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Title:
MULTIFUNCTIONALIZED MODIFIED POLYMER BINDER FOR LITHIUM ION BATTERY AND USE THEREOF IN ELECTROCHEMICAL ENERGY STORAGE DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/000579
Kind Code:
A1
Abstract:
A multifunctionalized modified polymer binder for a lithium ion battery. The binder is modifiedly prepared by means of a free radical graft copolymerization reaction or a Michael addition reaction by using a biomass polymer or a synthetic polymer as a substrate and using a hydrophilic monomer and an oleophilic monomer as functionalized modified monomers. The binder has a three-dimensional space network with a multi-branch structure, so that more active sites will come into contact with an electrode active material, and the uniformity and smoothness during the film formation of an electrode slurry can be improved; and the peeling strength of the active material and a conductive agent on a metal substrate is reinforced. The binder has excellent elasticity and binding force, can be applied to water/organic solvent, or to the positive electrode and negative electrodes of a lithium ion battery, and can promote the conduction of electrons/ions in the charging-discharging process, so that the electrochemical interface impedance of a pole piece is lowered, the performance at high rates, and the cycling stability of the positive electrode material and the negative electrode material of the lithium battery are greatly improved. In addition, the binder has a wide range of raw material sources for synthesis, can significantly reduce costs, and has broad market prospects.

Inventors:
ZHANG, Lingzhi (No.2, Nengyuan Road Wushan, Tianhe Distric, Guangzhou Guangdong 0, 510640, CN)
HE, Jiarong (No.2, Nengyuan Road Wushan, Tianhe Distric, Guangzhou Guangdong 0, 510640, CN)
WANG, Jinglun (No.2, Nengyuan Road Wushan, Tianhe Distric, Guangzhou Guangdong 0, 510640, CN)
SU, Jing (No.2, Nengyuan Road Wushan, Tianhe Distric, Guangzhou Guangdong 0, 510640, CN)
Application Number:
CN2016/098379
Publication Date:
January 04, 2018
Filing Date:
September 08, 2016
Export Citation:
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Assignee:
GUANGZHOU INSTITUTE OF ENERGY CONVERSION, CHINESE ACADEMY OF SCIENCES (No.2, Nengyuan Road Wushan, Tianhe Distric, Guangzhou Guangdong 0, 510640, CN)
International Classes:
C09J151/00; C08F251/02; C09J105/16; C09J151/02
Foreign References:
CN105504169A2016-04-20
US3882057A1975-05-06
CN103788905A2014-05-14
US4322472A1982-03-30
CN102031078A2011-04-27
CN105914377A2016-08-31
CN105131875A2015-12-09
Attorney, Agent or Firm:
GUANGZHOU KEYUE I.P. LAW OFFICE (Room 616, 6/F Building 23-1, No.100, Xianlie Central Road, Yuexiu Distric, Guangzhou Guangdong 0, 510070, CN)
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