CN103956455A - Lithium electric positive and negative pole sizing agent low viscosity processing method - Google Patents

Lithium electric positive and negative pole sizing agent low viscosity processing method Download PDF

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Publication number
CN103956455A
CN103956455A CN201410189917.0A CN201410189917A CN103956455A CN 103956455 A CN103956455 A CN 103956455A CN 201410189917 A CN201410189917 A CN 201410189917A CN 103956455 A CN103956455 A CN 103956455A
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China
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processing method
sizing agent
low viscosity
negative pole
positive
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CN201410189917.0A
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CN103956455B (en
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殷汝学
林鸿鹏
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DONGGUAN ADF BATTERY Co Ltd
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DONGGUAN ADF BATTERY Co Ltd
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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
    • 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
    • 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
    • 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
    • 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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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

The invention discloses a lithium electric positive and negative pole sizing agent low-viscosity processing method. The lithium electric positive and negative pole sizing agent low-viscosity processing method comprises a positive pole sizing agent processing method and a negative pole sizing agent processing method; the positive pole sizing agent processing method comprises the following steps of carrying out vacuum stirring on two different quantitative oil binding agents, a conductive agent and N-methyl pyrrolidone NMP for 2-6 hours so as to obtain a negative pole mixture, carrying out stirring a positive pole mixture in a positive pole sizing agent with low viscosity for 3-5 hours. The negative pole sizing agent processing method comprises the following steps of carrying out vacuum stirring on two different quantitative aqueous binders and deionized water for 2-6 hours so as to obtain a negative pole mixture; and stirring the negative mixture in the negative sizing agent with low viscosity for 3-5 hours. The lithium electric positive and negative pole sizing agent low viscosity processing method provided by the invention solves that the unstable density of a pole piece surface and the scrappage are caused by low viscosity of positive and negative pole sizing agents, the technical problem of lithium electric industry processing is filled, thus, the unstable density of a pole piece surface and the scrappage caused by low viscosity of the positive and negative pole sizing agents are not generated, and huge economic loss is retrieved for thousands of lithium electric enterprises.

Description

A kind of lithium electricity positive and negative electrode slurry low viscosity processing method
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 anode and cathode slurry of preparation battery core causes lower than 1000MPa.s for various reasons, can cause very large impact to the surface density of pole piece, but also can affect the performance of its battery of making, if viscosity is at 500MPa.s, anode and cathode slurry will be scrapped.And positive and negative pole material is expensive, once scrap, to enterprise, causes damage and be difficult to estimate.
At present in lithium electricity industry, for the low viscous technical scheme of anode and cathode slurry of battery core, be:
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, at present lithium electricity industry without any processing handle, last slurry is all to have scrapped it.
But in lithium electricity industry, still there is no effectively to process the low viscous technical scheme of anode and cathode slurry of battery core at present.
Summary of the invention
The technical problem to be solved in the present invention is for above-mentioned the deficiencies in the prior art, provides a kind of and can effectively by avoiding after low viscous anode and cathode slurry processing, scrap and bad lithium electricity positive and negative electrode slurry low viscosity processing method.
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 two kinds of different oil binders, conductive agent and solvent 1-METHYLPYRROLIDONE NMP and carry out vacuum stirring 2 to 6h, draw cathode mix;
2) will in cathode mix and the low anode sizing agent of viscosity, carry out 3 to 5h stirring;
The processing method of described cathode size is:
1) get quantitative different two kinds of aqueous binders, deionized water and carry out vacuum stirring 2 to 6h, draw negative pole mixture;
2) will in negative pole mixture and the low cathode size of viscosity, carry out 3 to 5h stirring.
In technique scheme, in described two kinds of different oil binders, having at least a kind of is Kynoar PVDF, and in described two kinds of different aqueous binders, having at least a kind of is 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, described in another, oil binder 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, by the time of stirring in cathode mix and the low anode sizing agent of viscosity, is 4h.
In technique scheme, in the processing method of described cathode size, the time of vacuum stirring is 4h, by the time of stirring in negative pole mixture and the low cathode size of viscosity, is 4h.
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 pole mixture place and stir.
The invention has the beneficial effects as follows: several different bonding agents are dissolved in to corresponding solvent, then according to special stirring flow process, stir anode and cathode slurry, the anode and cathode slurry low viscosity processing method invention of preparation battery core has solved this difficult problem just, fill up lithium electricity industry and processed the technical barrier of this problem, 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 huge 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 be discharge capacity of the cell before the low viscosity anode sizing agent of the embodiment of the present invention is processed than and the schematic diagram of cycle-index;
Fig. 4 be discharge capacity of the cell after the low viscosity anode sizing agent of the embodiment of the present invention is processed 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) will in cathode mix and the low anode sizing agent of viscosity, carry out 3 to 5h stirring;
The processing method of described cathode size is:
1) get quantitative different two kinds of aqueous binders, deionized water and carry out vacuum stirring 2 to 6h, draw negative pole mixture;
2) will in negative pole mixture and the low cathode size of viscosity, carry out 3 to 5h stirring.
Preferably, in described two kinds of different oil binders, having at least a kind of is Kynoar PVDF, and in described two kinds of different aqueous binders, having at least a kind of is 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, described in another, oil binder 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, by the time of stirring in cathode mix and the low anode sizing agent of viscosity, is 4h.
Preferably, in the processing method of described cathode size, the time of vacuum stirring is 4h, by the time of stirring in negative pole mixture and the low cathode size of viscosity, is 4h.
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 pole mixture place and stir.
Embodiment: select 433450AAR type design 800mAh.
As shown in table 1 and Fig. 3, before carrying out processing of the present invention, when wherein anode sizing agent is 1200MPa.s, during coating, surface density is unstable, is made into after battery, and capacity is on the low side, and loop attenuation is fast.
Table 1.
As shown in table 2 and Fig. 4, after carrying out processing of the present invention, anodal viscosity becomes 5631MPa.s, and during discharging coating, pole piece surface density is stable.Pole piece is made into after battery, and 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, and the equivalence of doing according to the method described in patent claim of the present invention therefore all changes or modifies, and is included in patent claim of the present invention.

Claims (10)

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) will in cathode mix and the low anode sizing agent of viscosity, carry out 3 to 5h stirring;
The processing method of described cathode size is:
1) get quantitative different two kinds of aqueous binders, deionized water and carry out vacuum stirring 2 to 6h, draw negative pole mixture;
2) will in negative pole mixture and the low cathode size of viscosity, carry out 3 to 5h stirring.
2. a kind of lithium electricity positive and negative electrode slurry low viscosity processing method according to claim 1, it is characterized in that: in described two kinds of different oil binders, having at least a kind of is Kynoar PVDF, in described two kinds of different aqueous binders, having at least a kind of is sodium carboxymethylcellulose CMC.
3. a kind of lithium electricity positive and negative electrode slurry low viscosity processing method according to claim 2, is characterized in that: another kind of described oil binder is polythene PE, and another kind of described aqueous binder is PVAC polyvinylalcohol.
4. a kind of lithium electricity positive and negative electrode slurry low viscosity processing method according to claim 2, it is characterized in that: described Kynoar PVDF accounts for 2.0 to 2.8% of the total dry powder of anode sizing agent, described in another, oil binder 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.
5. according to a kind of lithium electricity positive and negative electrode slurry low viscosity processing method described in claim 2 or 3, 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.
6. according to a kind of lithium electricity positive and negative electrode slurry low viscosity processing method described in claim 2 or 3, it is characterized in that: described conductive agent is conductive carbon black S-P.
7. 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, by the time of stirring in cathode mix and the low anode sizing agent of viscosity, is 4h.
8. 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, by the time of stirring in negative pole mixture and the low cathode size of viscosity, is 4h.
9. 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.
10. a kind of lithium electricity positive and negative electrode slurry low viscosity processing method according to claim 9, is characterized in that: 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 pole mixture place and stir.
CN201410189917.0A 2014-05-07 2014-05-07 A kind of lithium electricity positive and negative electrode slurry low viscosity processing method Active CN103956455B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
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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