Li含量对LiMnO2结构和电化学性能的影响  

The distorted oxygen octahedron with lithium elements in LiNi0.75Co0.15Mn0.1O2

作　　者：谷亦杰[1,2] 王翠玲[1,3] 黄小文[1] 周恒辉[4] 徐小明 胡勇[1] 卢诚[1] 

机构地区：[1]山东科技大学材料学院,山东青岛266510 [2]青岛澳柯玛集团有限公司新能源材料研发中心,山东青岛266510 [3]山东济宁技术学院材料工程教研室,山东济宁272013 [4]北京大学化学学院,北京100871 [5]安徽国轩高技术能源有限公司,安徽合肥230011

出　　处：《电池工业》2009年第5期291-293,共3页Chinese Battery Industry

基　　金：基金项目：高等学校基础学科专项建设基金项目（200702）和山东省留学基金项目（2007）

摘　　要：采用溶胶-凝胶法制备了不同Li含量的LiMnO2。采用XRD和SEM研究不同锂含量对于材料结构和形貌的影响。采用恒流充放电研究材料的电化学性能。研究表明,在800℃氮气保护下煅烧8h,Li/Mn=1.05的材料具有完整的正交层状结构,在0.2C的放电倍率下,表现出了最好的电化学性能,最大放电容量为173.03mAh/g,经过30次循环后的放电容量维持在172.39mAh/g。LiNi0.75Co0.15Mn0.1O2 was prepared by solid-state reaction, LiNi0.75Co0.15Mn0.1O2 crystalline structure was studied by Rietveld Refinement. The research showed that the oxygen oetahedron shape with lithium in LiNi0.75Co0.15Mn0.1O2 was distorted. The length of the twelve edge in octahedron was different. The different length edges of the octahedron separated into two groups with six edges respectively, one of which had the length of 3.086 9 A, another of which had the length of 2.878 0 ,A. The analysis showed that transition elements and lithium caused the different length of octahedron edges with lithium in LiNi0.75Co0.15Mn0.1O2.

关 键 词：锂离子电池 正极材料 LIMNO2 

分 类 号：TM2[一般工业技术—材料科学与工程] TM912.9[电气工程—电工理论与新技术]