中國有色金屬學報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 14 No. 3 June 2004 |
YU Bing(于 冰), GUO Zhao-jing(郭兆靖)
（School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China）
Abstract:The spinel LiMn2O4 was made from Li2CO3and MnO2by combining the soft chemical treatment with the solid state reaction. The heating temperature was auto-controlled by program and the two-step treatment was adopted. The synthesis mechanism of the spinel LiMn2O4was studied by TGA-DTA analysis. It is found that the reaction of Li2CO3and MnO2will occur at the temperature lower than 600℃and MnO2has self-catalysis function during the reaction. The re-
sults of XRD and SEM to the synthesized materials show that the LiMn2O4 phase is pure, with regular appearance and uniform granularity distribution. The electrochemical tests indicate that the spinel LiMn2O4 has perfect cycling performances and the cycling capacity still keeps at 109.6 mA·h/g after 5 cycles.
Key words: lithium batteries; LiMn2O4; mechanism; combination; soft chemical treatment and solid state reaction
