Positive electrode material and preparation method therefor, positive electrode sheet, and secondary battery
By forming a porous network carbon layer on the surface of sodium vanadium fluorophosphate particles, the problems of low electronic conductivity and slow ion diffusion of sodium vanadium fluorophosphate in the cathode material are solved, thereby improving the charge and discharge efficiency and structural stability of the secondary battery.
WO2026137505A1PCT designated stage Publication Date: 2026-07-02HUBEI WANRUN NEW ENERGY TECH CO LTD
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- HUBEI WANRUN NEW ENERGY TECH CO LTD
- Filing Date
- 2024-12-31
- Publication Date
- 2026-07-02
Smart Images
Figure CN2024144234_02072026_PF_FP_ABST
Abstract
The present application belongs to the technical field of battery positive electrode materials, and provides a positive electrode material and a preparation method therefor, a positive electrode sheet, a secondary battery, and an electric device. The positive electrode material comprises a carbon layer and sodium vanadium fluorophosphate particles distributed in the carbon layer, wherein the carbon layer covers the sodium vanadium fluorophosphate particles. The carbon layer presents a porous network, and the thickness of the carbon layer is selected from 3-6 nm. The porosity of the positive electrode material is 10-35%. In the preparation method, a microwave-assisted hydrothermal treatment and sol-gel technology are used to obtain a gel slurry. The gel slurry is dried and then calcined to obtain the positive electrode material. The positive electrode material of the present application improves the wettability of an electrolyte and the transport efficiencies of electrons and sodium ions, and improves the charging and discharging efficiency and electrochemical performance of a secondary battery.
Need to check novelty before this filing date? Find Prior Art