Title:
POSITIVE ELECTRODE AQUEOUS BINDER FOR LITHIUM-ION BATTERY, AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/160845
Kind Code:
A1
Abstract:
A positive electrode aqueous binder for a lithium-ion battery, and a preparation method therefor, characterized in that the binder is formed by the copolymerization of an ethylenically unsaturated monomer and a flexible aqueous emulsion, wherein the ethylenically unsaturated monomer contains an ethylenically unsaturated carboxylic acid or an ethylenically unsaturated carboxylic anhydride, an ethylenically unsaturated nitrile-based monomer, and an ethylenically unsaturated hydrophilic monomer, which does not contain a nitrile group and a carboxyl; and the flexible aqueous emulsion contains water and flexible polymer latex particles. A positive electrode slurry prepared from the binder has good viscosity stability; a positive electrode plate prepared therefrom has a high peel strength and good flexibility under high-compaction density; and the lithium-ion battery prepared therefrom has a high cycle capacity retention rate, i.e., high cycle performance.
Inventors:
WANG WEIHUA (CN)
LIU JUN (CN)
YUE MIN (CN)
LIU JUN (CN)
YUE MIN (CN)
Application Number:
PCT/CN2021/129087
Publication Date:
August 04, 2022
Filing Date:
November 05, 2021
Export Citation:
Assignee:
SHENZHEN YANYI NEW MAT CO LTD (CN)
International Classes:
C08F259/08; C08F255/00; C08F261/00; C08F271/00; C08F289/00; H01M4/62; H01M10/0525
Domestic Patent References:
| WO2011078212A1 | 2011-06-30 |
Foreign References:
| CN101457131A | 2009-06-17 | |||
| CN104981927A | 2015-10-14 | |||
| CN111253534A | 2020-06-09 | |||
| CN101880512A | 2010-11-10 | |||
| CN101740747A | 2010-06-16 | |||
| CN106784850A | 2017-05-31 | |||
| CN107078254A | 2017-08-18 | |||
| CN107384261A | 2017-11-24 | |||
| US6287723B1 | 2001-09-11 |
Attorney, Agent or Firm:
GEXU INTELLECTUAL PROPERTY LAW FIRM (CN)
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