NEGATIVE POLE PIECE, SECONDARY BATTERY AND APPARATUS THEREOF

WIPO Patent Application WO/2020/177623

A1

Provided in the present application are a negative pole piece, a secondary battery and an apparatus thereof. The negative pole piece comprises a negative current collector and a negative membrane disposed on the negative current collector; the negative membrane comprises a first coating and a second coating; the first coating is disposed on the negative current collector and comprises a first negative active material and a first conductive agent; the second coating is disposed on the surface of the first coating away from the negative current collector and comprises a second negative active material and a second conductive agent. The first negative active material and the second negative active material are carbon materials having different graphitization degrees, and the graphitization degree of the first negative active material is greater than the graphitization degree of the second negative active material. The mass percentage content of the first conductive agent in the first coating is less than the mass percentage content of the second conductive agent in the second coating. The negative pole piece of the present application can enable the secondary battery to have high specific energy and excellent dynamic performance.

LIANG CHENGDU (CN)
ZENG YUQUN (CN)
YAN CHUANMIAO (CN)
LIU JINHUA (CN)

PCT/CN2020/077137

September 10, 2020

February 28, 2020

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CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)

H01M4/583; H01M4/133; H01M4/62; H01M10/0525; H01M10/054

CN103633293A	2014-03-12
CN107871852A	2018-04-03
CN108140810A	2018-06-08
CN101159324A	2008-04-09
JP2003077463A	2003-03-14

BEIJING WUZHOUYANGHE & PARTNERS (CN)

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