Title:
SECONDARY BATTERY, AND BATTERY MODULE, BATTERY PACK, AND ELECTRIC DEVICE COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2023/206357
Kind Code:
A1
Abstract:
The present application provides a secondary battery, and a battery module, a battery pack, and an electric device comprising same. The secondary battery comprises a positive electrode sheet and a non-aqueous electrolyte. The positive electrode sheet comprises a positive electrode active material having a core-shell structure; the positive electrode active material comprises an inner core and a shell coating the inner core; the chemical formula of the inner core is Li1+xMn1-
yAyP1-zRzO4; and the shell comprises a first coating layer coating the inner core, a second coating layer coating the first coating layer, and a third coating layer coating the second coating layer. The non-aqueous electrolyte comprises a first additive, wherein the first additive comprises one or more of compounds represented by formula (1), formula (2), and formula (3). According to the present application, the secondary battery can simultaneously have relatively high energy density, and good rate performance, cycle performance, storage performance, and safety performance.
Inventors:
CHEN PEIPEI (CN)
ZHANG LIMEI (CN)
JIANG YAO (CN)
LIU JIAO (CN)
ZHANG LIMEI (CN)
JIANG YAO (CN)
LIU JIAO (CN)
Application Number:
PCT/CN2022/090261
Publication Date:
November 02, 2023
Filing Date:
April 29, 2022
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H01M4/36
Foreign References:
| CN114256448A | 2022-03-29 | |||
| CN106058225A | 2016-10-26 | |||
| CN105261740A | 2016-01-20 | |||
| US20180166679A1 | 2018-06-14 | |||
| CN104600364A | 2015-05-06 | |||
| JP2021101432A | 2021-07-08 | |||
| CN110416525A | 2019-11-05 |
Attorney, Agent or Firm:
BEIJING EAST IP LTD. (CN)
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