Influences of Sintering Process of Sprayed Precursors on the Struc-ture and Electrochemical Properties of LiMn_2O_4 Cathode Material

作     者：Hui HUANG Chen WANG Lei ZHANG Yongping GAN Wenkui ZHANG 

作者机构：College of Chemical Engineering and Materials Science Zhejiang University of Technology Hangzhou 310032 China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2008年第24卷第2期

页      面：211-214页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：浙江省青年科研基金 

主　　题：Spinel LiMn2O4 Spray-drying method Li-ion batteries Sintering 

摘      要：Well-defined spinel LiMn2O4 powders were synthesized via sintering a precursor, which was prepared by spraydrying method. The effects of sintering process on the structure and electrochemical properties of LiMn2O4 were discussed. It was found that a single sintering could not synthesize a pure LiMn2O4 compound, while two-step sintering procedure consisting of decomposing sprayed precursors at 350℃ and further sintering at an elevated temperature leads to the formation of a single-phased LiMn2O4 with homogeneous particle size distribution. As compared to that sintered in air, the two-step sintered LiMn2O4 in oxygen shows tighter structure and more uniform particle size, as well as better electrochemical properties. It delivers an initial discharge capacity of 131 mAh·g^-1 （1/10C）, and still has excellent cycling stability at higher rate （1/5C）.