溶胶-凝胶法合成锂离子电池正极材料LiMn_2O_4

Preparation of LiMn_2O_4 for lithium ion batteries by sol-gel method

以醋酸锰、硝酸锂为原料,采用乙二胺四乙酸-柠檬酸(EDTA-CA)络合法,制备了正尖晶石型LiMn2O4超细粉末晶体。应用TG-DSC,XRD,CV及恒流充放电测试等手段对前躯体及LiMn2O4粉体进行性能表征,确定了其最终的合成温度为600℃。常温下,组装成半电池,初始放电容量为120.2mAh/g,循环50次后容量保持在70%左右。

The super-fine powders of spinel LiMn2O4 were synthesized using EDTA-citric acid（EDTA-CA） by sol-gel method with manganese acetate,lithium nitrate as raw materials.The precursor and synthesized powders of LiMn2O4 were characterized by TG-DSC,XRD,CV and galvanostatic charge and discharge.It is found that the optimal sintering temperature was 600℃.At room temperature,the initial discharge capacity of the half cell was 120.2mAh/g,and the capacity can also remain 70% of initial capacity after 50 cycles.