Title:
NEGATIVE ELECTRODE PLATE, SECONDARY BATTERY AND DEVICE HAVING SAME
Document Type and Number:
WIPO Patent Application WO/2020/177624
Kind Code:
A1
Abstract:
Provided are a negative electrode plate, a secondary battery and a device having the same. The negative electrode plate comprises a negative electrode current collector and a negative electrode film provided at the negative electrode current collector. The negative electrode film comprises a first coating and a second coating. The first coating is the outermost layer of the negative electrode film and comprises a first negative electrode active material. The first negative electrode active material comprises a silicon-based material and a carbon material. In the first coating, a percentage by mass of the silicon-based material is from 0.5% to 10%. The second coating is provided between the first coating and the negative electrode current collector, and comprises a second negative electrode active material. The second negative electrode active material comprises a silicon-based material and a carbon material. In the second coating, a percentage by mass of the silicon-based material is from 5% to 50%. The secondary battery of the present invention has high specific energy, high initial charging and discharging efficiency and good cycling performance, and is very safe.
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Inventors:
ZENG YUQUN (CN)
LIANG CHENGDU (CN)
YAN CHUANMIAO (CN)
LIU JINHUA (CN)
LIANG CHENGDU (CN)
YAN CHUANMIAO (CN)
LIU JINHUA (CN)
Application Number:
PCT/CN2020/077138
Publication Date:
September 10, 2020
Filing Date:
February 28, 2020
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H01M4/66; H01M4/48; H01M4/583
Foreign References:
| CN105849954A | 2016-08-10 | |||
| CN106030864A | 2016-10-12 | |||
| CN107785535A | 2018-03-09 | |||
| CN101969114A | 2011-02-09 | |||
| CN103201882A | 2013-07-10 | |||
| KR20190019854A | 2019-02-27 | |||
| JP2018181539A | 2018-11-15 |
Other References:
See also references of EP 3916860A4
Attorney, Agent or Firm:
BEIJING WUZHOUYANGHE & PARTNERS (CN)
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