Monocrystal-like small-particle sodium titanium manganese phosphate material based on spray cracking and preparation method thereof

CN120793875APending Publication Date: 2025-10-17CHAOWEI POWER GROUP CO LTD +1
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Patent Information

Application Number
CN202510890139.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-30
Publication Date
2025-10-17

AI Technical Summary

Technical Problem

Traditional preparation methods result in problems such as uneven particle size, structural defects, high cost and environmental pollution in sodium manganese titanium phosphate positive electrode materials, which limit their application in high-performance sodium-ion batteries.

Method used

By adopting the spray pyrolysis and two-stage sintering process, through precise control of the ingredient ratio, pH value and slurry properties, combined with air atmosphere spray pyrolysis and nitrogen atmosphere two-stage sintering, single-crystal small-particle sodium manganese titanium phosphate material is prepared, avoiding the defects of high-temperature solid-phase reaction method, sol-gel method and co-precipitation method.

Benefits of technology

The electrochemical properties of the material are improved, the energy density and cycle stability of the battery are enhanced, the production cost is reduced, and environmental pollution is reduced. The consistency and reliability of the material performance are improved.

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Abstract

The preparation method comprises the following steps: mixing soluble titanium salt, soluble manganese salt, a phosphorus source, an additive, a carbon source and a sodium source in proportion by adopting deionized water, and adjusting the pH value, the viscosity and the solid content to obtain slurry; carrying out spray cracking on the slurry to obtain a primary titanium manganese sodium phosphate material; and uniformly mixing the primary titanium manganese sodium phosphate material with sodium carbonate, and carrying out two-stage sintering to obtain the monocrystal-like small-particle titanium manganese sodium phosphate material. The problems that titanium and manganese are high in Mohs hardness and difficult to sand are solved through a spray cracking process, the high-performance monocrystal-like small-particle sodium titanium manganese phosphate material can be obtained while the production cost can be reduced, the energy density and the cycling stability of a battery can be improved as a positive electrode material, waste gas generated through spray cracking can be recycled, and the environment-friendly effect is achieved. And the material batch consistency and stability are high, and industrialization is facilitated.
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Citation Information

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