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锂离子电池用LiMn0.58Fe0.42PO4前驱体Mn0.58Fe0.42CO3工艺研究
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Abstract:
本文针对磷酸锰铁锂(LMFP)正极材料碳酸锰铁前驱体制备，采用液相共沉淀法，通过调控金属液浓度，成功制备出锰铁元素高度均匀分布的碳酸锰铁前驱体，并继承到了该前驱体所制备的LMFP正极材料中、该LMFP材料压实密度达到2.3517 g/cm3，0.1C克容量为155.25 mAh/g，1C克容量为146.19 mAh/g，1C循环200周容量保持率为95.1%。
This paper focuses on the preparation of manganese iron carbonate precursor for lithium manganese iron phosphate (LMFP) cathode materials. Utilizing a liquid-phase co-precipitation method and regulating the concentration of the metal salt solution, a Mn0.58Fe0.42CO3 precursor with a highly uniform distribution of Mn and Fe elements was successfully synthesized. This elemental uniformity was effectively inherited by the resulting LiMn0.58Fe0.42PO4 cathode material. The as-prepared LMFP material exhibited a tap density of 2.3517 g/cm3, a specific discharge capacity of 155.25 mAh/g at 0.1C, and 146.19 mAh/g at 1C. Furthermore, it demonstrated excellent cycling stability, retaining 95.1% of its initial capacity after 200 cycles at a 1C rate.
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