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1. (WO2018036309) POSITIVE ELECTRODE ADDITIVE AND PREPARATION METHOD THEREFOR, POSITIVE ELECTRODE PLATE AND SECONDARY LITHIUM ION BATTERY

Pub. No.:    WO/2018/036309    International Application No.:    PCT/CN2017/093546
Publication Date: Fri Mar 02 00:59:59 CET 2018 International Filing Date: Thu Jul 20 01:59:59 CEST 2017
IPC: H01M 4/62
H01M 4/131
H01M 4/136
H01M 10/0525
Applicants: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
宁德时代新能源科技股份有限公司
Inventors: HONG, Xiang
洪响
JIANG, Lingyan
姜玲燕
Title: POSITIVE ELECTRODE ADDITIVE AND PREPARATION METHOD THEREFOR, POSITIVE ELECTRODE PLATE AND SECONDARY LITHIUM ION BATTERY
Abstract:
Provided are a positive electrode additive and a preparation method therefor, a positive electrode plate and a secondary lithium ion battery. The positive electrode additive comprises a modified lithium carbonate. The modified lithium carbonate comprises lithium carbonate particles and a polymer coating layer. The coating layer coats the surface of the lithium carbonate particles and comprises a polymer. The positive electrode additive of the present invention is low in cost and has a simple preparation method. When the positive electrode additive is added to a positive electrode plate and applied to a secondary lithium ion battery, the safety performance of the secondary lithium ion battery can be significantly improved on the basis that the electrical performance of the secondary lithium ion battery is not influenced.