Title:
POSITIVE ELECTRODE MATERIAL AND PREPARATION METHOD THEREFOR, AND SODIUM-ION BATTERY
Document Type and Number:
WIPO Patent Application WO/2024/060761
Kind Code:
A1
Abstract:
A sodium-ion positive electrode material and a preparation method therefor, and a sodium-ion battery. The sodium-ion positive electrode material has a chemical general formula of Nax(NiaFebMcMn1-a-b-c)O2, and comprises a spheroid formed by agglomerating a plurality of flaky particles having uniform sizes. The flaky particles have a length of 0.5-2 μm and a thickness of 50-200 nm; the range of the particle size distribution concentration degree α is: 0.65≤α≤1.25, wherein α=(Dv90-Dv10)/Dv50; and the range of the sphericity regularity β is: 1≤β≤1.1, wherein β is the average value of a ratio of the major axis to the minor axis of the spheroid having a particle size of Dv50. The sodium-ion positive electrode material is narrow in particle size distribution and regular in shape, and has the advantages of low specific surface area, high tap density, good processing performance and the like.
Inventors:
CHEN LONG (CN)
LIU XIANGHUAN (CN)
LUO YIQI (CN)
LI ZIKUN (CN)
HUANG YOUYUAN (CN)
LIU XIANGHUAN (CN)
LUO YIQI (CN)
LI ZIKUN (CN)
HUANG YOUYUAN (CN)
Application Number:
PCT/CN2023/103626
Publication Date:
March 28, 2024
Filing Date:
June 29, 2023
Export Citation:
Assignee:
SHENZHEN BTR NEW ENERGY TECH RESEARCH INSTITUTE CO LTD (CN)
International Classes:
H01M10/054; C01G53/00; H01M4/36; H01M4/505; H01M4/525
Domestic Patent References:
| WO2016143171A1 | 2016-09-15 |
Foreign References:
| CN115498154A | 2022-12-20 | |||
| KR20140064681A | 2014-05-28 | |||
| CN114835173A | 2022-08-02 | |||
| CN114956211A | 2022-08-30 | |||
| CN112670497A | 2021-04-16 | |||
| CN112838206A | 2021-05-25 | |||
| JP2021068672A | 2021-04-30 |
Attorney, Agent or Firm:
UNI-INTEL PATENT AND TRADEMARK LAW FIRM (CN)
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