Effects of Li and Cl Codoping on the Electrochemical Performance and Structural Stability of LiMn2O4 Cathode Materials for Hybrid Electric Vehicle Applications

• DOI: 10.1021/jp310011m
• Publication Date: 2013-02-21T19:10:42Z
• Authors: Dong-Wook Han; Won-Hee Ryu; Won-Keun Kim; Ji-Yong Eom; Hyuk-Sang Kwon
• Keywords: 02 engineering and technology; 0210 nano-technology; 01 natural sciences; 7. Clean energy; 620; 0104 chemical sciences

LiMn2O4, Li1.05Mn1.95O4, and Li1.05Mn1.95O3.95Cl0.05 are prepared by a solution-based process to investigate the influences of codoping Li Cl on electrochemical performance structural stability Li1+xMn2-xO4-yCly (x, y = 0, 0.05). features an improved cycling rate capability compared with LiMn2O4 which originate from reduction in Mn dissolution into electrolyte Cl. The improvement is more appreciable at higher temperature. Further, electrode resistance much lower than that over first charge, suggesting high structurally unstable during cycling. Both suppressed reduced attributed reinforcement MnO6 octahedral framework strong ionic Mn–Cl bonds formed