Title:
HARD CARBON COMPOSITE MATERIAL, PREPARATION METHOD THEREFOR, AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2023/024488
Kind Code:
A1
Abstract:
A hard carbon composite material, a preparation method therefor, and the use thereof. The hard carbon composite material has a core-shell structure, wherein the inner core comprises hard carbon doped with a nitrogen element, and the outer shell comprises a phosphorus-containing compound; and the mass of the inner core is 1-10% of the mass of the outer shell. The inner core of the hard carbon composite material is doped with the nitrogen element to improve the conductivity of the composite material; the outer shell is doped with the phosphorus-containing compound, and the specific capacity and first efficiency of the composite material are improved by means of the high specific capacity of the phosphorus element; moreover, the specific surface area of the porous structure of the inner core and the whole specific surface area of the hard carbon composite material are reduced by means of the coating of the phosphorus-containing compound of the outer shell. By means of matching the inner core and the outer shell, the resulting hard carbon composite material has excellent electrochemical properties.
Inventors:
ZHAO XIAOFENG (CN)
Application Number:
PCT/CN2022/080885
Publication Date:
March 02, 2023
Filing Date:
March 15, 2022
Export Citation:
Assignee:
SVOLT ENERGY TECH CO LTD (CN)
International Classes:
H01M4/36; C01B32/00; H01M4/587; H01M4/62; H01M10/0525
Foreign References:
| CN113707863A | 2021-11-26 | |||
| CN101887966A | 2010-11-17 | |||
| CN112838197A | 2021-05-25 | |||
| CN105098185A | 2015-11-25 | |||
| CN106505199A | 2017-03-15 | |||
| CN104752721A | 2015-07-01 | |||
| CN102820455A | 2012-12-12 |
Attorney, Agent or Firm:
CHOFN INTELLECTUAL PROPERTY (CN)
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