Title:
SODIUM ION BATTERY NEGATIVE ELECTRODE MATERIAL AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/021642
Kind Code:
A1
Abstract:
A sodium ion battery negative electrode material and a preparation method therefor, comprising: firstly dissolving a sulfur source, a tin source and a carbon source in water, to obtain a mixed solution; then using a foam material to adsorb the mixed solution, and performing freeze-drying, to obtain a precursor; then transferring the precursor into a microwave reactor, and performing microwave irradiation under inert conditions, to obtain an intermediate product; and finally uniformly mixing the intermediate product with a selenium powder, and performing high temperature treatment under the protection of an inert gas, to obtain a sodium ion battery negative electrode material. Selenium doping and desulfurization enhances the activity of the battery negative electrode material, and a certain reserved space is provided for sodium ion de-intercalation in a battery negative electrode, thereby preventing volume expansion and powdering of the battery negative electrode material caused by sodium ion de-intercalation, and improving the electrochemical performance and cycle performance of the sodium ion battery negative electrode material.
Inventors:
YANG YONGJUN (CN)
PENG FEI (CN)
PENG FEI (CN)
Application Number:
PCT/CN2020/124576
Publication Date:
February 03, 2022
Filing Date:
October 29, 2020
Export Citation:
Assignee:
GUANGDONG KAIJIN NEW ENERGY TECH CORP LTD (CN)
International Classes:
C01B32/05; C01G19/00; H01M4/58; H01M4/62; H01M10/054
Foreign References:
| CN111924873A | 2020-11-13 | |||
| CN106784814A | 2017-05-31 | |||
| CN106848250A | 2017-06-13 | |||
| CN109742361A | 2019-05-10 | |||
| CN110148723A | 2019-08-20 | |||
| US20160294000A1 | 2016-10-06 |
Attorney, Agent or Firm:
DONGGUAN QIXIN ZHANHUA INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) (CN)
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