, Volume 4, Issue 4, pp 353-358,
Open Access This content is freely available online to anyone, anywhere at any time.
Date: 22 Jan 2009

LiMn2 O4–y Br y Nanoparticles Synthesized by a Room Temperature Solid-State Coordination Method


LiMn2O4–y Br y nanoparticles were synthesized successfully for the first time by a room temperature solid-state coordination method. X-ray diffractometry patterns indicated that the LiMn2O4–y Br y powders were well-crystallized pure spinel phase. Transmission electron microscopy images showed that the LiMn2O4–y Br y powders consisted of small and uniform nanosized particles. Synthesis conditions such as the calcination temperature and the content of Br were investigated to optimize the ideal condition for preparing LiMn2O4–y Br y with the best electrochemical performances. The optimized synthesis condition was found in this work; the calcination temperature is 800 °C and the content of Br is 0.05. The initial discharge capacity of LiMn2O3.95Br0.05 obtained from the optimized synthesis condition was 134 mAh/g, which is far higher than that of pure LiMn2O4, indicating introduction of Br in LiMn2O4 is quite effective in improving the initial discharge capacity.