Abstract: A kind of high-capacity lithium-rich manganese-based material is prepared through sol-gel method by using acetate as raw material,citric acid as chelating agent,and ammonia solution for pH adjustment.The effects of titrating speed,tabletting treatment and niobium-doped modification on the properties of lithium-rich manganese-based materials are investigated.Crystal structure and particle composition of the materials are characterized by X-ray diffraction,scanning electron microscopy and laser particle size analysis.A button cell is made from the materials to test the electrochemical properties.X-ray diffraction measurements indicate the materials have a complete crystal structure of lithium-rich manganese-based materials.The first discharge capacity of the materials that are made by tabletting and slowing titration speed is around 210 mA·h·g-1,while that of the niobium-doped modified materials is about 250 mA·h·g-1.The capacity of both tabletted and niobium-doped materials has some improvement under large current.By optimizing the synthesis conditions for lithium-rich manganese-based materials,it provides theoretical basis and process parameter support for mass production of materials.
陈垒, 樊俊豪, 马翠环, 崔海滨. 溶胶-凝胶法制备富锂锰基材料[J]. 现代化工, 2020, 40(4): 143-147.
CHEN Lei, FAN Jun-hao, MA Cui-huan, CUI Hai-bin. Preparation of lithium-rich manganese-based materials by sol-gel method. Modern Chemical Industry, 2020, 40(4): 143-147.
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