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Title:
METHOD FOR PREPARING CROSS-LINKED AQUEOUS BINDER FOR LITHIUM ION BATTERY IN COMBINATION WITH COATING AND DRYING PROCESS
Document Type and Number:
WIPO Patent Application WO/2019/061675
Kind Code:
A1
Abstract:
A method for preparing a cross-linked aqueous binder for a lithium ion battery. The method uses an aqueous polymer containing an organic carboxylic acid or an amino group or a hydroxyl group and a water-soluble small molecule crosslinking agent containing a hydroxyl group, an amino group, or a carboxyl group as raw materials of the aqueous binder. The raw materials are cross-linked by an esterification and an amidation reaction under conditions for coating and drying of electrode plates of lithium ion batteries. The preparation process is simple, does not change existing processing conditions for lithium ion battery production, produces electrodes with good cohesiveness, flexibility, and elasticity, resolves the issues of the prior art in which there is low bonding strength between an electrode active material, a conductive agent, and a current collector, as well as insufficient elasticity to alleviate loosening and detachment due to expansion and contraction during charging and discharging of the lithium ion batteries.

Inventors:
ZHANG, Lingzhi (No. 2, Nengyuan Road Wushan, Tianhe Distric, Guangzhou Guangdong 0, 510640, CN)
ZHONG, Haoxiang (No. 2, Nengyuan Road Wushan, Tianhe Distric, Guangzhou Guangdong 0, 510640, CN)
LIU, Shuling (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)
HUANG, Jinxin (No. 2, Nengyuan Road Wushan, Tianhe Distric, Guangzhou Guangdong 0, 510640, CN)
Application Number:
CN2017/109004
Publication Date:
April 04, 2019
Filing Date:
November 01, 2017
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:
C09J151/02; C08F8/14; C08F251/00; C08F261/04; C08G73/02; C09J129/04; C09J151/00; H01M4/131; H01M4/62
Foreign References:
CN105914377A2016-08-31
CN105504169A2016-04-20
CN105470522A2016-04-06
US3882057A1975-05-06
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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