Modified silicon-carbon negative electrode material, preparation method therefor, and application thereof
AssigneeHengdian Group Dmegc Magnetics Co., Ltd
InventorsHailiang Ren, Guoguang Wang, Yiyao Han, Yang Xia, Jun Xu
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Abstract
A modified silicon-carbon negative electrode material, a preparation method therefor, and an application thereof are disclosed. A method includes mixing a silicon-carbon negative electrode material with a lithium alkoxide solution to carry out a solvothermal reaction. The solid powder obtained after the solvothermal reaction is alcohol washed. The powder is dried to obtain the modified silicon-carbon negative electrode material. The lithium alkoxide solution is formed by mixing metallic lithium with an alcohol solvent.
Claims11
A preparation method of a modified silicon-carbon negative electrode material, comprising the following steps:
- (1) mixing metal lithium with an alcohol solvent to obtain a lithium alkoxide solution, mixing a silicon-carbon negative electrode material with the lithium alkoxide solution, and performing a solvothermal reaction;
- wherein the alcohol solvent is a fluorine-containing alcohol;
- wherein the fluorine-containing alcohol is selected from the group consisting of any one or a combination of at least two of 2-fluoroethanol, 2,2-difluoroethanol, trifluoroacetaldehyde ethyl hemiacetal, 2,2,2-trifluoroethanol, 3,3,3-trifluoropropan-1-ol, 2,2,3,3,3-pentafluoro-1-propanol, hexafluoroisopropanol, hexafluorobutanol, perfluorobutanol, hexafluoro-2,3-bis(trifluoromethyl)-2,3-butanediol, 1H,1H,2H,2H-perfluoro-1-octanol or 1H,1H,7H-dodecafluoro-1-heptanol;
- and
- (2) alcohol washing solid powder obtained from the solvothermal reaction in step (1), and drying to obtain the modified silicon-carbon negative electrode material.
Dependencies are inferred from the claim text.