Title:
LITHIUM SUPPLEMENTING LAYER AND NEGATIVE POLE PIECE THEREOF, LITHIUM-ION BATTERY AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/207368
Kind Code:
A1
Abstract:
The present application relates to the technical field of lithium-ion batteries, and in particular to a lithium supplementing layer and a negative pole piece thereof, a lithium-ion battery, and a device. The lithium supplementing layer is formed by connecting a transition layer, an oxide layer, and a surface layer in sequence. The surface layer contains an appropriate amount of organic material and filler, so that the winding temperature of the negative pole piece can be reduced. The oxide layer material in the lithium supplementing layer is used for providing an additional lithium source, such that after liquid injection, the lithium source can be continuously supplemented during the cycle process, and the activity of the lithium layer can be increased. In addition, the filler contained in the surface layer can effectively restrain the expansion of the active material so as to improve the cycle performance of the battery.
Inventors:
CHEN SHITONG (CN)
XIE BIN (CN)
GONG ZHIJIE (CN)
HU ZHAO (CN)
MA LIN (CN)
XIE BIN (CN)
GONG ZHIJIE (CN)
HU ZHAO (CN)
MA LIN (CN)
Application Number:
PCT/CN2020/083448
Publication Date:
October 15, 2020
Filing Date:
April 07, 2020
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H01M4/13; H01M10/42; H01M10/0525
Foreign References:
| CN108878775A | 2018-11-23 | |||
| CN109103419A | 2018-12-28 | |||
| CN103401016A | 2013-11-20 | |||
| CN109244355A | 2019-01-18 | |||
| US20170158903A1 | 2017-06-08 | |||
| CN201910287520A | 2019-04-11 |
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