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The invention belongs to the technical field of lithium ion batteries, and particularly relates to a preparation method of a lithium vanadium manganese phosphate positive electrode material. The preparation method comprises the following steps: firstly, preparing a vanadium manganese phosphate precursor, wherein weighing initial raw materials including a manganese source compound, a vanadium source compound and a phosphorus source compound according to a molar ratio, mixing, pouring into a liquid-phase medium, and stirring on an automatic stirrer; adding ammonia water as a buffering agent into the stirred liquid, then adding sodium hydroxide to adjust the pH value, filtering out a precipitate after the precipitate appears in the liquid, repeatedly washing and drying, crushing, and dehydrating at high temperature to obtain a precursor; mixing the precursor subjected to high-temperature dehydration with a lithium source and a carbon source, and grinding and crushing; and sintering the dry powder material in an oxygen-free environment, and grinding to form a final product. The prepared lithium vanadium manganese phosphate is small in particle size, uniform in particle size distribution, easy to coat and dope and modify, excellent in performance, high in quality and stable in structure, and the material performance is better improved.lithium vanadium manganese phosphate positive electrode material.
本发明属于锂离子电池技术领域，具体涉及一种磷酸锰钒锂正极材料的制备方法。制备方法如下：首先制备磷酸锰钒前驱体；将初始原料锰源化合物、钒源化合物、磷源化合物按摩尔比称量并混合，然后倒入液相介质中在自动搅拌机上搅拌；在搅拌后的液体中加入氨水作为缓冲剂，再加入氢氧化钠调节pH值，溶液中出现沉淀后过滤出沉淀物，反复洗涤干燥后粉碎，高温脱水获得前驱体；将高温脱水后的前驱体混入锂源和碳源研磨粉碎；将干燥粉末材料在无氧环境烧结后进行研磨粉碎，形成最终产品。制备的磷酸锰钒锂粒径小，粒度分布均匀，易于包覆和掺杂改性，性能优良，并且质量高结构稳定，更好地改善材料性能。
The invention belongs to the technical field of lithium ion batteries, and particularly relates to a preparation method of a lithium vanadium manganese phosphate positive electrode material. The preparation method comprises the following steps: firstly, preparing a vanadium manganese phosphate precursor, wherein weighing initial raw materials including a manganese source compound, a vanadium source compound and a phosphorus source compound according to a molar ratio, mixing, pouring into a liquid-phase medium, and stirring on an automatic stirrer; adding ammonia water as a buffering agent into the stirred liquid, then adding sodium hydroxide to adjust the pH value, filtering out a precipitate after the precipitate appears in the liquid, repeatedly washing and drying, crushing, and dehydrating at high temperature to obtain a precursor; mixing the precursor subjected to high-temperature dehydration with a lithium source and a carbon source, and grinding and crushing; and sintering the dry powder material in an oxygen-free environment, and grinding to form a final product. The prepared lithium vanadium manganese phosphate is small in particle size, uniform in particle size distribution, easy to coat and dope and modify, excellent in performance, high in quality and stable in structure, and the material performance is better improved.lithium vanadium manganese phosphate positive electrode material.
本发明属于锂离子电池技术领域，具体涉及一种磷酸锰钒锂正极材料的制备方法。制备方法如下：首先制备磷酸锰钒前驱体；将初始原料锰源化合物、钒源化合物、磷源化合物按摩尔比称量并混合，然后倒入液相介质中在自动搅拌机上搅拌；在搅拌后的液体中加入氨水作为缓冲剂，再加入氢氧化钠调节pH值，溶液中出现沉淀后过滤出沉淀物，反复洗涤干燥后粉碎，高温脱水获得前驱体；将高温脱水后的前驱体混入锂源和碳源研磨粉碎；将干燥粉末材料在无氧环境烧结后进行研磨粉碎，形成最终产品。制备的磷酸锰钒锂粒径小，粒度分布均匀，易于包覆和掺杂改性，性能优良，并且质量高结构稳定，更好地改善材料性能。
Preparation method of lithium vanadium manganese phosphate positive electrode material
一种磷酸锰钒锂正极材料的制备方法
LI JIGANG (author)
2021-07-02
Patent
Electronic Resource
Chinese
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