焙烧分解-高温固相法制备层状锰酸锂及其性质研究  

Roasting Decomposition-High Temperature Solid State Synthesis of Layered Lithium Manganese Oxide and Its Properties

作　　者：陈海清[1] 肖湘[1] 谭令[1] 

机构地区：[1]湖南有色金属研究院,湖南长沙410100

出　　处：《湖南有色金属》2016年第6期44-49,共6页Hunan Nonferrous Metals

摘　　要：锰酸锂具有尖晶石和层状两种结构,而层状LiMnO_2具有无毒、安全、理论容量高等优点。以专用的MnO_2在空气中高温焙烧分解Mn_2O_3,与电池级LiOH·H_2O为原料,采用高温固相法,合成层状锰酸锂,其最佳合成条件为:锂锰配比为1.03,球磨均匀,经600℃温度,氩气保护气氛下,合成8h,合成的层状LiMnO_2材料,其首次充放电容量分别达到279mAh/g和171mAh/g,经20次循环后容量保持率为96.2%。合成的层状LiMnO_2材料具有相对较好的电化学性能。Lithium manganese oxides with spinel and two layered structure, and layered LiMnO2 is non-toxic, safe, high theoretical capacity advantages. By using special MnO2 in the air high temperature roasting decomposition of Mn2O3, and the battery grade LiOH. H2O as raw materials, using high temperature solid phase method, synthesis of layered lithium manganese oxide, the best synthesis conditions for lithium manganese ratio 1.03, after ball milling uniformly,the temperature of 600℃, 8 h synthesis in argon atmosphere, and layered LiMnO2 materials, the first discharge capacity reached 279 mAh/g and 171 mAh/g. After 20 cycles, the layered LiMnO2 material with the retention ratio of 96. 2% has a relatively good electrochemical performance.

关 键 词：锂离子电池 正极材料 焙烧分解 高温固相法 层状锰酸锂 

分 类 号：TM912.9[电气工程—电力电子与电力传动]