Title:
THREE-DIMENSIONAL SILICON-CARBON COMPOSITE MATERIAL AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/166007
Kind Code:
A1
Abstract:
The present invention relates to the field of battery negative electrode materials, in particular, to a three-dimensional silicon-carbon composite material. The composite material is a core-shell structure; the core is nano-silicon; the shell is a composite formed by a carbon nanotube, graphene, and amorphous carbon; the thickness ratio of the core to the shell is 100:(5-20). According to the three-dimensional silicon-carbon composite material and a preparation method therefor, by means of a chemical method, nano-silicon, a graphene oxide solution, and a hydroxylated carbon nanotube are formed into a three-dimensional network structure under the action of a chemical bond, and the composite material is doped with amorphous carbon formed after phenolic resin carbonization; thus, the electron conductivity and ionic conductivity of the composite material are improved, and the cycle performance thereof is improved.
Inventors:
GE CHUANCHANG (CN)
YANG YONGJUN (CN)
YANG YONGJUN (CN)
Application Number:
PCT/CN2021/090376
Publication Date:
August 11, 2022
Filing Date:
April 28, 2021
Export Citation:
Assignee:
GUANGDONG KAIJIN NEW ENERGY TECH CO LTD (CN)
International Classes:
H01M4/36; H01M4/62
Domestic Patent References:
| WO2009077049A1 | 2009-06-25 |
Foreign References:
| CN108063232A | 2018-05-22 | |||
| CN107204445A | 2017-09-26 | |||
| CN104701512A | 2015-06-10 | |||
| CN107565102A | 2018-01-09 | |||
| CN109524643A | 2019-03-26 | |||
| CN111816862A | 2020-10-23 |
Attorney, Agent or Firm:
DONGGUAN HENGCHENG IP AGENCY CO., LTD (CN)
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