Title:
POSITIVE POLE PIECE, AND ELECTROCHEMICAL DEVICE AND EQUIPMENT RELATED THERETO
Document Type and Number:
WIPO Patent Application WO/2021/023134
Kind Code:
A1
Abstract:
The present application provides a positive pole piece, and an electrochemical device and equipment related thereto. The positive pole piece comprises: a positive electrode current collector, a positive electrode active material layer provided on at least one surface of the positive electrode current collector, and a safety layer provided between the positive electrode active material layer and the positive electrode current collector. The safety layer comprises a bonding substance, a conductive substance, and a special sensitive substance. Each molecule of the special sensitive substance comprises a monosaccharide structural unit, and a carbonate group and/or a phosphate group; moreover, at least a part of the carbonate group and/or the phosphate group is bonded to two or more monosaccharide structural units. The electrochemical device prepared using the positive pole piece of the present application has significantly improved safety and electrical performance (such as cycle performance).
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Inventors:
YU YANG (CN)
Application Number:
PCT/CN2020/106468
Publication Date:
February 11, 2021
Filing Date:
July 31, 2020
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H01M4/62; H01M10/42
Foreign References:
| CN110400933A | 2019-11-01 | |||
| CN110474114A | 2019-11-19 | |||
| CN110444764A | 2019-11-12 | |||
| CN110429240A | 2019-11-08 | |||
| CN110265665A | 2019-09-20 | |||
| CN104409681A | 2015-03-11 | |||
| CN106099043A | 2016-11-09 | |||
| JP2015216007A | 2015-12-03 | |||
| US20110236761A1 | 2011-09-29 | |||
| CN201910731186A | 2019-08-08 |
Other References:
See also references of EP 3979372A4
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