一种磷酸氢锰前驱体的制备方法及磷酸氢锰前驱体

By controlling pH and temperature, and reacting manganese ion complexing agents with phosphate solutions, a regular hexagonal prism-shaped manganese hydrogen phosphate precursor was prepared. This solved the purity and morphology problems in the preparation process of manganese hydrogen phosphate in the prior art, and achieved an efficient and simplified production process and excellent electrode material performance.

CN121134714BActive Publication Date: 2026-07-17HUNAN ESSOKAI FUTURE ENERGY RES INST CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUNAN ESSOKAI FUTURE ENERGY RES INST CO LTD
Filing Date
2025-10-11
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

The existing technology for preparing manganese hydrogen phosphate suffers from problems such as low product purity, small particle size, difficulty in precipitation and filtration, and uneven product morphology, resulting in poor consistency and low compaction capacity of lithium manganese iron phosphate cathode materials.

Method used

A reaction substrate was prepared using a manganese ion complexing agent, with the pH value controlled at 4.0–6.0 and the temperature at 33–38℃. A soluble manganese salt and phosphate solution were used for the reaction, followed by solid-liquid separation and drying to prepare a regular hexagonal prism-shaped manganese hydrogen phosphate precursor.

Benefits of technology

The production process was simplified, production efficiency was improved, raw material consumption was reduced, and high-purity, large-particle manganese hydrogen phosphate precursors were prepared, which improved the product morphology and enhanced the structural consistency and compaction capacity of the electrode materials.

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Abstract

本发明公开了一种磷酸氢锰前驱体的制备方法，包括如下步骤：1)将锰离子络合剂加水配置成反应底液，将反应底液加热至33～38℃备用；2)将可溶性锰盐、磷酸盐溶液和 / 或磷酸溶液加入反应底液中，然后加入质量浓度为5～15％的碱性溶液使体系pH值至4.0～6.0，反应温度维持33～38℃；3)将反应完成后的浆料进行固液分离，对得到的滤渣进行洗涤、干燥，即可。本发明所述的磷酸氢锰前驱体制备方法，制备工艺流程短，生产效率高，原料消耗低，其制备得到的磷酸氢锰前驱体产品颗粒为规则的正六棱柱型结构，对提高以磷酸氢锰为锰源制备的电极材料的一致性与压实容量具有重要意义。
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Citation Information

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