Title:
CRYSTAL MATERIAL, PREPARATION METHOD AND USE THEREOF, POSITIVE ELECTRODE MATERIAL FOR SODIUM ION BATTERY, SODIUM ION BATTERY, AND APPARATUS
Document Type and Number:
WIPO Patent Application WO/2020/124468
Kind Code:
A1
Abstract:
The present application discloses a crystal material, a preparation method and a use thereof, a positive electrode material for a sodium ion battery, a sodium ion battery, and an apparatus, relating to the technical field of sodium ion batteries. The crystal material is represented by a chemical formula of Na2M(C2O4)X·nH2O, where M is at least one positive divalent metal, X is a negative divalent anionic group, and X is not (C2O4), 0≤n≤12. The crystal material belongs to a hexagonal crystal system and has a three-dimensional skeleton structure. Sodium ions and water molecules do not participate in the construction of the skeleton. The crystal material has an excellent charge-discharge specific capacity and a high redox potential, and can significantly improve the structural stability of a positive electrode active material. This application resolves the defects of a complex preparation process, high costs, and unsatisfactory stability of existing positive electrode material for sodium ion batteries. The positive electrode material for a sodium ion battery provided by the present application has the advantages of high sodium insertion performance, high redox potential, excellent cycle stability, and low costs.
Inventors:
TANG YONGBING (CN)
YAO WENJIAO (CN)
SONG TIANYI (CN)
WU NANZHONG (CN)
YAO WENJIAO (CN)
SONG TIANYI (CN)
WU NANZHONG (CN)
Application Number:
PCT/CN2018/122244
Publication Date:
June 25, 2020
Filing Date:
December 20, 2018
Export Citation:
Assignee:
SHENZHEN INST ADV TECH (CN)
International Classes:
H01M4/58; H01M10/054
Foreign References:
| CN105789617A | 2016-07-20 | |||
| CN102132444A | 2011-07-20 | |||
| US20150333325A1 | 2015-11-19 |
Attorney, Agent or Firm:
SHENZHEN KEJIN INTELLECTUAL PROPERTY OFFICE (CN)
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