CN101241988A - A making method for anode slice of lithium ion battery - Google Patents
A making method for anode slice of lithium ion battery Download PDFInfo
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- CN101241988A CN101241988A CNA200810066074XA CN200810066074A CN101241988A CN 101241988 A CN101241988 A CN 101241988A CN A200810066074X A CNA200810066074X A CN A200810066074XA CN 200810066074 A CN200810066074 A CN 200810066074A CN 101241988 A CN101241988 A CN 101241988A
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- Prior art keywords
- binding agent
- ion battery
- lithium ion
- molecular
- lithium
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000011230 binding agent Substances 0.000 claims description 79
- -1 polyethylene Polymers 0.000 claims description 13
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 11
- 229910052744 lithium Inorganic materials 0.000 claims description 11
- 239000002202 Polyethylene glycol Substances 0.000 claims description 7
- 229920001223 polyethylene glycol Polymers 0.000 claims description 7
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 7
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 7
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 5
- 108010010803 Gelatin Proteins 0.000 claims description 3
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 claims description 3
- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- 239000002033 PVDF binder Substances 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 229920002367 Polyisobutene Polymers 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 229920001328 Polyvinylidene chloride Polymers 0.000 claims description 3
- 229920002125 Sokalan® Polymers 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- KFDQGLPGKXUTMZ-UHFFFAOYSA-N [Mn].[Co].[Ni] Chemical class [Mn].[Co].[Ni] KFDQGLPGKXUTMZ-UHFFFAOYSA-N 0.000 claims description 3
- DJZIBVUGARDLOC-UHFFFAOYSA-N [Ni]=O.[Co]=O.[Li] Chemical class [Ni]=O.[Co]=O.[Li] DJZIBVUGARDLOC-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 229920000159 gelatin Polymers 0.000 claims description 3
- 239000008273 gelatin Substances 0.000 claims description 3
- 235000019322 gelatine Nutrition 0.000 claims description 3
- 235000011852 gelatine desserts Nutrition 0.000 claims description 3
- 229920002521 macromolecule Polymers 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- 239000004584 polyacrylic acid Substances 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 239000002861 polymer material Substances 0.000 claims description 3
- 229920006324 polyoxymethylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 239000005033 polyvinylidene chloride Substances 0.000 claims description 3
- LSGOVYNHVSXFFJ-UHFFFAOYSA-N vanadate(3-) Chemical compound [O-][V]([O-])([O-])=O LSGOVYNHVSXFFJ-UHFFFAOYSA-N 0.000 claims description 3
- 125000002467 phosphate group Chemical class [H]OP(=O)(O[H])O[*] 0.000 claims 1
- 239000000853 adhesive Substances 0.000 abstract description 8
- 230000001070 adhesive effect Effects 0.000 abstract description 8
- 239000011248 coating agent Substances 0.000 abstract description 6
- 238000000576 coating method Methods 0.000 abstract description 6
- 238000002156 mixing Methods 0.000 abstract description 6
- 238000007796 conventional method Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 239000002904 solvent Substances 0.000 description 13
- 230000000694 effects Effects 0.000 description 10
- 238000003556 assay Methods 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 9
- 239000003292 glue Substances 0.000 description 8
- 239000000843 powder Substances 0.000 description 8
- 239000006258 conductive agent Substances 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 239000010405 anode material Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 229910052493 LiFePO4 Inorganic materials 0.000 description 2
- ZVKRVGZVXQYLPZ-UHFFFAOYSA-N [Li].[V].P(O)(O)(O)=O Chemical compound [Li].[V].P(O)(O)(O)=O ZVKRVGZVXQYLPZ-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- SOXUFMZTHZXOGC-UHFFFAOYSA-N [Li].[Mn].[Co].[Ni] Chemical compound [Li].[Mn].[Co].[Ni] SOXUFMZTHZXOGC-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 239000006257 cathode slurry Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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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- Battery Electrode And Active Subsutance (AREA)
Abstract
The present invention discloses a method for manufacturing a positive pole piece of the lithium ion battery, and the method comprises coating the positive material adhesive on the collector after mixing, and at the same time substituting the single adhesive in the conventional method with two or more than two adhesives with different magnitude of molecular weight. The method of the invention effectively increases the binding adhesive force of the positive pole piece after coating, further the processing capabilities of coating surface density of the pole piece, compacted density and flexibility can be further increased, and effectively realize the advancing of the battery capability and the optimizing of the capability.
Description
Technical field
The present invention relates to technical field of lithium batteries, particularly relate to a kind of anode slice of lithium ion battery manufacture method that can improve anode material for lithium-ion batteries adhesive force.
Background technology
In the production preparation of lithium ion battery, the manufacture method of anode pole piece normally will be coated on the collector after the mixing homogenate such as positive electrode, binding agent and conductive agent, solvent.The positive electrode of anode material for lithium-ion batteries, particularly granule, bigger serface, low tap density and the bond effect of collector are relatively poor.Common solution is the consumption that increases binding agent.But the raising of binding agent content in anode sizing agent has reduced the processing characteristics of anode pole piece conversely, has increased the control difficulty that battery is made, and has reduced activity substance content, influences the capacity of battery.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, provide a kind of bond effect that can optimize anode material for lithium-ion batteries and collector, effectively improve the adhesive force of the anode pole piece after the coating and compacted density, effectively improve the anode slice of lithium ion battery manufacture method of battery capacity simultaneously.
To achieve these goals, the present invention has adopted following technical scheme:
The invention discloses a kind of manufacture method of anode slice of lithium ion battery, described method comprise with positive electrode with coat on the collector after binding agent mixes, especially, use the binding agent of two or more different molecular weight size simultaneously.
Preferably, use low-molecular-weight binding agent and HMW binding agent simultaneously, described low-molecular-weight binding agent is meant the binding agent of molecular weight 10,000～400,000, and described HMW binding agent is meant that molecular weight is not less than 400,000 binding agent.
The quality of described low-molecular-weight binding agent is no more than 50% of the total consumption of binding agent than consumption, preferably accounts for 20～30% of the total consumption of binding agent, more preferably accounts for 20% of the total consumption of binding agent.
In the preferred embodiment of the present invention, described binding agent is selected from: at least a in polyethylene, polypropylene, polyvinylidene chloride, polytetrafluoroethylene, polyvinylidene fluoride, polyformaldehyde, polyethylene glycol oxide, gelatin, polyacrylic acid, polyisobutene, polyesters or the polyamide-based macromolecule polymer material.
In the preferred embodiment of the present invention, described positive electrode is selected from: at least a in cobalt acid lithium, LiMn2O4, lithium nickel cobalt dioxide series binary material, nickel cobalt manganese series ternary material, series of phosphate positive electrode (as LiFePO4, phosphoric acid vanadium lithium etc.), lithium titanate or the lithium vanadate.
Owing to adopted above technical scheme, the beneficial effect that the present invention is possessed is:
The present invention is by the single binding agent in the binding agent replacement conventional method of two or more different molecular weight size of coupling use when anodal homogenate, adhesive force, the adhesion strength of the anode pole piece after the coating have effectively been improved, improve the pliability of pole piece, make that pole piece is not easy to crack, dry linting, and effectively improve compacted density, thereby can effectively improve the capacity and the cycle performance of battery.
Embodiment
At present the binding agent that uses mostly is chain structure, and the size of molecular weight has directly reflected the length of chain, and the compatibility by the functional group on the chain and fluorine and solvent or split material surface plays cementation.The bond effect of the molecular weight of binding agent and distribution appreciable impact binding agent.Low-molecular-weight binding agent degree of crystallinity height can reduce bulk viscosity, help mobile and wetting, thereby improve interfacial adhesion power, but molecular weight is when low, the binding agent cohesive strength is relatively poor, easy generation cohesional failure when peeling off.HMW binding agent cohesive strength is bigger, helps improving adhesion strength, but the binding agent degree of crystallinity of bigger molecular weight is not high, can cause viscosity to increase, and blocks wetting and dispersion.Therefore, for obtaining bond effect preferably, must seek suitable molecular weight distribution.
The manufacture method of anode slice of lithium ion battery of the present invention uses the binding agent of two or more different molecular weight size to replace single binding agent in the conventional method when positive electrode homogenate.Particularly adopt the low-molecular-weight binding agent and the HMW binding agent of molecular weight more than 400,000 of molecular weight 10,000～400,000 to mate use simultaneously.The HMW binding agent provides the Polymer Physics gel network, improves " frame strength "; Low-molecular-weight is little less because of flowing, and steric hindrance is less, can be interspersed between the nano particle, guarantees the disperse uniformity.Preferably, low-molecular-weight binding agent consumption is no more than 50% (mass ratio) of total binding agent consumption.
Under the prerequisite that the binding agent coupling that satisfies above-mentioned different molecular weight distribution is used, the used binding agent of the present invention can polyethylene, in polypropylene, polyvinylidene chloride, polytetrafluoroethylene, polyvinylidene fluoride, polyformaldehyde, polyethylene glycol oxide, gelatin, polyacrylic acid, polyisobutene, polyesters or the polyamide-based macromolecule polymer material any two or more, also can be any one the combination of different molecular weight wherein simultaneously.
The preparation method of anode slice of lithium ion battery of the present invention, be applicable to the positive electrode that this area is commonly used, such as, can select at least a in cobalt acid lithium, LiMn2O4, lithium nickel cobalt dioxide series binary material, nickel cobalt manganese series ternary material, series of phosphate positive electrode (as LiFePO4, phosphoric acid vanadium lithium etc.), lithium titanate or the lithium vanadate for use.
Among the preparation method of anode slice of lithium ion battery of the present invention, the joining day of binding agent in the homogenate process, can select with two or more different molecular weight binding agent simultaneously or at random substep join in the solvent dissolving glue earlier, also can directly above-mentioned binding agent be joined simultaneously earlier and carry out the siccative mixing in positive active material and the conductive agent powder, again solvent be added homogenate in the dry powder.
The present invention is by using the binding agent of two or more different molecular weight size in the homogenate process of anode sizing agent, can effectively improve the anode pole piece bonding adhesive force after the coating, and then can improve processing characteristicies such as pole piece coated face density, compacted density, pliability, make that pole piece is not easy to crack, dry linting, effectively realize the lifting and the optimization in Properties of battery capacity.
Below by specific embodiment the present invention is done further detailed description.
Embodiment 1
When carrying out the homogenate of iron phosphate lithium positive pole slurry, choose molecular weight and be respectively two kinds of Kynoar of 350,000 and 700,000 as binding agent, abbreviate binding agent A and B respectively as, NMP is a solvent.The service quality ratio of the Kynoar binding agent of two kinds of different molecular weights was respectively 10: 0, and 7: 3,5: 5,3: 7,2: 8,1: 9 and 0: 10, two kinds of binding agents added in the solvent behind the stirring and dissolving glue with powder mixing homogenate simultaneously and are coated on and prepare anode pole piece on the collector.The adhesion strength and the maximum compacted density of test aforementioned proportion gained pole piece are as shown in table 1.
As seen when low-molecular-weight binding agent A when mass ratio is no more than 50% in the binding agent total amount bond effect and the processability of pole piece better, particularly the mass ratio of low-molecular-weight binding agent A and HMW binding agent B is 2: 8 o'clock, the bond effect of pole piece and processability the best, and the pliability of pole piece is obviously improved during than unimodal molecular weight.
Table 1 adds two kinds of different molecular weight poly (vinylidene fluoride) binding agents simultaneously
Test result during glue homogenate
| A∶B | Adhesion strength (MPa) | Maximum compacted density (mg/cm 3) |
| 10∶0 | 1.82 | 2.01 |
| 7∶3 | 3.12 | 2.03 |
| 5∶5 | 3.60 | 2.06 |
| 3∶7 | 3.75 | 2.11 |
| 2∶8 | 3.88 | 2.15 |
| 1∶9 | 3.62 | 2.08 |
| 0∶10 | 3.15 | 2.03 |
Embodiment 2
Two kinds of binding agents among the embodiment 1 are added simultaneously, change into the binding agent B of HMW add earlier stir 15min after, add low-molecular-weight binding agent B again, mix and stir glue.All the other steps are with embodiment 1.Adhesion strength that records and compacted density result are as shown in table 2.The result shows, with the binding agent of different molecular weight simultaneously or substep join and dissolve glue in the solvent, little to the bond effect and the processability influence of pole piece.
Table 2 adds two kinds of different molecular weight poly (vinylidene fluoride) binding agents at times
Test result during glue homogenate
| A∶B | Adhesion strength (MPa) | Maximum compacted density (mg/cm 3) |
| 10∶0 | 1.82 | 2.01 |
| 7∶3 | 3.18 | 2.03 |
| 5∶5 | 3.66 | 2.07 |
| 3∶7 | 3.81 | 2.12 |
| 2∶8 | 3.92 | 2.17 |
| 1∶9 | 3.69 | 2.09 |
| 0∶10 | 3.15 | 2.03 |
Embodiment 3
When carrying out the homogenate of lithium cobaltate cathode slurry, choose polyethylene glycol oxide as binding agent, water is as solvent, blank assay is got the polyethylene glycol oxide of 400,000 unimodal molecular weights, the contrast experiment get molecular weight be respectively 100,000 and 400,000 and mass ratio be two kinds of polyethylene glycol oxides of 3: 7, and blank assay equates with the total amount of used binding agent among the contrast experiment.Binding agent added in the solvent behind the stirring and dissolving glue with powder mixing homogenate such as positive electrode, conductive agents and be coated on prepare anode pole piece on the collector.
The adhesion strength of pole piece and cycle performance test are as shown in table 3.
The polyethylene glycol oxide experimental result contrast of table 3 molecular weight and two kinds of molecular weight
| Experimental project | Adhesion strength (MPa) | 300 circulation volume conservation rates (%) |
| Blank assay | 5.25 | 82.35％ |
| The contrast experiment | 6.43 | 85.27％ |
Embodiment 4
When carrying out the homogenate of lithium nickel cobalt manganese tertiary cathode material slurry, choose polytetrafluoroethylene as binding agent, water is as solvent, blank assay is got the polytetrafluoroethylene of 1,100,000 unimodal molecular weights, the contrast experiment get molecular weight be respectively 400,000 and 1,100,000 and mass ratio be two kinds of polytetrafluoroethylene of 2: 8, and blank assay equates with the total amount of used binding agent among the contrast experiment.Powders such as binding agent and positive electrode, conductive agent are carried out dry powder blend, again solvent is added to mix homogenate in the dry powder and be coated on and prepare anode pole piece on the collector.
The adhesion strength of pole piece and cycle performance test are as shown in table 4.
The polytetrafluoroethylene experiment result contrast of table 4 molecular weight and two kinds of molecular weight
| Experimental project | Adhesion strength (MPa) | 300 circulation volume conservation rates (%) |
| Blank assay | 4.65 | 88.45％ |
| The contrast experiment | 5.73 | 91.62％ |
Embodiment 5
When carrying out the homogenate of iron phosphate lithium positive pole slurry, choose molecular weight and be respectively 350,000,500,000,750,000 and mass ratio be three kinds of Kynoar of 2: 3: 5 as binding agent, NMP is a solvent.Blank assay is chosen the Kynoar of 750,000 unimodal molecular weights and is made binding agent.Blank assay equates with the total amount of used binding agent among the contrast experiment.Binding agent added in the solvent behind the stirring and dissolving glue with powder mixing homogenate such as positive electrode, conductive agents and be coated on prepare anode pole piece on the collector.
When using the binding agent of 750,000 unimodal molecular weights, coated face density meets or exceeds 350g/m
3The time, pole piece is cut edge and folding line district dry linting, and bond effect is relatively poor; And the binding agent that uses three kinds of different molecular weights mates when using, and surface density is 380g/m
3, 400g/m
3, 430g/m
3, 450g/m
3The time, bond effect is all good.Concrete test data is as shown in table 5.
The Kynoar experimental result contrast of table 5 molecular weight and three kinds of molecular weight
| Experimental project | Surface density (g/m 3) | Adhesion strength (MPa) | Whether fall material |
| Blank assay | 350 | 3.05 | Slightly fall material |
| 380 | 2.50 | Obviously fall material | |
| The contrast experiment | 380 | 3.12 | Not |
| 400 | 3.60 | Not | |
| 430 | 3.75 | Not | |
| 450 | 3.88 | Not |
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (7)
1. the manufacture method of an anode slice of lithium ion battery, described method comprise with positive electrode with coat on the collector after binding agent mixes, it is characterized in that: the binding agent that uses two or more different molecular weight size simultaneously.
2, the manufacture method of a kind of anode slice of lithium ion battery according to claim 1, it is characterized in that: use low-molecular-weight binding agent and HMW binding agent simultaneously, described low-molecular-weight binding agent is meant the binding agent of molecular weight 10,000～400,000, and described HMW binding agent is meant that molecular weight is not less than 400,000 binding agent.
3, the manufacture method of a kind of anode slice of lithium ion battery according to claim 2 is characterized in that: the quality of described low-molecular-weight binding agent is no more than 50% of the total consumption of binding agent than consumption.
4, the manufacture method of a kind of anode slice of lithium ion battery according to claim 3 is characterized in that: the quality of described low-molecular-weight binding agent accounts for 20～30% of the total consumption of binding agent than consumption.
5, the manufacture method of a kind of anode slice of lithium ion battery according to claim 4 is characterized in that: the quality of described low-molecular-weight binding agent accounts for 20% of the total consumption of binding agent than consumption.
6, according to any described a kind of method of making anode slice of lithium ion battery of claim 1～5, it is characterized in that: described binding agent is selected from: at least a in polyethylene, polypropylene, polyvinylidene chloride, polytetrafluoroethylene, polyvinylidene fluoride, polyformaldehyde, polyethylene glycol oxide, gelatin, polyacrylic acid, polyisobutene, polyesters or the polyamide-based macromolecule polymer material.
7, according to any described a kind of method of making anode slice of lithium ion battery of claim 1～5, it is characterized in that: described positive electrode is selected from: at least a in cobalt acid lithium, LiMn2O4, lithium nickel cobalt dioxide series binary material, nickel cobalt manganese series ternary material, series of phosphate positive electrode, lithium titanate or the lithium vanadate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810066074XA CN101241988A (en) | 2008-02-03 | 2008-02-03 | A making method for anode slice of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810066074XA CN101241988A (en) | 2008-02-03 | 2008-02-03 | A making method for anode slice of lithium ion battery |
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| CN101241988A true CN101241988A (en) | 2008-08-13 |
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| CNA200810066074XA Pending CN101241988A (en) | 2008-02-03 | 2008-02-03 | A making method for anode slice of lithium ion battery |
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Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101685862A (en) * | 2008-09-26 | 2010-03-31 | 深圳市比克电池有限公司 | Lithium ion battery positive electrode slurry, preparation method thereof and prepared pole piece and battery |
| CN102074732A (en) * | 2010-12-25 | 2011-05-25 | 东莞市良源电池科技有限公司 | Lithium ion battery provided with high molecular weight adhesive |
| CN102306754A (en) * | 2011-09-23 | 2012-01-04 | 江苏乐能电池股份有限公司 | Lithium ion battery manufacturing method capable of preventing positive pole piece from falling off |
| CN102569789A (en) * | 2010-12-29 | 2012-07-11 | 清华大学 | Anode composite material, preparation method thereof and lithium ion battery |
| CN102593424A (en) * | 2012-03-05 | 2012-07-18 | 中南大学 | Method for preparing anode of lithium ion battery |
| CN102782786A (en) * | 2010-02-25 | 2012-11-14 | 康宁股份有限公司 | Carbon electrode batch material and method of making a carbon electrode material |
| CN103022475A (en) * | 2012-12-10 | 2013-04-03 | 彩虹集团电子股份有限公司 | Preparation method for lithium cobalt oxide with high pole piece compaction density |
| CN104247095A (en) * | 2012-05-14 | 2014-12-24 | 日东电工株式会社 | Electricity storage device, positive electrode and porous sheet used in electricity storage device, and method for improving dope rate |
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| WO2024045553A1 (en) * | 2022-08-30 | 2024-03-07 | 宁德时代新能源科技股份有限公司 | Binder, preparation method, positive electrode sheet, secondary battery and electric device |
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2008
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