陈化过程对LiNi_(0.8)Co_(0.1)Mn_(0.1)O_2组织结构及电化学性能的影响  

Influence of Aging Process on Organizational Structure and Electrochemical Performance of LiNi_(0. 8)Co_(0. 1)Mn_(0. 1)O_2

作　　者：刘良彬[1] 郑录 王剑华[1] 郭玉忠[1] 夏凯[1] 

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093

出　　处：《昆明理工大学学报（自然科学版）》2014年第1期15-20,共6页Journal of Kunming University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(20363002);国家自然科学基金联合项目(U1202272)

摘　　要：采用共沉淀法制得的不同陈化时间前驱体均由α-Ni(OH)2和β-Ni(OH)2两相混合组成.随着前驱体中α-Ni(OH)2相对含量增大,对应烧结产物LiNi0.8Co0.1Mn0.1O2的峰强比I(003)/I(104)越大,层状结构越完整,阳离子混排度越小,说明α-Ni(OH)2相的存在可以抑制阳离子混排.陈化12 h前驱体制得的LiNi0.8Co0.1Mn0.1O2峰强比I(003)/I(104)=1.27,其首次放电容量121.9 mA·h/g,30次循环后放电容量113.1 mA·h/g,容量保持率92.8%,其质量比容量大,循环性能好.Coprecipitation method is adopted to prepare precursors of Ni0. 8 Co0.1 Mn0. 1 （OH） 2 at different aging time, which are all composed of two phases, namely a - Ni （OH） 2 and β - Ni （OH） 2- With the increase of the relative content of a- Ni（ OH）2 in precursors, peak intensity ratios I（003）/I（104） of corresponding sintered products LiNi0.8Co0.1Mn0.1O2 get larger, the layer structure is more complete and the cation mixing degree becomes smaller, which indicates that a - Ni （ OH ） 2 phase can inhibit cation mixing. LiNi0.8 Co0. 1 Mn0.1O2 obtained by precursor aged 12 h has a peak intensity ratio of I（003）/I（104） = 1.27. Its discharge capacity is initially 121.9 mA . h/g and retains 113.1 mA . h/g after 30 cycles, with the capacity retention rate of 92. 8%, which proves that the quality specific capacity of LiNi0.8 Co0.1Mn0.1O2 is large and its cycle performance is good.

关 键 词：锂离子电池 正极材料 陈化时间 组织结构 电化学性能 

分 类 号：TM912.9[电气工程—电力电子与电力传动]