LiMn_2O_4 Powders Prepared from Nano-Sized Manganese Oxide Powders

• Published in: Nihon Seramikkusu Kyōkai gakujutsu ronbunshi Vol. 115; no. 1340; pp. 241 - 244
• Main Authors: Ju, Seo Hee, Kim, Do Youp, Jo, Eun Byul, Kang, Yun Chan
• Format: Journal Article
• Language: Japanese
• Published: 01.04.2007
• ISSN: 0914-5400

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.