Cobalt Doped Orthorhombic LiMnO_2 as Cathode Materials for Lithium-Ion Batteries

摘要

Orthorhombic type LiCo_xMn_(1-x)O_2 (0<=x<=0.14) oxides have been synthesized treatment of (Co_xMn_(1-x))_3O_4 precursors and LiOH aqueous solution at 170 deg C. As-synthesized powders showed well-ordered #beta#-NaMnO_2 structures, and the products were single crystalline particle oxides from TEM observations. The particle size decreased with increasing the amount of Co substituent. Much more improved capacity upon 100 cycling was clearly seen in orthorhomibc LiCo_(0.1)Mn_(0.9)O_2, comparing to orthorhombic LiMnO_2.