微波法制备Li_2Fe_(1-x-y)Mn_xNi_ySiO_4/C复合材料的性能  

Performance of Li_2Fe_(1-x-y)Mn_xNi_ySiO_4/C composite prepared by microwave method

作　　者：马利华[1] 张胜利[1] 王亚萍[1] 宋延华[1] 

机构地区：[1]郑州轻工业学院材料与化学工程学院,河南郑州450002

出　　处：《电池》2013年第3期163-165,共3页Battery Bimonthly

摘　　要：采用微波法制备Li2Fe1-x-yMnxNiySiO4/C复合正极材料,用XRD、SEM、恒流充放电及交流阻抗测试等方法对材料进行分析,研究锰和镍的掺杂量对硅酸亚铁锂结构及性能的影响。制备的材料属正交晶系,颗粒细小,呈类球形,粒径约为100～150 nm,团聚不明显。以C/16在1.5～4.8 V充放电,x=y=0.2的样品首次放电比容量为119.17 mAh/g。Li2Fe1-x-yMnxNiySiO4/C composite was prepared by microwave method. The material was analyzed by XRD, SEM, galvanostatic charge-discharge and A.C. impedance to study the effects of Mn and Ni doping amounts to the structure and performance of silicate ferrous lithium. The prepared materials belonged to orthorhombic system, the particles was small with the ball-liked shape,about 100 - 150 nm. When cycled at C/16 in 1.5 - 4. 8 V, the material in which x - y = 0. 2 had the initial discharge capacity of 119. 17 mAh/g.

关 键 词：微波法 正极材料 硅酸亚铁锂(Li2FeSiO4) 

分 类 号：TM912.9[电气工程—电力电子与电力传动]