Title:
LAYERED OXIDE POSITIVE ELECTRODE MATERIAL AND PREPARATION METHOD THEREFOR, AND SODIUM-ION BATTERY
Document Type and Number:
WIPO Patent Application WO/2024/031913
Kind Code:
A1
Abstract:
The present application provides a layered oxide positive electrode material and a preparation method therefor, and a sodium-ion battery. The layered oxide positive electrode material comprises a core and a shell covering the surface of the core. The core comprises NaxMnaM1-aO2, and the shell comprises NaxNibMncFedO2, wherein 0.7＜x≤0.9, 0.8≤a＜1, 0.2≤b＜0.5, 0.2≤c＜0.6, 0.2≤d≤0.5, and M comprises any one or a combination of at least two of Ni, Ti, Fe and Cu. In the present application, the synergistic effect of the core and the shell prevents dissolution of Mn, and reduces a side reaction of the material and an electrolyte in a reaction process, so that the discharge capacity and cycle performance of the layered oxide positive electrode material is improved.
Inventors:
XU KAIHUA (CN)
LAI YANQING (CN)
YANG XING (CN)
ZHANG KUN (CN)
LI CONG (CN)
HUA WENCHAO (CN)
FAN LIANGJIAO (CN)
XUE XIAOFEI (CN)
LAI YANQING (CN)
YANG XING (CN)
ZHANG KUN (CN)
LI CONG (CN)
HUA WENCHAO (CN)
FAN LIANGJIAO (CN)
XUE XIAOFEI (CN)
Application Number:
PCT/CN2022/140550
Publication Date:
February 15, 2024
Filing Date:
December 21, 2022
Export Citation:
Assignee:
GEM CO LTD (CN)
International Classes:
H01M4/36; H01M4/525
Domestic Patent References:
| WO2022126253A1 | 2022-06-23 |
Foreign References:
| CN115148978A | 2022-10-04 | |||
| CN109449418A | 2019-03-08 | |||
| CN110277540A | 2019-09-24 | |||
| CN111082058A | 2020-04-28 | |||
| US20150333325A1 | 2015-11-19 |
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (CN)
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