CN102386374A - Lithium-ion power cell aqueous sizing agent and manufacturing method thereof - Google Patents
Lithium-ion power cell aqueous sizing agent and manufacturing method thereof Download PDFInfo
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- CN102386374A CN102386374A CN201110321984XA CN201110321984A CN102386374A CN 102386374 A CN102386374 A CN 102386374A CN 201110321984X A CN201110321984X A CN 201110321984XA CN 201110321984 A CN201110321984 A CN 201110321984A CN 102386374 A CN102386374 A CN 102386374A
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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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Abstract
The invention discloses a lithium-ion power cell aqueous sizing agent which comprises the following components according to weight percent: 40%-50% of powder, 40%-50% of solvent, 4%-5% of binder and 0.02%-2% of additive. The method of manufacturing the lithium-ion power cell aqueous sizing agent comprises the following steps: pretreating, premixing, preparing glue and preparing the sizing agent. By adopting the technical scheme, active matters are added in the formula, so that the circulating life of a cell is effectively prolonged; relative to the oily formula, deionized water is adopted in the invention as the solvent so that the manufacturing cost of the cell is reduced; and in the invention, aqueous glue which has glueyness and plasticity is adopted, so that the performance of the sizing agent and the manufacturing performance of a pole piece are improved.
Description
Technical field
The present invention relates to a kind of lithium-ion-power cell water paste.
Background technology
Along with people's requires increasingly highly to lithium ion battery, and lithium ion battery begins to develop to big capacity, powerful electrokinetic cell direction.With respect to the portable communications power supply, the total price of electrokinetic cell is considerably beyond client's ability to bear, reduces the battery manufacturing cost important that just seems, the lithium battery oiliness prescription that discards tradition and to adopt water prescription be a kind of effective method that reduces cost.For example adopt LiFePO 4 as positive electrode, calculate every production 1Ah battery according to solid content 55%; Consume solvent NMP (N-pyrrolidones) 6.92g; According to 3.5 ten thousand yuan/ton the market price, with regard to one of NMP, every ampere-hour battery adopts water prescription can save 0.24 yuan.But the use of water prescription has but been paid battery capacity and cycle life as cost.
Summary of the invention
Technical problem to be solved by this invention provides a kind of lithium-ion-power cell water paste, effectively promotes battery capacity, prolongs battery cycle life.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: the lithium-ion-power cell water paste, to form by powder, solvent, binding agent and additive, and its mass percent is: powder: 40%～55%; Solvent: 40%～55%; Binding agent: 4～5%; Additive: 0.02%～2%, wherein said powder comprises active material and conductive agent.
Active material accounts for 85～95% (quality) in the said powder, and conductive agent accounts for 5～15% (quality).
As preferably, said active material is LiMO
2Perhaps LiMn
2O
4Perhaps LiFePO
4The perhaps modified material of above-mentioned substance, wherein LiMO
2In M be Ni or Mn or Co.
As preferably, said active material is material with carbon element or transition metal oxide or their combination.
As preferably, said conductive agent is a kind of in graphite, acetylene black, CNT, carbon fiber, the conducting polymer substance or their combination.
Said solvent is a deionized water.
Said binding agent is two or more the composition in acrylonitrile-butadiene rubber, butadiene-styrene rubber, butyl rubber, the polyvinyl acetate.
Said additive is a kind of in lithium sulfite, lithium hydroxide, lithium tetraborate, lithium fluoride, lithium carbonate, lithium bromide, the lithia or their combination.
Make the method for said lithium-ion-power cell water paste, may further comprise the steps:
Preliminary treatment, with active material, conductive agent respectively 120 ℃ and 200 ℃ of oven dry;
Premixed accurately mixes in weighing active material, conductive agent and additive to the batch mixer;
A certain amount of deionized water is measured in the preparation of glue, and after being heated to 90 ℃, adds a certain amount of binding agent, is stirred to whole dissolvings, vacuumizes and removes bubble;
The slurry preparation takes by weighing the glue that a certain amount of above-mentioned steps is prepared, and in glue, adds premixed powder, and dispersed with stirring vacuumizes and removes bubble and regulate viscosity, promptly gets said water paste.
The present invention through in prescription, having added active material, has effectively improved the cycle life of battery owing to adopted technique scheme; With respect to the oiliness prescription, used deionized water to reduce the battery manufacturing cost among the present invention as solvent; Having used water-base cement among the present invention, is a kind of a kind of material with adhesivity and plasticity, improves the performance and the pole piece manufacturing property of slurry.
Embodiment
Lithium-ion-power cell water paste of the present invention is made up of powder, solvent, binding agent and additive, and its mass percent is: powder: 40%～55%; Solvent: 40%～55%; Binding agent: 4～5%; Additive: 0.02%～2%.
Said powder comprises active material and conductive agent, and active material accounts for 85～95% of powder, and other parts are conductive agent, and active material can be that positive active material also can be a negative electrode active material, and positive active material comprises that (its chemical formula is LiMO to lamellar compound
2, wherein M is Ni, Mn, one or more among the Co), (chemical formula is LiMn to spinel compound
2O
4), (chemical formula is LiFePO to the olivine structural material
4) or the modified material of above-mentioned substance.Negative electrode active material comprises material with carbon element or transition metal oxide or their combination.Conductive agent is a kind of in graphite, acetylene black, CNT, carbon fiber, the conducting polymer substance or their combination.
Solvent is a deionized water, requires resistivity greater than 12M Ω cm (25 ℃).
Binding agent is the macromolecule mixture matter that a kind of existing bonding effect has plasticization again, like two or more compositions in acrylonitrile-butadiene rubber, butadiene-styrene rubber, butyl rubber, the polyvinyl acetate.
Additive is an inorganic additive, like one or more combinations in lithium sulfite, lithium hydroxide, lithium tetraborate, lithium fluoride, lithium carbonate, lithium bromide, the lithia.Through adding additive, adopt rational battery activated system, changed the composition among the SEI (solid electrolyte interface film), improved the content of inorganic matter among the SEI, improved the stability of SEI film, effectively improved the cycle life of battery.
Slurry preparation practical implementation method is following:
1, preliminary treatment is dried active material, conductive agent 8 hours at 120 ℃ and 200 ℃ respectively;
2, premixed accurately mixes in weighing active material, conductive agent and additive to the batch mixer;
3, a certain amount of deionized water is measured in the preparation of glue, and after being heated to 90 ℃, adds a certain amount of binding agent, is stirred to whole dissolvings, vacuumizes and removes bubble;
4, slurry preparation takes by weighing the glue that a certain amount of above-mentioned steps is prepared, and in glue, adds premixed powder in batches, and dispersed with stirring vacuumizes and removes bubble and regulate viscosity, promptly gets said water paste.
Slurry is cut into pole piece through coating, roll-in, branch, be assembled into electric core, fluid injection is sealed, and activates, and bleeding to seal obtains cell.The activation system is following: the 0.01C charging with 0.02C charging 6～12 hours, was changeed constant voltage charge 6～12 hours after 4～10 hours, and constant voltage values is between 2.3～3.5V.Wherein C is a method for expressing of lithium electricity industry, equals the capacity of battery on the numerical value, and unit is the unit of electric current.This activation system helps additive and forms stable SEI film, improves the cycle life of battery.
Embodiment 1
Accurately take by weighing the LiFePO4 of 50.00kg, the crystalline flake graphite of 0.94kg, the acetylene black of 1.50kg, the 0.024kg lithium sulfite is put into " V " type batch mixer mixing 30min.Take by weighing the deionized water of 50kg, be heated to 90 ℃, add acrylonitrile-butadiene rubber 1.20kg, butadiene-styrene rubber 1.00kg, being stirred to CL and being evacuated to does not have bubble in the glue.Divide then to join premixed powder in the glue for preparing for 4 times, be stirred to evenly, regulate viscosity, vacuumize.After slurry process coating after the filtration, roll-in, the film-making, make anode pole piece.
The oiliness slurry for preparing same weight needs the NMP (N-pyrrolidones) of 45Kg～50Kg.
Embodiment 2
Accurately take by weighing the negative pole graphite of 50.00kg, 0.53kg acetylene black, the 0.045kg lithium tetraborate is put into " V " type batch mixer mixing 30min.Take by weighing the deionized water of 50kg, be heated to 90 ℃, add acrylonitrile-butadiene rubber 1.20kg, butyl rubber 1.00kg, being stirred to CL and being evacuated to does not have bubble in the glue.Divide then to join premixed powder in the glue for preparing for 4 times, and be stirred to evenly, vacuumize.After slurry process coating after the filtration, roll-in, the film-making, make cathode pole piece.
Embodiment 1 is processed the electric core of 7Ah with embodiment 2 prepared pole pieces through adding barrier film, and fluid injection seals, leave standstill and activate, the activation system is: the 0.01C charging after 6 hours, was changeed constant voltage charge 8 hours with the 0.02C charging after 6 hours, and constant voltage is 3.0V.
Embodiment 3
Accurately take by weighing the LiFePO4 of 50.00kg, the crystalline flake graphite of 0.94kg, the acetylene black of 1.50kg, the 0.024kg lithium fluoride is put into " V " type batch mixer mixing 30min.Take by weighing the deionized water of 50kg, be heated to 90 ℃, add polyvinyl acetate 1.00kg, butadiene-styrene rubber 1.30kg, being stirred to CL and being evacuated to does not have bubble in the glue.Divide then to join premixed powder in the glue for preparing for 4 times, be stirred to evenly, vacuumize.Promptly get anodal water paste after the filtration.
Embodiment 4
Accurately take by weighing the LiFePO4 of 50.00kg, the crystalline flake graphite of 0.94kg, the acetylene black of 1.50kg, the 0.024kg lithium bromide is put into " V " type batch mixer mixing 30min.Take by weighing the deionized water of 50kg, be heated to 90 ℃, add acrylonitrile-butadiene rubber 1.20kg, butadiene-styrene rubber 1.00kg, being stirred to CL and being evacuated to does not have bubble in the glue.Divide then to join premixed powder in the glue for preparing for 4 times, and be stirred to evenly, vacuumize.Promptly get anodal water paste after the filtration.
Claims (9)
1. lithium-ion-power cell water paste, it is characterized in that: be made up of powder, solvent, binding agent and additive, its mass percent is: powder: 40%～55%; Solvent: 40%～55%; Binding agent: 4～5%; Additive: 0.02%～2%, wherein said powder comprises active material and conductive agent.
2. according to the said lithium-ion-power cell water paste of claim 1, it is characterized in that: active material accounts for 85～95% (quality) in the said powder, and conductive agent accounts for 5～15% (quality).
3. according to the said lithium-ion-power cell water paste of claim 2, it is characterized in that: said active material is LiMO
2Perhaps LiMn
2O
4Perhaps LiFePO
4The perhaps modified material of above-mentioned substance, wherein LiMO
2In M be Ni or Mn or Co.
4. according to the said lithium-ion-power cell water paste of claim 2, it is characterized in that: said active material is material with carbon element or transition metal oxide or their combination.
5. according to the said lithium-ion-power cell water paste of claim 2, it is characterized in that: said conductive agent is a kind of in graphite, acetylene black, CNT, carbon fiber, the conducting polymer substance or their combination.
6. according to the said lithium-ion-power cell water paste of claim 1, it is characterized in that: said solvent is a deionized water.
7. according to the said lithium-ion-power cell water paste of claim 1, it is characterized in that: said binding agent is two or more the composition in acrylonitrile-butadiene rubber, butadiene-styrene rubber, butyl rubber, the polyvinyl acetate.
8. according to the said lithium-ion-power cell water paste of claim 1, it is characterized in that: said additive is a kind of in lithium sulfite, lithium hydroxide, lithium tetraborate, lithium fluoride, lithium carbonate, lithium bromide, the lithia or their combination.
9. make the method for the said lithium-ion-power cell water paste of claim 1, it is characterized in that: may further comprise the steps:
Preliminary treatment, with active material, conductive agent respectively 120 ℃ and 200 ℃ of oven dry;
Premixed accurately mixes in weighing active material, conductive agent and additive to the batch mixer;
A certain amount of deionized water is measured in the preparation of glue, and after being heated to 90 ℃, adds a certain amount of binding agent, is stirred to whole dissolvings, vacuumizes and removes bubble;
The slurry preparation takes by weighing the glue that a certain amount of above-mentioned steps is prepared, and in glue, adds premixed powder, and dispersed with stirring vacuumizes and removes bubble and regulate viscosity, promptly gets said water paste.
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Cited By (16)
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|---|---|---|---|---|
| CN103579579A (en) * | 2012-08-06 | 2014-02-12 | 万向电动汽车有限公司 | Lithium ion battery aqueous anode slurry and preparation method thereof |
| CN104037418A (en) * | 2013-03-05 | 2014-09-10 | 中国科学院宁波材料技术与工程研究所 | Lithium ion battery anode film, preparation and application thereof |
| CN105261794A (en) * | 2015-10-20 | 2016-01-20 | 四川科能锂电有限公司 | Lithium battery processing technology |
| CN105470464A (en) * | 2015-11-02 | 2016-04-06 | 万向A一二三系统有限公司 | Preparation method of lithium ion battery negative electrode for reducing irreversible capacity loss |
| CN105470462A (en) * | 2015-03-27 | 2016-04-06 | 万向A一二三系统有限公司 | Preparation method of negative electrode for lithium-ion battery |
| CN105470476A (en) * | 2015-11-02 | 2016-04-06 | 万向A一二三系统有限公司 | Lithium ion battery negative electrode for reducing irreversible capacity loss and preparation method of lithium ion battery negative electrode |
| CN105552374A (en) * | 2016-03-11 | 2016-05-04 | 中物院成都科学技术发展中心 | Carbon anode material for high-power lithium ion battery and preparation method of carbon anode material |
| CN106159208A (en) * | 2016-06-29 | 2016-11-23 | 珠海光宇电池有限公司 | Improve method and the cathode of lithium battery of lithium battery first charge-discharge efficiency |
| CN104681790B (en) * | 2013-11-27 | 2017-03-08 | 万向一二三股份公司 | A kind of preparation method of lithium ion power battery cathode material slurry |
| CN104662712B (en) * | 2012-09-27 | 2017-04-12 | 丰田自动车株式会社 | Electrode paste production method and secondary battery |
| CN106972193A (en) * | 2017-03-27 | 2017-07-21 | 湖北猛狮新能源科技有限公司 | A kind of high magnification fills the preparation method of lithium ion battery soon |
| CN107123808A (en) * | 2016-02-25 | 2017-09-01 | Tdk株式会社 | Lithium rechargeable battery |
| CN107204467A (en) * | 2017-06-13 | 2017-09-26 | 中国电子新能源（武汉）研究院有限责任公司 | Sodium-ion battery cathode size, negative plate and battery |
| CN107658426A (en) * | 2017-09-14 | 2018-02-02 | 合肥国轩高科动力能源有限公司 | Lithium ion battery aqueous positive plate and preparation process thereof |
| CN107819108A (en) * | 2017-11-06 | 2018-03-20 | 贵州省铜仁华迪斯新能源有限公司 | Ternary electrode slurry, ternary electrode piece and preparation method |
| CN108232121A (en) * | 2017-12-29 | 2018-06-29 | 惠州亿纬锂能股份有限公司 | A kind of pole piece and preparation method thereof |
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| CN103579579B (en) * | 2012-08-06 | 2016-12-21 | 万向电动汽车有限公司 | A kind of lithium ion battery aqueous positive-pole slurry and preparation method thereof |
| CN103579579A (en) * | 2012-08-06 | 2014-02-12 | 万向电动汽车有限公司 | Lithium ion battery aqueous anode slurry and preparation method thereof |
| CN104662712B (en) * | 2012-09-27 | 2017-04-12 | 丰田自动车株式会社 | Electrode paste production method and secondary battery |
| CN104037418A (en) * | 2013-03-05 | 2014-09-10 | 中国科学院宁波材料技术与工程研究所 | Lithium ion battery anode film, preparation and application thereof |
| CN109659496A (en) * | 2013-03-05 | 2019-04-19 | 中国科学院宁波材料技术与工程研究所 | A kind of lithium ion cell positive film and its preparation and application |
| CN104681790B (en) * | 2013-11-27 | 2017-03-08 | 万向一二三股份公司 | A kind of preparation method of lithium ion power battery cathode material slurry |
| CN105470462A (en) * | 2015-03-27 | 2016-04-06 | 万向A一二三系统有限公司 | Preparation method of negative electrode for lithium-ion battery |
| CN105261794A (en) * | 2015-10-20 | 2016-01-20 | 四川科能锂电有限公司 | Lithium battery processing technology |
| CN105470476A (en) * | 2015-11-02 | 2016-04-06 | 万向A一二三系统有限公司 | Lithium ion battery negative electrode for reducing irreversible capacity loss and preparation method of lithium ion battery negative electrode |
| CN105470464B (en) * | 2015-11-02 | 2018-06-22 | 万向一二三股份公司 | A kind of negative electrode of lithium ion battery preparation method for reducing irreversible capacity loss |
| CN105470476B (en) * | 2015-11-02 | 2018-06-22 | 万向一二三股份公司 | A kind of negative electrode of lithium ion battery for reducing irreversible capacity loss and preparation method thereof |
| CN105470464A (en) * | 2015-11-02 | 2016-04-06 | 万向A一二三系统有限公司 | Preparation method of lithium ion battery negative electrode for reducing irreversible capacity loss |
| CN107123808A (en) * | 2016-02-25 | 2017-09-01 | Tdk株式会社 | Lithium rechargeable battery |
| CN105552374A (en) * | 2016-03-11 | 2016-05-04 | 中物院成都科学技术发展中心 | Carbon anode material for high-power lithium ion battery and preparation method of carbon anode material |
| CN105552374B (en) * | 2016-03-11 | 2018-10-30 | 中物院成都科学技术发展中心 | A kind of high power type lithium ion cell carbon negative pole material and preparation method thereof |
| CN106159208A (en) * | 2016-06-29 | 2016-11-23 | 珠海光宇电池有限公司 | Improve method and the cathode of lithium battery of lithium battery first charge-discharge efficiency |
| CN106972193A (en) * | 2017-03-27 | 2017-07-21 | 湖北猛狮新能源科技有限公司 | A kind of high magnification fills the preparation method of lithium ion battery soon |
| CN107204467A (en) * | 2017-06-13 | 2017-09-26 | 中国电子新能源（武汉）研究院有限责任公司 | Sodium-ion battery cathode size, negative plate and battery |
| CN107658426A (en) * | 2017-09-14 | 2018-02-02 | 合肥国轩高科动力能源有限公司 | Lithium ion battery aqueous positive plate and preparation process thereof |
| CN107819108A (en) * | 2017-11-06 | 2018-03-20 | 贵州省铜仁华迪斯新能源有限公司 | Ternary electrode slurry, ternary electrode piece and preparation method |
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