Polyanionic precursor, sodium ion battery positive electrode material and preparation method therefor, sodium ion battery, and electrical device

By using a polyanionic precursor with the chemical formula Mm+nM’wPxOy·zH2O, the sodium ion battery positive electrode material was prepared, which solved the problems of low capacity of the existing material and pores during the production process, and achieved high capacity, excellent electrochemical performance and environmentally friendly processes.

WO2025056062A1PCT designated stage expired Publication Date: 2025-03-20CNGR ADVANCED MATERIAL CO LTD
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Patent Information

Application Number
PCT/CN2024/119129
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-09-15
Filing Date
2024-09-14
Publication Date
2025-03-20

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Abstract

The present application relates to the field of sodium ion batteries, and provides a polyanionic precursor, a sodium ion battery positive electrode material and a preparation method therefor, a sodium ion battery, and an electrical device. The polyanionic precursor contains a substance having a chemical general formula of Mm+nM'wPxOy·zH2O. The preparation method for the polyanionic precursor comprises: using a metal salt containing M and / or M' and a phosphorus source containing pyrophosphate as raw materials of the polyanionic precursor, dissolving the raw materials, mixing same to obtain a mixed solution, implementing a reaction, and carrying out solid-liquid separation to obtain the polyanionic precursor. The polyanionic precursor of the present application has a large specific surface area, and the prepared sodium ion battery positive electrode material has high purity and excellent electrochemical performance.
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