酸化マンガンナノ粉体からのLiMn_2O_4粉体の調製

概要

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Fine-sized LiMn_2O_4 powders were prepared by solid-state reaction method using the nano-sized manganese oxide powders. Nano-sized manganese oxide powders obtained by spray pyrolysis from spray solution with citric acid and ethylene glycol formed the fine-sized LiMn_2O_4 powders with regular morphology by solid-state reaction method with LiOH. The mean sizes of the LiMn_2O_4 powders prepared from the nano-sized manganese oxide increased with increasing the post-treatment temperatures. Nano-sized LiMn_2O_4 powders with regular morphology were obtained at low post-treatment temperatures below 800℃. The LiMn_2O_4 powders post-treated at 800℃ had the mean size of several hundreds nanometer and the narrow size distribution. The initial discharge capacity of the fine-sized LiMn_2O_4 powders prepared by solid-state reaction method using nano-sized Mn_2O_3 powders was 127 mAh/g. The discharge capacities of the LiMn_2O_4 powders dropped from 127 to 112 mAh/g by the 50th cycle at a current density of 0.1 C.
社団法人日本セラミックス協会の論文
2007-04-01