Molten salt combustion synthesis of LiMn2O4 at 600℃:the effect of calcination time
Spinel LiMn2O4 were prepared by a molten salt combustion method at 600℃.The phase composition of the products was investigated by X-ray diffraction (XRD),and the electrochemical performance was tested by a coin-type self battery.XRD results presented that the purity and the crystallinity of the products increased with extending calcining time.Single phase LiMn2O4 could be prepared at 600℃ for 6 and 12h.The ratio of lithium/manganese also affected the phase compositions of the products.The purity and crystallinity of the product with the molar ratio of Li/Mn=l.1/2 were higher than these of the product with the molar ratio of Li/Mn=l.05/2.The performance tests indicated that the electrochemical performance of the product prepared at 600℃ for 6h is the best.The initial discharge capacity was 112.8mAh/g,and after 20 cycles,the capacity retention is 81.8%.The product with Li/Mn=l.1/2 had better electrochemical performance than the product with Li/Mn=l.05/2.
lithium ion batteries spinel combustion method molten salt
Guiyang Liu Junming Guo Baosen Wang Ying He
College of Science, Honghe University, Mengzi Yunnan, China 661100 Key Laboratory of Ethnic Medicine Resource Chemistry, State Ethnic Affairs Commission & Ministry of
国际会议
重庆
英文
457-460
2011-06-23（万方平台首次上网日期，不代表论文的发表时间）