摘要
采用溶剂热法合成了Sr2+掺杂的LiMn1-xSrxPO4/C(x=0,0.01,0.03,0.05)),并利用XRD、SEM、EIS和电化学性能测试技术对磷酸锰锂的形貌、微观结构及电化学性能进行了表征。正极材料LiMn0.99Sr0.01PO4/C(LSr1)表现出较高的放电容量和较好的循环性能。在0.1C的放电倍率下循环50周之后,LSr1的容量为119.2mA·h·g-1,循环保持率分别为95.5%。
LiMn1-xSrxPO4/C（x = 0, 0.01, 0.03, 0.05） were synthesized by the solvothermal synthesis. The effect of Sr doping was studied by the X-ray diffraction pattern, scanning electronic microscopy, electrochemical impedance spectroscopy and charge/discharge measurement techniques. The LiMn0.99Sr0.01PO4/C（LSr1） shows the high discharge capacity and the best cycling stability among all the samples. It can deliver the highest discharge capacity of 119.2 m A·h·g^-1 with 95.5% capacity retention after 50 cycles at 0.1 C.
出处
《当代化工》
CAS
2015年第10期2286-2288,2293,共4页
Contemporary Chemical Industry
关键词
磷酸锰锂
锶掺杂
正极材料
锂离子电池
Lithium manganese phosphate
Strontium doping
Cathode material
Lithium-ion battery
