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Binder and secondary battery

A binder and structural unit technology, applied in secondary batteries, battery electrodes, circuits, etc., can solve problems such as deterioration of battery performance, drying and cracking of pole pieces, corrosion of copper foil, etc., to simplify the feeding process without deteriorating battery performance. , The effect of improving coating yield and excellent rate

Inactive Publication Date: 2018-12-11
CONTEMPORARY AMPEREX TECH CO
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Problems solved by technology

But it will also have adverse effects on the battery due to the residue of plasticizers. For example, N-methylpyrrolidone residues will corrode copper foil; some will enter the electrolyte during battery use, participate in side reactions, and deteriorate battery performance.
[0005] In view of this, in order to achieve the problem of improving the drying and cracking of pole pieces during rapid coating without adding plasticizers, this application is proposed

Method used

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  • Binder and secondary battery
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preparation example Construction

[0066] The preparation method of the application binding agent is:

[0067] The raw materials for preparing the adhesive of this application are: butadiene shown in formula A, ethylene substituted by aromatic groups shown in formula B, ethylene substituted by ester groups or acyloxy groups shown in formula C, ethylene shown in formula D The polar group substituted ethylene:

[0068]

[0069] Among them, R 11 , R 12 , R 13 , R 14 , R 21 , R 22 , R 31 , R 32 , R 41 , R 42 The meaning expressed is the same as above.

[0070] The method for preparing the adhesive of the present application is:

[0071] Add the raw materials shown in formula A, formula B, formula C and formula D to the reactor in proportion, add initiator and molecular weight regulator, use water as solvent, and react at 60-80°C for 4-8 hours, when The number average molecular weight is 12×10 4 ~15×10 4 When the reaction is finished, the polymer of the present application is obtained.

[0072] The...

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Abstract

The present invention relates to the field of secondary battery materials, particularly to a binder and a secondary battery using the binder, wherein the binder is a polymer containing a poly conjugated diene structure unit, an aromatic group substituted polyalkenyl structure unit, an ester group or acyloxy substituted polyalkenyl structure unit and a polar group-substituted polyalkenyl structureunit, and the polar group is at least one selected from a hydroxyl group, a carboxyl group, a sulfonic acid group and an amide group. According to the present invention, by combining the four structure units, the electrode sheet using the binder cannot produce the dry cracking phenomenon during the rapid coating, such that the technical problem that the electrode sheet is subjected to dry crackingduring the rapid coating under the premise of no adding of the plasticizer can be avoided while the coating rate and the yield can be simultaneously improved, and the feeding process can be simplified, and the performance of the battery cannot be deteriorated.

Description

technical field [0001] The present application relates to the field of secondary battery materials, in particular, to a binder and a secondary battery using the binder. Background technique [0002] In recent years, the combustion of fossil fuels has caused serious air pollution in the central and eastern regions of my country with rapid economic development. Especially in the heating season, the "smog" weather has seriously affected people's production and life. Vehicle exhaust is a major source of urban air pollution. , its governance has received more and more attention. With the enhancement of people's awareness of environmental protection and the improvement of living standards, it is a trend to replace the original gasoline vehicles and diesel vehicles with new energy and environmental protection vehicles such as electric vehicles. [0003] As the heart of new energy vehicles, power batteries are a key link in the development of the entire industry chain of new energy v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M10/0525H01M10/054
CPCH01M4/622H01M10/0525H01M10/054Y02E60/10
Inventor 刘会会吴嘉龙汪康李吉蓉郭超
Owner CONTEMPORARY AMPEREX TECH CO
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