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 dis tribution and excellent phase-pure particles have been synthesized at low temperatures from metal acetate aqueous solution containing glycin e as a chelating agent by a sol-gel method. The dependence of the phys icochemical properties and cycling characteristics of the spinel LiMn2 O4 powders on the various calcination temperatures has been extensivel y studied. It was found that the physicochemical properties of the LiM n2O4 powders could be controlled by simply varying the calcination tem perature. Glycine-assisted LiMn2O4 powders have shown excellent rechar geability and delivered discharge capacity of 119 mAh/g for more than 150th cycles in Li/polymer electrolyte/LiMn2O4 cells.