CN104733689B - Preparation method for lithium iron phosphate positive electrode of lithium ion battery - Google Patents
Preparation method for lithium iron phosphate positive electrode of lithium ion battery Download PDFInfo
- Publication number
- CN104733689B CN104733689B CN201310710453.9A CN201310710453A CN104733689B CN 104733689 B CN104733689 B CN 104733689B CN 201310710453 A CN201310710453 A CN 201310710453A CN 104733689 B CN104733689 B CN 104733689B
- Authority
- CN
- China
- Prior art keywords
- preparation
- lifepo4
- iron phosphate
- lithium ion
- ion battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1397—Processes of manufacture of electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
-
- 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
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
-
- 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
Abstract
The invention discloses a preparation method for a lithium iron phosphate positive electrode of a lithium ion battery. The preparation method overcomes the problems of uneasy dispersion of solid components and hard thorough drying of positive electrodes in preparation of lithium iron phosphate positive electrodes of lithium ion batteries in the prior art. The preparation method mainly comprises the following steps: (1) weighing materials; (2) preparation of a premix; (3) primary dispersion; (4) secondary dispersion; (5) slow stirring; (6) coating; and (7) drying in segments. The preparation method provided by the invention has the advantages of simple steps, uniform dispersion of each solid component in the process of preparation and thorough drying of pole pieces; and the battery prepared from the positive electrode has good electrochemical performance.
Description
Technical field
The present invention relates to technical field of lithium ion, more particularly, to a kind of system of cathode of lithium iron phosphate lithium ion battery
Preparation Method.
Background technology
Current species and processing technique according to solvent in lithium iron phosphate battery anode formula slurry, anode sizing agent can divide oil
System（NMP is used as solvent）Slurry and water system（Deionized water is used as solvent）Slurry, aqueous slurry is due to being not related to solvent recovery
And problem of environmental pollution, and low price, it is homogenized the advantages of receiving environmental constraints less and is subject to big how many lithium cell factories favors,
But the solid matters such as conductive agent, positive active material in aqueous positive-pole slurry are difficult dispersed so that aqueous positive-pole is starched
The concordance of material is poor, and stability is not high, and sedimentation easily occurs, and so as to cause battery reversible capacity less, cycle performance is not good, greatly
Battery capacity and cycle life are have impact on greatly, therefore the solid matter being badly in need of in solution water paste is in aqueous positive-pole slurry
Scattering problem, in addition, when the lithium iron phosphate battery anode using water paste is prepared, being all generally freeze-day with constant temperature, just causing
Pole is difficult to be completely dried.
For example, Chinese patent application publication No.：CN102306782A, Shen Qing Publication day：On January 4th, 2012, disclose one
Plant lithium iron phosphate battery anode and preparation method thereof, component of the positive pole comprising following weight percents：Aqueous binders 0.5%
～1%；Conductive agent 1%～3%；Crystalline flake graphite 0.5%～2%；LiFePO4 90%～97%；Water-base cement 1%～3%, the preparation of the positive pole
Method is that each component is put in blender by high speed and stirring at low speed mix homogeneously.Which is disadvantageous in that first, this is just
Binding agent in the formula of pole is modified polyethylene glycol oxide, and the polyethylene glycol oxide adhesion strength that is modified is inadequate, it is therefore desirable to by adding
Improving adhesion strength, and after adding water-base cement, in slurry, each solid constituent is less susceptible to dispersion to water-base cement, and slurry is steady
It is qualitative not high, easily there is sedimentation, cause that battery reversible capacity is less, cycle performance is not good, leverages battery capacity and follows
The ring life-span.
The content of the invention
The present invention is to solve the cathode of lithium iron phosphate lithium ion battery of prior art each solid group in preparation process
Divide and be difficult dispersion, positive pole is difficult the problem being completely dried, there is provided a kind of preparation method of cathode of lithium iron phosphate lithium ion battery,
The preparation method processing step is simple, and in preparation process, each solid constituent is uniformly dispersed, and pole piece is dried thoroughly, is obtained using of the invention
Battery performance made by the positive pole for arriving is good.
To achieve these goals, the present invention is employed the following technical solutions：
A kind of preparation method of cathode of lithium iron phosphate lithium ion battery, comprises the following steps：
（1）Weighing：In terms of the gross mass of anode sizing agent, each component is weighed by following weight/mass percentage composition：LiFePO4 45 ~
50%, conductive agent 2 ~ 3%, aqueous binders 2 ~ 3%, ethanol 3 ~ 5%, balance of deionized water.Water paste is adopted in the present invention, should
Cost of sizing agent is low, and stability is excellent with dispersibility, and obtained battery performance is good.
（2）It is prepared by premix material：After ethanol is mixed homogeneously with conductive agent, aqueous binders and portions of de-ionized water are added,
Fineness of materials is milled to for 5 ~ 10 μm, premix material is obtained.It is very crucial the step of batch mixing in the present invention, must first by second in the present invention
Alcohol is mixed with conductive agent, due to conductive agent it is difficult to dispersed in water, is first mixed ethanol with conductive agent, is moistened can ethanol
Conductive agent, is conducive to conductive agent in the slurry dispersed, so as to uniformly be wrapped in lithium iron phosphate particles surface, and slurry
Middle addition ethanol, during high-speed stirred, slurry is not likely to produce bubble, takes off without the need for vacuum is carried out to slurry in subsequent process
Bubble process, technique is simplified, while ethanol also acts as the effect of anti-settling, can improve the stability and concordance of slurry.
（3）Once disperse：Fineness of materials is milled to after LiFePO4 is added in premix material for 5 ~ 10 μm.Once dispersion is adopted
With the mode of ball milling, granule is fully pulverized and become little particle, otherwise during follow-up twice dispersing, material is still big
Granule.
（4）Twice dispersing：By step（3）In material add planetary pulp blender in add the deionization of surpluses
Water, high-speed stirred to fineness are 10 ~ 30 μm.Remaining deionized water is initially charged during twice dispersing with diluted material, then by height
Speed stirring makes each component quick in water phase, dispersed, and the Stability of Slurry for so obtaining is good with concordance.
（5）Slowly stir：By step（4）In material 20 ~ 30min of stirring at low speed after cross 120 ~ 200 mesh sieves, obtain LiFePO4 water
Property anode sizing agent.
（6）Coating：LiFePO4 aqueous positive-pole slurry is coated uniformly on into positive collection liquid surface.
（7）Segmentation drying：By step（6）The positive collector for obtaining is placed in after being dried 5 ~ 7h at 85 ~ 90 DEG C, at room temperature certainly
So 30 ~ 60min of cooling, then dry 12 ~ 14h at 70 ~ 80 DEG C, obtains final product cathode of lithium iron phosphate lithium ion battery Jing after pressure roller.This
Invention is dried to pole piece by the way of segmentation drying, and in early stage pole piece, moisture is more, therefore can adopt the fast rapid-curing cutback of high temperature
Dry mode makes moisture evaporate rapidly, but baking temperature is too high, and drying time is long, can cause the drying of pole piece excessively,
Make coating crackle occur, dry linting phenomenon can be caused, dry linting phenomenon can be caused, after pole piece high temperature drying premenstruum, pole piece becomes
Firmly, the moisture inside pole piece can be prevented from discharging, therefore moisture slowing to external migration, rate of drying is more and more slower,
Be unfavorable for being completely dried for pole piece, mid-term by pole piece 30 ~ 60min of natural cooling at room temperature, can make pole piece internal moisture to
Outside transmission, is conducive to being completely dried for pole piece, later stage to carry out cold drying, the moisture in pole piece is fully removed.Segmentation is dry
It is dry to be completely dried pole piece, the chemical property of battery can be improved.
Preferably, the conductive agent be conductive black, superconduction carbon, electrically conductive graphite, crystalline flake graphite, in CNT one
Plant or various.
Preferably, the aqueous binders are by sodium alginate and acrylonitrile multiple copolymer LA133 in mass ratio 3:5~7
Mix.Sodium alginate and acrylonitrile multiple copolymer LA133 coordinated, bond effect is good, and low cost, sodium alginate
Except cementation, can also be filled in the gap between LiFePO4, support and buffering are provided for LiFePO4, be prevented effectively from
The aggregate that LiFePO4 is formed occurs to crush in roll-in, so as to improve the processing characteristics of electrode slice, while sodium alginate is also
Can make to be in close contact between LiFePO4 and binding agent, conductive agent, it is to avoid the polarization of pole piece, be conducive to improving chemical property.
Preferably, step（2）The quality of middle portions of de-ionized water for deionized water gross mass 30 ~ 40%.
Preferably, step（4）High speed stirring process conditions be：Revolution 20 ~ 50r/min, 1800 ~ 2500r/ of rotation
min。
Preferably, step（5）The process conditions of middle stirring at low speed are：Revolution 20 ~ 50r/min, 1000 ~ 1500r/ of rotation
min。
Preferably, step（7）During middle segmentation drying, front 5 ~ 8h once, is taken out every 3 ~ 4h afterwards every 1 ~ 2h evacuation
Vacuum is once.In stage drying, evacuation can improve drying effect to remove the moisture in dry environment.
Therefore, the invention has the beneficial effects as follows：
（1）Using ball milling and the scattered mode of high-speed stirred, and formula of size is optimized, the slurry for obtaining is stable
Property, concordance are good；
（2）Using the drying mode of stage drying, pole piece is dried complete.
Description of the drawings
Fig. 1 be capacity made by positive pole that embodiment 1 is obtained for 1500mAh lithium ion battery at 20 ± 5 DEG C, with 1C/
Loop test figure of the 1C charge-discharge magnifications in the voltage range of 3.0 ~ 4.2V.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description.
In the present invention, if not refering in particular to, all percentage ratios are unit of weight, and all devices and raw material can be purchased from market
Or the industry it is conventional, the method in following embodiments if no special instructions, is this area conventional method.
Embodiment 1
（1）Weighing：In terms of the gross mass of anode sizing agent, each component is weighed by following weight/mass percentage composition：LiFePO4
45%, conductive agent 2%, aqueous binders 2%, ethanol 3%, deionized water 48%, wherein conductive agent be conductive carbon black, aqueous binders
By sodium alginate and acrylonitrile multiple copolymer LA133 in mass ratio 3:5 mix.
（2）It is prepared by premix material：After ethanol is mixed homogeneously with conductive agent, aqueous binders and portions of de-ionized water are added,
Fineness of materials is milled to for 5 μm, premix material is obtained, wherein, the quality of portions of de-ionized water is the 40% of deionized water gross mass.
（3）Once disperse：Fineness of materials is milled to after LiFePO4 is added in premix material for 5 μm.
（4）Twice dispersing：By step（3）In material add planetary pulp blender in add the deionization of surpluses
Water, high-speed stirred to fineness are 10 μm, and the process conditions of high-speed stirred are：Revolution 20r/min, rotation 1800r/min.
（5）Slowly stir：By step（4）In material stirring at low speed 20min after cross 200 mesh sieves, obtain LiFePO4 aqueous positive-pole
Slurry.
（6）Coating：LiFePO4 aqueous positive-pole slurry is coated uniformly on into positive collection liquid surface.
（7）Segmentation drying：By step（6）The positive collector for obtaining is placed in after being dried h at 85 DEG C, at room temperature natural cooling
30min, then 14h is dried at 70 DEG C, cathode of lithium iron phosphate lithium ion battery is obtained final product Jing after pressure roller, during segmentation drying, front 8h is every
Every 2h evacuation once, afterwards every 4h evacuation once.
The positive pole for obtaining is made into model 495148, nominal capacity is the lithium ion battery of 1500mAh, at 20 ± 5 DEG C,
Test is circulated with 1C/1C charge-discharge magnifications in the voltage range of 3.0 ~ 4.2V, the loop test figure such as Fig. 1 institutes for obtaining
Show.
It will be seen from figure 1 that battery is in the voltage range of 3.0 ~ 4.2V, protected with the capacity after 1C circulations 300 times
Holdup can be maintained at 89% of initial capacity or so, illustrate that the cycle performance of battery is good, that is to say, that by obtained in the present invention
Just having excellent chemical property.
Embodiment 2
（1）Weighing：In terms of the gross mass of anode sizing agent, each component is weighed by following weight/mass percentage composition：LiFePO4
47%, conductive agent 2.7%, aqueous binders 2.6%, ethanol 4%, wherein deionized water 43.7%, conductive agent are that conductive carbon black and carbon are received
Mitron（Mass ratio 1：2）, aqueous binders are by sodium alginate and acrylonitrile multiple copolymer LA133 in mass ratio 3:6 mixing and
Into.
（2）It is prepared by premix material：After ethanol is mixed homogeneously with conductive agent, aqueous binders and portions of de-ionized water are added,
Fineness of materials is milled to for 7 μm, premix material is obtained, wherein, the quality of portions of de-ionized water is the 35% of deionized water gross mass.
（3）Once disperse：Fineness of materials is milled to after LiFePO4 is added in premix material for 6 μm.
（4）Twice dispersing：By step（3）In material add planetary pulp blender in add the deionization of surpluses
Water, high-speed stirred to fineness are 15 μm, and the process conditions of high-speed stirred are：Revolution 25r/min, rotation 2000r/min.
（5）Slowly stir：By step（4）In material stirring at low speed 25min after cross 150 mesh sieves, obtain LiFePO4 aqueous positive-pole
Slurry.
（6）Coating：LiFePO4 aqueous positive-pole slurry is coated uniformly on into positive collection liquid surface.
（7）Segmentation drying：By step（6）The positive collector for obtaining is placed in after being dried 6h at 87 DEG C, naturally cold at room temperature
But 35min, then 13h is dried at 75 DEG C, cathode of lithium iron phosphate lithium ion battery is obtained final product Jing after pressure roller, during segmentation drying, front 6h
Every 1.5h evacuation once, afterwards every 3.5h evacuation once.
The positive pole for obtaining is made into model 495148, nominal capacity is the lithium ion battery of 1500mAh, at 20 ± 5 DEG C,
Test is circulated with 1C/1C charge-discharge magnifications in the voltage range of 3.0 ~ 4.2V, the loop test figure for obtaining and Fig. 1 phases
Seemingly, thus here is not repeated.
Embodiment 3
（1）Weighing：In terms of the gross mass of anode sizing agent, each component is weighed by following weight/mass percentage composition：LiFePO4
50%, conductive agent 3%, aqueous binders 3%, ethanol 5%, deionized water 39%, wherein conductive agent be conductive carbon black, CNT and
Crystalline flake graphite（Mass ratio 1：2：1）, aqueous binders are by sodium alginate and acrylonitrile multiple copolymer LA133 in mass ratio 3:2
Mix,.
（2）It is prepared by premix material：After ethanol is mixed homogeneously with conductive agent, aqueous binders and portions of de-ionized water are added,
Fineness of materials is milled to for 10 μm, premix material is obtained, wherein, the quality of portions of de-ionized water is the 30% of deionized water gross mass.
（3）Once disperse：Fineness of materials is milled to after LiFePO4 is added in premix material for 10 μm.
（4）Twice dispersing：By step（3）In material add planetary pulp blender in add the deionization of surpluses
Water, high-speed stirred to fineness are 10 μm, and the process conditions of high-speed stirred are：Revolution 50r/min, rotation 2500r/min.
（5）Slowly stir：By step（4）In material stirring at low speed 30min after cross 120 mesh sieves, obtain LiFePO4 aqueous positive-pole
Slurry.
（6）Coating：LiFePO4 aqueous positive-pole slurry is coated uniformly on into positive collection liquid surface.
（7）Segmentation drying：By step（6）The positive collector for obtaining is placed in after being dried 5h at 90 DEG C, naturally cold at room temperature
But 60min, then 12h is dried at 80 DEG C, cathode of lithium iron phosphate lithium ion battery is obtained final product Jing after pressure roller, during segmentation drying, front 5h
Every 1h evacuation once, afterwards every 3h evacuation once.
The positive pole for obtaining is made into model 495148, nominal capacity is the lithium ion battery of 1500mAh, at 20 ± 5 DEG C,
Test is circulated with 1C/1C charge-discharge magnifications in the voltage range of 3.0 ~ 4.2V, the loop test figure for obtaining and Fig. 1 phases
Seemingly, thus here is not repeated.
Embodiment described above is one kind preferably scheme of the present invention, not the present invention is made any pro forma
Limit, also have other variants and remodeling on the premise of without departing from the technical scheme described in claim.
Claims (7)
1. a kind of preparation method of cathode of lithium iron phosphate lithium ion battery, it is characterised in that comprise the following steps：
（1）Weighing：In terms of the gross mass of anode sizing agent, each component is weighed by following weight/mass percentage composition：LiFePO4 45 ~ 50%,
Conductive agent 2 ~ 3%, aqueous binders 2 ~ 3%, ethanol 3 ~ 5%, balance of deionized water；
（2）It is prepared by premix material：After ethanol is mixed homogeneously with conductive agent, aqueous binders and portions of de-ionized water, ball milling are added
It is 5 ~ 10 μm to fineness of materials, obtains premix material；
（3）Once disperse：Fineness of materials is milled to after LiFePO4 is added in premix material for 5 ~ 10 μm；
（4）Twice dispersing：By step（3）In material add planetary pulp blender in add the deionized water of surpluses,
High-speed stirred to fineness is 10 ~ 30 μm；
（5）Slowly stir：By step（4）In material 20 ~ 30min of stirring at low speed after cross 120 ~ 200 mesh sieves, just obtaining LiFePO4 aqueouss
Pole slurry；
（6）Coating：LiFePO4 aqueous positive-pole slurry is coated uniformly on into positive collection liquid surface；
（7）Segmentation drying：By step（6）The positive collector for obtaining is placed in after being dried 5 ~ 7h at 85 ~ 90 DEG C, naturally cold at room temperature
But 30 ~ 60min, then dry 12 ~ 14h at 70 ~ 80 DEG C, obtains final product cathode of lithium iron phosphate lithium ion battery Jing after pressure roller.
2. preparation method according to claim 1, it is characterised in that the conductive agent is conductive black, superconduction carbon, conduction
One or more in graphite, CNT.
3. preparation method according to claim 1, it is characterised in that the aqueous binders are by sodium alginate and acrylonitrile
Multiple copolymer LA133 in mass ratio 3:5 ~ 7 mix.
4. preparation method according to claim 1, it is characterised in that step（2）The quality of middle portions of de-ionized water is to go
The 30 ~ 40% of ionized water gross mass.
5. preparation method according to claim 1, it is characterised in that step（4）High speed stirring process conditions be：It is public
Turn 20 ~ 50r/min, 1800 ~ 2500r/min of rotation.
6. preparation method according to claim 1, it is characterised in that step（5）The process conditions of middle stirring at low speed are：It is public
Turn 20 ~ 50r/min, 1000 ~ 1500r/min of rotation.
7. preparation method according to claim 1, it is characterised in that step（7）During middle segmentation drying, front 5 ~ 8h every 1 ~
2h evacuation once, every 3 ~ 4h evacuation once afterwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310710453.9A CN104733689B (en) | 2013-12-20 | 2013-12-20 | Preparation method for lithium iron phosphate positive electrode of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310710453.9A CN104733689B (en) | 2013-12-20 | 2013-12-20 | Preparation method for lithium iron phosphate positive electrode of lithium ion battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104733689A CN104733689A (en) | 2015-06-24 |
| CN104733689B true CN104733689B (en) | 2017-04-19 |
Family
ID=53457354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310710453.9A Active CN104733689B (en) | 2013-12-20 | 2013-12-20 | Preparation method for lithium iron phosphate positive electrode of lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104733689B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106981685A (en) * | 2016-12-11 | 2017-07-25 | 长兴天晟能源科技有限公司 | A kind of lithium ion cell electrode piece baking process containing aqueous binders |
| CN106981623B (en) * | 2017-04-25 | 2019-09-20 | 河北工业大学 | A kind of power lithium ion battery pole piece slurry production line |
| CN109560246B (en) * | 2018-11-27 | 2021-12-14 | 惠州亿纬锂能股份有限公司 | Lithium battery and preparation method thereof |
| CN109698338A (en) * | 2018-12-26 | 2019-04-30 | 湖北锂诺新能源科技有限公司 | A kind of powerful graphene-based LiFePO4 pole piece of low cost and preparation method |
| CN112259717A (en) * | 2020-10-14 | 2021-01-22 | 安徽益佳通电池有限公司 | Dry-mixing preparation method of lithium ion battery anode slurry |
| CN113809322B (en) * | 2021-08-10 | 2022-12-02 | 福建巨电新能源股份有限公司 | Water-based lithium iron phosphate battery, positive electrode slurry thereof and preparation method of positive electrode slurry |
| CN114361714A (en) * | 2021-12-06 | 2022-04-15 | 惠州市旭然新能源有限公司 | Coating slurry, preparation method thereof, composite porous diaphragm prepared from coating slurry and lithium ion battery |
| CN114614007B (en) * | 2022-02-17 | 2023-07-21 | 东莞凯德新能源有限公司 | Positive electrode slurry of lithium ion battery and preparation method thereof |
| CN114682349A (en) * | 2022-03-14 | 2022-07-01 | 广西燚能新能源有限公司 | Manufacturing method for improving water system lithium iron phosphate battery positive plate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1734825A (en) * | 2005-08-08 | 2006-02-15 | 河南环宇集团有限公司 | Preparation method for high rate phosphate lithium ion battery and battery prepared thereby |
| CN102683034A (en) * | 2012-04-28 | 2012-09-19 | 中国科学院电工研究所 | Method for preparing super capacitor electrode plate |
-
2013
- 2013-12-20 CN CN201310710453.9A patent/CN104733689B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1734825A (en) * | 2005-08-08 | 2006-02-15 | 河南环宇集团有限公司 | Preparation method for high rate phosphate lithium ion battery and battery prepared thereby |
| CN102683034A (en) * | 2012-04-28 | 2012-09-19 | 中国科学院电工研究所 | Method for preparing super capacitor electrode plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104733689A (en) | 2015-06-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104733689B (en) | Preparation method for lithium iron phosphate positive electrode of lithium ion battery | |
| CN103579579B (en) | A kind of lithium ion battery aqueous positive-pole slurry and preparation method thereof | |
| CA3035900C (en) | Micro-capsule type silicon-carbon composite negative electrode material and preparing method and use thereof | |
| CN106207129B (en) | A kind of preparation method of anode slurry of high-rate | |
| CN103943851B (en) | A kind of LiFePO4 aqueous positive-pole slurry and preparation method thereof | |
| CN106711461A (en) | Spherical porous silicon/carbon composite material as well as preparation method and application thereof | |
| CN109411713B (en) | Mechanical co-coating method of silicon-containing base material, silicon-containing base material and lithium ion battery | |
| WO2016169289A1 (en) | Method for preparing lithium ion battery negative electrode slurry | |
| CN110993884B (en) | Lithium ion battery negative electrode slurry, preparation method, negative electrode plate and battery | |
| CN112635712A (en) | Negative plate and lithium ion battery | |
| CN107394206A (en) | A kind of lithium ion battery aqueous positive-pole slurry and preparation method thereof | |
| CN109461921A (en) | A kind of preparation method based on modified lithium ion battery silicon-base alloy composite negative pole material | |
| Liu et al. | Blended spherical lithium iron phosphate cathodes for high energy density lithium–ion batteries | |
| CN102569733B (en) | The preparation method of pulp of lithium ion battery, cell size and lithium ion battery | |
| CN108598386A (en) | Iron manganese phosphate for lithium base composite positive pole and preparation method thereof | |
| CN107732150A (en) | Negative electrode of lithium ion battery and preparation method thereof and lithium ion battery | |
| CN106450186A (en) | Preparation method for lithium manganese silicate/carbon composite material used as positive electrode material of lithium ion battery, and positive electrode slurry and application | |
| CN108899469A (en) | A kind of lithium ion battery negative material slurry and preparation method thereof | |
| CN102544511A (en) | Lithium ion battery positive electrode lithium ferrous phosphate material wrapped with strontium cerium doped cobaltate (SCC) and carbon, and preparation method for lithium ion battery positive electrode lithium ferrous phosphate material | |
| CN112072064A (en) | Method for improving stability and dispersibility of lithium ion battery cathode slurry | |
| CN102403511A (en) | Lithium ion battery cathode material lanthanum strontium cobalt oxide and carbon coated lithium iron phosphate and preparation method thereof | |
| CN113540467B (en) | Blending type polyvinyl alcohol-based binder and preparation method and application thereof | |
| CN105047874A (en) | Preparation method of lithium iron phosphate battery cathode material | |
| TW202124272A (en) | Composite graphene conductive agent, method for preparing conductive paste with high conductivity by using the same and lithium battery prepared therefrom including carbon black, carbon nanotubes and graphene which are in the mass ratio of (1 to 4):(0.5 to 4.5):(1 to 3.5) | |
| CN105047873A (en) | Preparation method of carbon-coated lithium manganese borate composite cathode material of lithium ion battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 315800 standard workshop No. 2 of the 0212 massif in the West Zone of the Ningbo Free Trade Zone, Zhejiang Patentee after: Ningbo Veken Battery Co., Ltd. Address before: 315800 No. 5 West Avenue, Beilun Free Trade Zone, Ningbo, Zhejiang Patentee before: Ningbo Veken Battery Co., Ltd. |
|
| CP03 | Change of name, title or address | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190402 Address after: 315800 Factory Building-1 North Side of No.3 Gangxi Avenue, Ningbo Bonded West District, Zhejiang Province Patentee after: Ningbo Vico Amperex Technology Limited Address before: 315800 Standard Workshop No. 2, 0212 Block, West Ningbo Free Trade Zone, Zhejiang Province Patentee before: Ningbo Veken Battery Co., Ltd. |
|
| TR01 | Transfer of patent right |