Iron-phase-rich phosphoric acid ferric sodium pyrophosphate material, preparation method and application thereof, and sodium ion battery
Iron-rich sodium pyrophosphate ion materials were prepared by a specific method, and Na4Fe3.09(PO4)2P2O7 material was prepared. This solved the problem of slow Na+ insertion/extraction rate in sodium-ion batteries and improved the battery's discharge specific capacity, redox kinetics performance and cycle performance.
CN120943233APending Publication Date: 2025-11-14HEFEI UNIV +1
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Patent Information
- Application Number
- CN202511132513.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-13
- Publication Date
- 2025-11-14
AI Technical Summary
Technical Problem
The slow Na+ insertion/extraction rate in sodium-ion batteries affects electrochemical performance, and it is necessary to improve their discharge specific capacity, redox kinetics, and cycle performance.
Method used
A method for preparing iron-rich sodium pyrophosphate material was adopted. By mixing phosphorus source, iron source, sodium source and carbon source, calcining and rolling were performed to prepare Na4Fe3.09(PO4)2P2O7 material as positive electrode active material for sodium-ion batteries.
Benefits of technology
The preparation method improved the Na+ insertion and extraction rate, significantly enhancing the discharge specific capacity, redox kinetics, and cycle performance of sodium-ion batteries.
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Abstract
The invention discloses an iron-phase-rich ferric sodium pyrophosphate material, a preparation method and application thereof and a sodium ion battery, and relates to the technical field of sodium ion batteries, the preparation method of the iron-phase-rich ferric sodium pyrophosphate material comprises the following steps: (1) mixing a phosphorus source, an iron source, a sodium source and a carbon source to obtain a precursor; and (2) calcining the precursor to obtain the iron-rich sodium ferric pyrophosphate material. According to the invention, the obtained iron-phase-rich phosphoric acid ferric sodium pyrophosphate material is used as a positive electrode active material to be applied to the sodium ion battery, so that the sodium ion battery has excellent specific discharge capacity, oxidation-reduction kinetic performance, cycle performance and the like.
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