以乙酸盐为原料、柠檬酸为螯合剂，氨水调节pH，采用溶胶-凝胶法制备高容量的富锂锰基材料，并考察了滴加速度、压片处理和掺铌改性对富锂锰基材料性能的影响。通过X射线衍射和激光颗粒粒度分析表征了材料的晶体结构和颗粒组成，并制备纽扣电池，测试了材料的电化学性能。X射线衍射测试结果表明，材料具有完整的富锂锰基材料的晶体结构。压片处理和减慢滴加速度的材料首次放电容量为210 mA·h/g左右，而掺铌改性材料的首次放电容量是250 mA·h/g左右。压片处理和掺铌改性的材料在大电流下容量有所提高。通过优化合成富锂锰基材料的实验条件，为材料的量产提供了理论依据和工艺参数支持。

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.