Review of manganese-based solid solution x Li[Li 1/3 Mn 2/3 ]O 2 ·(1- x )LiMO 2

Lithium-enriched manganese-based solid solution x Li[Li1/3Mn2/3]O2&·(1- x )LiMO2 is a new cathode material for lithium ion batteries. Its reversible discharge specific capacity is higher than 250 mAh/g, which is about twice that of present applied cathode materials. This material is a potential electrode material for next generation lithium ion batteries with high energy density. However, its other electrochemical properties such as power character, low temperature performance and safety at high end-of voltage do not satisfy the needs of batteries for application in electric or hybrid electric vehicles. Much research on x Li[Li1/3Mn2/3]O2·(1- x )LiMO2 has been published, which has been reviewed in this paper as three parts: reaction mechanism, synthesis and improvement of performance. In addition to research results, the use of x Li[Li1/3Mn2/3]O2&·(1- x )LiMO2 in industry is briefly described. Directions for future research are also suggested.