Synthesis and cycling behavior of LiMn2O4 cathode materials prepared by glycine-assisted sol-gel method for lithium secondary batteries

Spinel-type LiMn₂O₄ powders having submicron, narrow particle-size distribution and excellent phasepure particles have been synthesized at low temperatures from metal acetate aqueous solution containing glycine as a chelating agent by a sol-gel method. The dependence of the physicochemical properties and cycling characteristics of the spinel LiMn₂O₄ powders on the various calcination temperatures has been extensively studied. It was found that the physicochemical properties of the LiMn₂O₄ powders could be controlled by simply varying the calcination temperature. Glycine-assisted LiMn₂O₄ powders have shown excellent rechargeability and delivered discharge capacity of 119 mAh/g for more than 150th cycles in Li/polymer electrolyte/liMn₂O₄ cells.