富锂掺杂Li_(1.06)Co_(0.05)Cr_(0.1)Mn_(1.85)O_4的合成及电化学性能研究  

Synthesis and Characterization of Lithium-rich Li_(1.06)Co_(0.05)Cr_(0.1)Mn_(1.85)O_4 Powders

作　　者：高媛[1] 赖琼钰[1] 韦旎妮[1] 胡向贵[1] 卢集政[1] 李月峰[1] 

机构地区：[1]四川大学化学学院,成都610064

出　　处：《无机化学学报》2005年第5期778-782,共5页Chinese Journal of Inorganic Chemistry

基　　金：教育部博士点基金资助项目(No.20020610027)。

摘　　要：Li1.06Co0.05Cr0.1Mn1.85O4 powders were prepared by heating metal-urea nitrate complexes precursors. The influence of synthesis conditions on the structural and electrochemical properties of Li1.06Co0.05Cr0.1Mn1.85O4 was investigated by X-ray diffraction, scanning electron microscopy and charge-discharge experiments. The powders were well crystallized and with a narrow particle size distribution and regular morphology about 60 nm. Electrochemical performances indicated that Li1.06Co0.05Cr0.1Mn1.85O4 delivered a high capacity of 191 mAh·g-1 at 14th cycle due to additional 3 V (vs Li) plateau, 145 mAh·g-1 at 22st cycle. The results show that there are two pairs of voltammetric wave (centered at 4 V (vs Li)) and a pairs of voltammetric wave (centered at 3 V (vs Li)), indicating an excellent reversibility.Li1.06Co0.05Cr0.1Mn1.85O4 powders were prepared by heating metal-urea nitrate complexes precursors. The linfluence of synthesis conditions on the structural and electrochemical properties of Li1.06Co0.05Cr0.1Mn1.85O4 was investigated by X-ray diffraction, scanning electron microscopy and charge-discharge experiments. The powders were well crystallized and with a narrow particle size distribution and regular morphology about 60 nm. Electrochemical performances indicated that Li1.06Co0.05Cr0.1Mn1.85O4 delivered a high capacity of 191 mAhˆ g(-1) at 14(th) cycle due to additional 3 V (vs Li) plateau, 145 mAhˆ g(-1) at 22(st) cycle. The results show that there are two pairs of voltammetric wave (centered at 4 V (vs Li)) and a pairs of voltammetric wave (centered at 3 V (vs Li)), indicating an excellent reversibility.

关 键 词：性能研究 电化学 锂掺杂 EXCELLENT PLATEAU 合成 WAVE and The with high SHOW the was are 

分 类 号：TS202.3[轻工技术与工程—食品科学] G633.41[轻工技术与工程—食品科学与工程]