode of lithium ion battery binder and preparation method and application
CN110247023A (en) * 2019-06-13 2019-09-17 华中科技大学 A kind of novel battery pole piece Enhancement Method and corresponding pole piece
CN110247023B (en) * 2019-06-13 2020-09-08 华中科技大学 Battery pole piece reinforcing method and corresponding pole piece
CN111740108A (en) * 2020-06-19 2020-10-02 浙江中科立德新材料有限公司 High-nickel ternary cathode aqueous binder for lithium ion battery and preparation method thereof
CN111740108B (en) * 2020-06-19 2022-06-28 浙江中科立德新材料有限公司 High-nickel ternary cathode water-based binder for lithium ion battery and preparation method thereof
CN111785975A (en) * 2020-07-31 2020-10-16 蜂巢能源科技有限公司 Current collector, preparation method and application thereof, cathode and lithium ion battery

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Application publication date: 20160330