Effect of sintering time on the electrochemical properties of spinel LiMn_2O_4 synthesized by solid-state reaction  

作　　者：Tao Li Weihua Qiu Renhua Zhao Hui Xia Hailei Zhao Jingjing Liu 

机构地区：[1]Department of Inorganic Nonmetallic Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083. China [2]General Research Institute for Nonferrous Metals, Beijing 100088, China [3]Advanced Materials for Micro- and Nano- System, Singapore-MIT Alliance, 4 Engineering Drive 3, Singapore 117576

出　　处：《Journal of University of Science and Technology Beijing》2008年第1期74-78,共5页北京科技大学学报（英文版）

基　　金：the National Natural Science Foundation of China(No.50272012).

摘　　要：LiMn2O4 powder as a cathode materials for rechargeable lithium-ion batteries was prepared by solid-state reaction from LitCO3 and electrolytic MnOz at different sintering periods （2, 6, 18, and 32 h）. X-ray diffraction （XRD） patterns of the prepared samples are identified as the spinel structure with a space group of Fd3 m. The lattice parameters almost remain the same as the sintering periods increase. The sample with a sintering period of 32 h shows good cycling performance at both low and nigh current densities, and also elevated temperature. It is believed that the excellent electrochemical behavior of this sample results from its good crystallinity and large grain size compared with other samples. Different electrochemical measurements were conducted to investigate the electrochemical properties of spinel LiMn204. 2008 University of Science and Technology Beijing. All rights reserved.LiMn2O4 powder as a cathode materials for rechargeable lithium-ion batteries was prepared by solid-state reaction from LitCO3 and electrolytic MnOz at different sintering periods （2, 6, 18, and 32 h）. X-ray diffraction （XRD） patterns of the prepared samples are identified as the spinel structure with a space group of Fd3 m. The lattice parameters almost remain the same as the sintering periods increase. The sample with a sintering period of 32 h shows good cycling performance at both low and nigh current densities, and also elevated temperature. It is believed that the excellent electrochemical behavior of this sample results from its good crystallinity and large grain size compared with other samples. Different electrochemical measurements were conducted to investigate the electrochemical properties of spinel LiMn204. 2008 University of Science and Technology Beijing. All rights reserved.

关 键 词：cathode material spinel LiMn204 sintering period microstructure electrochemical properties 

分 类 号：TG146.2[一般工业技术—材料科学与工程]