温度对LiNi_(0.45)Co_(0.15)Mn_(0.4)O_2性能的影响  

Influence of the sintering temperature on the performance of LiNi_(0.45)Co_(0.1)5Mn_(0.4)O_2 cathode material

作　　者：王翠玲[1,2] 姚坡元[1] 谷亦杰[2,3] 柳宏[4] 

机构地区：[1]济宁市技师学院材料工程系,山东济宁272000 [2]山东科技大学新能源材料研发中心,山东青岛266510 [3]江西省宜春市人民政府,江西宜春336000 [4]莱芜职业技术学院机电系,山东莱芜271100

出　　处：《电池工业》2012年第4期200-204,共5页Chinese Battery Industry

基　　金：山东省自然科学基金(ZR 2010EM 036);山东省博士基金项目(BS 2011CL 031);"863"项目(2009AA11A106)

摘　　要：采用共沉淀法先合成出前驱体Ni0.45Co0.15Mn0.4(OH)2,然后将其与Li2CO3均匀混合后在三种温度下烧结制得正极材料LiNi0.45Co0.15Mn0.4O2。用XRD、SEM和电池测试仪研究了烧结温度对材料结构、形貌和电化学性能的影响。结果表明:材料合成的最佳温度为900℃,在900℃条件下合成的LiNi0.45Co0.15Mn0.4O2具有较好的层状结构和较高的电化学活性,首次放电容量超过130mAh/g,8个循环后,容量保持率为99.1%,而且颗粒形貌呈球形并大小均匀适中。The LiNi0.455Co0.15Mn0.4O2 precursors was prepared by co precipitation method. LiNi0.45Co0.15Mn.01（OH）2 cathode materials were synthesized with sintering the mixtures of LiNi0.455Co0.15Mn0.4O2 and Li2CO3 at three temperatures in air by solid-state reaction method. The effects of different synthesis temperatures on the structure and morphology and electrochemical performance of LiNi0.455Co0.15Mn0.4O2 sample were analyzed by XRD and SEM respectively. The results showed that the synthesis temperature of 900 C was optimal. LiNi0.455Co0.15Mn0.4O2 sin- tered at 900℃ had better layered structure and higher electrochemical activity. The discharge ca pacity of initial cycle for LiNi0.455Co0.15Mn0.4O2 sample was more than 130 mAh/g, the capacity retention rate after 8 cycles was 99.1% of the initial discharge capacity. AndSEMmicrographrevealed that LiNi0.455Co0.15Mn0.4O2 sinte.red at 900℃ had the spherical morphology and the narrow particle size distribution and the appropriate particle size.

关 键 词：LiNi0.45Co0.15Mn0.4O2 电化学性能 温度 晶胞参数 SEM形貌 

分 类 号：TQ174.758[化学工程—陶瓷工业]