CN103956455B - A kind of lithium electricity positive and negative electrode slurry low viscosity processing method - Google Patents
A kind of lithium electricity positive and negative electrode slurry low viscosity processing method Download PDFInfo
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- CN103956455B CN103956455B CN201410189917.0A CN201410189917A CN103956455B CN 103956455 B CN103956455 B CN 103956455B CN 201410189917 A CN201410189917 A CN 201410189917A CN 103956455 B CN103956455 B CN 103956455B
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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
- H01M4/04—Processes of manufacture in general
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
- H01M4/622—Binders being polymers
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- 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
- H01M4/624—Electric conductive fillers
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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
- 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
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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 kind of lithium electricity positive and negative electrode slurry low viscosity processing method, comprise anode sizing agent processing method and cathode size processing method; Anode sizing agent processing method is: get quantitative different two kinds of oil binders, conductive agent and 1-METHYLPYRROLIDONE NMP and carry out vacuum stirring 2 to 6h, draw cathode mix; The stirring of 3 to 5h will be carried out in cathode mix and the low anode sizing agent of viscosity; The processing method of cathode size is: get quantitative two kinds of different aqueous binders, deionized water carries out vacuum stirring 2 to 6h, draw negative electrode mix; The stirring of 3 to 5h will be carried out in negative electrode mix and the low cathode size of viscosity.The invention solves positive and negative slurry low viscosity problem and cause the difficult problem that pole piece surface density is unstable and scrap, fill up the technical barrier of this problem of lithium electrical travelling industry process, from now on, positive and negative slurry low viscosity problem causes pole piece surface density situation that is unstable and that scrap not existed, and retrieves great economic loss will to thousands of Li electricity enterprise.
Description
Technical field
The present invention relates to lithium electric material production technical field, particularly a kind of lithium electricity positive and negative electrode slurry low viscosity processing method.
Background technology
As everyone knows, when the viscosity of the anode and cathode slurry preparing battery core causes for various reasons lower than 1000MPa.s, very large impact can be caused on the surface density of pole piece, but also the performance of the battery that it is made can be affected, if viscosity is at 500MPa.s, anode and cathode slurry will be scrapped.And positive and negative pole material is expensive, once scrap, cause damage to enterprise and be difficult to estimate.
In current lithium electrical travelling industry, the low viscous technical scheme of the anode and cathode slurry for battery core is:
The slurry low to both positive and negative polarity viscosity, viscosity, between 900-1200MPa.s, is direct discharging coating.Drawback is: both positive and negative polarity surface density is unstable, and slurry viscosity is poor, finally causes battery performance poor.
The slurry low to both positive and negative polarity viscosity, viscosity between 100-500MPa.s, current lithium electrical travelling industry without any process handle, last slurry is all scrapped it.
But at present in lithium electrical travelling industry, still effectively do not process the low viscous technical scheme of anode and cathode slurry of battery core.
Summary of the invention
The technical problem to be solved in the present invention is for above-mentioned the deficiencies in the prior art, and providing a kind of can scrap avoiding after low viscous anode and cathode slurry process and bad lithium electricity positive and negative electrode slurry low viscosity processing method effectively.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of lithium electricity positive and negative electrode slurry low viscosity processing method, comprises anode sizing agent processing method and cathode size processing method;
The processing method of described anode sizing agent is:
1) get quantitative different two kinds of oil binders, conductive agent and solvent N-methyl pyrilidone NMP and carry out vacuum stirring 2 to 6h, draw cathode mix;
2) stirring of 3 to 5h will be carried out in cathode mix and the low anode sizing agent of viscosity;
The processing method of described cathode size is:
1) get quantitative two kinds of different aqueous binders, deionized water carries out vacuum stirring 2 to 6h, draw negative electrode mix;
2) stirring of 3 to 5h will be carried out in negative electrode mix and the low cathode size of viscosity.
In technique scheme, in described two kinds of different oil binders, have at least one to be Kynoar PVDF, in described two kinds of different aqueous binders, have at least one to be sodium carboxymethylcellulose CMC.
In technique scheme, another kind of described oil binder is polythene PE, and another kind of described aqueous binder is PVAC polyvinylalcohol.
In technique scheme, described Kynoar PVDF accounts for 2.0 to 2.8% of the total dry powder of anode sizing agent, oil binder described in another accounts for 1.0% to 1.5% of the total dry powder of anode sizing agent, described conductive agent accounts for 1.8% to 2.5% of the total dry powder of anode sizing agent, and described 1-METHYLPYRROLIDONE NMP accounts for 6% to 10% of the total dry powder of anode sizing agent.
In technique scheme, described sodium carboxymethylcellulose CMC accounts for 1.0% to 3.1% of the total dry powder of cathode size, and another kind of described aqueous binder accounts for 0.8% to 2.5% of the total dry powder of cathode size, and described deionized water accounts for 6.1% to 12.6% of the total dry powder of cathode size.
In technique scheme, described conductive agent is conductive carbon black S-P.
In technique scheme, in the processing method of described anode sizing agent, the time of vacuum stirring is 4h, is 4h by the time of carrying out stirring in cathode mix and the low anode sizing agent of viscosity.
In technique scheme, in the processing method of described cathode size, the time of vacuum stirring is 4h, is 4h by the time of carrying out stirring in negative electrode mix and the low cathode size of viscosity.
In technique scheme, described stirring is all carried out in vacuum stirring bucket.
In technique scheme, in the processing method of described anode sizing agent: described low viscous anode sizing agent is added in the described vacuum stirring bucket at cathode mix place and stir; In the processing method of described cathode size: described low viscous cathode size is added in the described vacuum stirring bucket at negative electrode mix place and stir.
The invention has the beneficial effects as follows: several different bonding agent is dissolved in corresponding solvent, then anode and cathode slurry is stirred according to special stirring flow process, the anode and cathode slurry low viscosity processing method invention of preparation battery core solves this difficult problem just, fill up the technical barrier of this problem of lithium electrical travelling industry process, from now on, positive and negative slurry low viscosity problem causes the situation that pole piece surface density is unstable and scrap, and will not exist, and retrieves great economic loss will to thousands of Li electricity enterprise.
Accompanying drawing explanation
Fig. 1 is low viscosity anode sizing agent process chart of the present invention;
Fig. 2 is low viscosity cathode size process chart of the present invention;
Fig. 3 is the low viscosity anode sizing agent discharge capacity of the cell ratio before treatment of the embodiment of the present invention and the schematic diagram of cycle-index;
Fig. 4 be discharge capacity of the cell after the low viscosity anode sizing agent process of the embodiment of the present invention than and the schematic diagram of cycle-index.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further detailed explanation.
As shown in Figure 1, 2, a kind of lithium electricity positive and negative electrode slurry low viscosity processing method, comprises anode sizing agent processing method and cathode size processing method;
Described anode sizing agent processing method is:
1) get quantitative different two kinds of oil binders, conductive agent and 1-METHYLPYRROLIDONE NMP and carry out vacuum stirring 2 to 6h, draw cathode mix;
2) stirring of 3 to 5h will be carried out in cathode mix and the low anode sizing agent of viscosity;
The processing method of described cathode size is:
1) get quantitative two kinds of different aqueous binders, deionized water carries out vacuum stirring 2 to 6h, draw negative electrode mix;
2) stirring of 3 to 5h will be carried out in negative electrode mix and the low cathode size of viscosity.
Preferably, in described two kinds of different oil binders, have at least one to be Kynoar PVDF, in described two kinds of different aqueous binders, have at least one to be sodium carboxymethylcellulose CMC.Another kind of described oil binder is polythene PE, and another kind of described aqueous binder is PVAC polyvinylalcohol.
Preferably, described Kynoar PVDF accounts for 2.0 to 2.8% of the total dry powder of anode sizing agent, oil binder described in another accounts for 1.0% to 1.5% of the total dry powder of anode sizing agent, described conductive agent accounts for 1.8% to 2.5% of the total dry powder of anode sizing agent, and described 1-METHYLPYRROLIDONE NMP accounts for 6% to 10% of the total dry powder of anode sizing agent.
Preferably, described sodium carboxymethylcellulose CMC accounts for 1.0% to 3.1% of the total dry powder of cathode size, and another kind of described aqueous binder accounts for 0.8% to 2.5% of the total dry powder of cathode size, and described deionized water accounts for 6.1% to 12.6% of the total dry powder of cathode size.
Preferably, described conductive agent is conductive carbon black S-P.
Preferably, in the processing method of described anode sizing agent, the time of vacuum stirring is 4h, is 4h by the time of carrying out stirring in cathode mix and the low anode sizing agent of viscosity.
Preferably, in the processing method of described cathode size, the time of vacuum stirring is 4h, is 4h by the time of carrying out stirring in negative electrode mix and the low cathode size of viscosity.
Preferably, described stirring is all carried out in vacuum stirring bucket.
Preferably, in the processing method of described anode sizing agent: described low viscous anode sizing agent is added in the described vacuum stirring bucket at cathode mix place and stir.
Preferably, in the processing method of described cathode size: described low viscous cathode size is added in the described vacuum stirring bucket at negative electrode mix place and stir.
Embodiment: select 433450AAR type design 800mAh.
As shown in table 1 and Fig. 3, before carrying out process of the present invention, when wherein anode sizing agent is 1200MPa.s, during coating, surface density is unstable, and after being made into battery, capacity is on the low side, and loop attenuation is fast.
Table 1.
As shown in table 2 and Fig. 4, after carrying out process of the present invention, positive pole viscosity becomes 5631MPa.s, and during discharging coating, pole piece surface density is stablized.After pole piece is made into battery, battery capacity is brought into normal play, and circulation is good.
| Model | Lot number | Nominal capacity (mAh) | Discharge-rate (C) | Discharge capacity (mAh) |
| 433450AR | GY10-1 | 800 | 0.5C | 853 |
| 433450AR | GY10-1 | 800 | 0.5C | 867 |
Table 2.
Above embodiment is merely illustrative and not limiting to the invention, therefore all equivalences done according to the method described in patent claim of the present invention change or modify, and are included in patent claim of the present invention.
Claims (8)
1. a lithium electricity positive and negative electrode slurry low viscosity processing method, is characterized in that: comprise anode sizing agent processing method and cathode size processing method;
The processing method of described anode sizing agent is:
1) get quantitative different two kinds of oil binders, conductive agent and 1-METHYLPYRROLIDONE NMP and carry out vacuum stirring 2 to 6h, draw cathode mix;
2) stirring of 3 to 5h will be carried out in cathode mix and the low anode sizing agent of viscosity;
The processing method of described cathode size is:
1) get quantitative two kinds of different aqueous binders, deionized water carries out vacuum stirring 2 to 6h, draw negative electrode mix;
2) stirring of 3 to 5h will be carried out in negative electrode mix and the low cathode size of viscosity;
Described two kinds of different oil binder one are Kynoar PVDF, and another kind is PE, and in described two kinds of different aqueous binders, one is sodium carboxymethylcellulose CMC; Another kind is PVAC polyvinylalcohol; The viscosity of the anode sizing agent that described viscosity is low and the low cathode size of viscosity is <500MPa.s.
2. a kind of lithium electricity positive and negative electrode slurry low viscosity processing method according to claim 1, it is characterized in that: described Kynoar PVDF accounts for 2.0 to 2.8% of the total dry powder of anode sizing agent, oil binder described in another accounts for 1.0% to 1.5% of the total dry powder of anode sizing agent, described conductive agent accounts for 1.8% to 2.5% of the total dry powder of anode sizing agent, and described 1-METHYLPYRROLIDONE NMP accounts for 6% to 10% of the total dry powder of anode sizing agent.
3. a kind of lithium electricity positive and negative electrode slurry low viscosity processing method according to claim 1, it is characterized in that: described sodium carboxymethylcellulose CMC accounts for 1.0% to 3.1% of the total dry powder of cathode size, another kind of described aqueous binder accounts for 0.8% to 2.5% of the total dry powder of cathode size, and described deionized water accounts for 6.1% to 12.6% of the total dry powder of cathode size.
4. a kind of lithium electricity positive and negative electrode slurry low viscosity processing method according to claim 1, is characterized in that: described conductive agent is conductive carbon black S-P.
5. a kind of lithium electricity positive and negative electrode slurry low viscosity processing method according to claim 1, it is characterized in that: in the processing method of described anode sizing agent, the time of vacuum stirring is 4h, is 4h by the time of carrying out stirring in cathode mix and the low anode sizing agent of viscosity.
6. a kind of lithium electricity positive and negative electrode slurry low viscosity processing method according to claim 1, it is characterized in that: in the processing method of described cathode size, the time of vacuum stirring is 4h, is 4h by the time of carrying out stirring in negative electrode mix and the low cathode size of viscosity.
7. a kind of lithium electricity positive and negative electrode slurry low viscosity processing method according to claim 1, is characterized in that: described stirring is all carried out in vacuum stirring bucket.
8. a kind of lithium electricity positive and negative electrode slurry low viscosity processing method according to claim 7, is characterized in that: in the processing method of described anode sizing agent: added by described low viscous anode sizing agent in the described vacuum stirring bucket at cathode mix place and stir; In the processing method of described cathode size: described low viscous cathode size is added in the described vacuum stirring bucket at negative electrode mix place and stir.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000348713A (en) * | 1999-06-03 | 2000-12-15 | Matsushita Electric Ind Co Ltd | Manufacture of positive electrode mix for battery and positive electrode plate for battery using positive electrode mix |
| CN1684289A (en) * | 2004-06-07 | 2005-10-19 | 松下电器产业株式会社 | Electrode plate for non-water series secondary cell and method for producing said electrode plate |
| CN103107338A (en) * | 2011-10-06 | 2013-05-15 | 丰田自动车株式会社 | Method for manufacturing lithium secondary battery |
| CN103155233A (en) * | 2010-10-05 | 2013-06-12 | 丰田自动车株式会社 | Method of producing battery |
| CN103208631A (en) * | 2012-01-17 | 2013-07-17 | 万向电动汽车有限公司 | Lithium battery positive electrode slurry and preparation method thereof |
| JP2013164905A (en) * | 2012-02-09 | 2013-08-22 | Toyota Motor Corp | Method for manufacturing negative electrode plate |
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2014
- 2014-05-07 CN CN201410189917.0A patent/CN103956455B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000348713A (en) * | 1999-06-03 | 2000-12-15 | Matsushita Electric Ind Co Ltd | Manufacture of positive electrode mix for battery and positive electrode plate for battery using positive electrode mix |
| CN1684289A (en) * | 2004-06-07 | 2005-10-19 | 松下电器产业株式会社 | Electrode plate for non-water series secondary cell and method for producing said electrode plate |
| CN103155233A (en) * | 2010-10-05 | 2013-06-12 | 丰田自动车株式会社 | Method of producing battery |
| CN103107338A (en) * | 2011-10-06 | 2013-05-15 | 丰田自动车株式会社 | Method for manufacturing lithium secondary battery |
| CN103208631A (en) * | 2012-01-17 | 2013-07-17 | 万向电动汽车有限公司 | Lithium battery positive electrode slurry and preparation method thereof |
| JP2013164905A (en) * | 2012-02-09 | 2013-08-22 | Toyota Motor Corp | Method for manufacturing negative electrode plate |
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