Doped iron hydrogen phosphate precursor as well as preparation method and application thereof
By introducing a metal dopant source into the ferric hydrogen phosphate precursor, a doped ferric hydrogen phosphate precursor was prepared, which solved the problem of low electronic conductivity of sodium iron phosphate pyrophosphate material and improved the electrochemical performance and cycle performance of sodium-ion batteries.
CN122035802APending Publication Date: 2026-05-15BYD CO LTD
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Patent Information
- Application Number
- CN202411630447.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2026-05-15
AI Technical Summary
Technical Problem
Sodium iron phosphate pyrophosphate has low electronic conductivity, which affects the rate performance, specific capacity, and cycle performance of sodium-ion batteries.
Method used
By introducing a metal dopant source into the ferric hydrogen phosphate precursor, a doped ferric hydrogen phosphate precursor is prepared, which improves the uniformity of the distribution of metal dopant ions in the material and enhances the electronic conductivity and sodium ion diffusion rate.
Benefits of technology
The electronic conductivity and sodium ion diffusion rate of sodium iron phosphate pyrophosphate were improved, thus enhancing the electrochemical performance of the material and improving the high-rate performance and cycle stability of sodium-ion batteries.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention discloses a doped iron hydrogen phosphate precursor and a preparation method and application thereof.The preparation method of the doped iron hydrogen phosphate precursor comprises the steps that a solution containing a phosphorus source and a solution containing an oxidizing agent are added into a solution containing an iron source and a metal doping source respectively, a reaction is conducted, and a reaction solution is obtained; and adjusting the reaction liquid to be acidic, aging, and carrying out solid-liquid separation to obtain the doped iron hydrogen phosphate precursor. According to the preparation method, the metal doping source is added into the reaction liquid for preparing the iron hydrogen phosphate precursor to prepare the doped iron hydrogen phosphate precursor, so that the distribution uniformity of metal doping ions in the iron hydrogen phosphate precursor is effectively improved, and the problem of relatively poor ion uniformity of the iron hydrogen phosphate precursor prepared by a solid-phase reaction method is effectively solved; the intrinsic electron conductivity of the material and the diffusion rate of sodium ions are further improved, so that the electrochemical performance of the material is favorably improved.
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