Title:
HARD CARBON COMPOSITE MATERIAL AND PREPARATION METHOD THEREFOR, AND LITHIUM ION BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/142395
Kind Code:
A1
Abstract:
The present application relates to the technical field of negative electrode materials for lithium ion batteries, and in particular to a hard carbon composite material and a preparation method therefor, and a lithium ion battery. The hard carbon composite material has a core-shell structure; the core of the core-shell structure comprises a phosphorus-doped hard carbon material; the shell of the core-shell structure comprises a lithium salt and amorphous carbon; a carbon nanotube is further grown on the surface of the phosphorus-doped hard carbon material; the hard carbon composite material is spherical. The hard carbon composite material has the advantages of high tap density, large specific surface area, high specific capacity, high first cycle efficiency, good rate capability, good cycle performance, and the like.
Inventors:
ZHAO XIAOFENG (CN)
LIU JING (CN)
YANG HONGXIN (CN)
LIU JING (CN)
YANG HONGXIN (CN)
Application Number:
PCT/CN2022/106510
Publication Date:
August 03, 2023
Filing Date:
July 19, 2022
Export Citation:
Assignee:
SVOLT ENERGY TECH CO LTD (CN)
International Classes:
C01B32/05; C01B32/16; H01M4/587; H01M10/0525
Foreign References:
| CN114436240A | 2022-05-06 | |||
| CN104600258A | 2015-05-06 | |||
| CN113889605A | 2022-01-04 | |||
| CN107959006A | 2018-04-24 | |||
| CN103474667A | 2013-12-25 | |||
| CN112952059A | 2021-06-11 | |||
| US20210050597A1 | 2021-02-18 |
Attorney, Agent or Firm:
CHOFN INTELLECTUAL PROPERTY (CN)
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