一种多孔钠离子电池焦磷酸磷酸铁钠正极材料的制备方法
By constructing a porous NFPP cathode material using a two-step etching method, the problems of low porosity and poor conductivity of traditional NFPP materials are solved, achieving efficient ion diffusion and improved electrochemical performance, making it suitable for sodium-ion batteries.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUBEI XINGFA CHEM GRP CO LTD
- Filing Date
- 2025-06-03
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional sodium iron phosphate pyrophosphate (NFPP) cathode materials suffer from low porosity, poor conductivity, and poor ion diffusion, resulting in insufficient electrochemical performance.
A two-step etching method was adopted. First, the carbon layer was initially opened and the SiO2 template surface was activated by the IPA-HF system. Then, deep etching was carried out in the HF solution containing sodium citrate to construct a through and uniform porous structure. Free carbon was removed by centrifugal cleaning.
It significantly improves the specific surface area and ion diffusion performance of NFPP cathode materials, enhances electrochemical performance and cycle stability, and increases the compaction density and mechanical strength of the materials.
Smart Images
Figure CN120622438B_ABST