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The increasingly prominent energy and environment problems accelerate the rapid development of the lithium ion batteries.LiNi0.5Mn1.5O4 (LNMO) possesses a specific capacity of about 140 mA h g-1 and higher operational voltage (~4.7 V vs.Li+/Li) than those of LiMn2O4.[1] It has been regarded as a promising cathode material for lithium ion batteries.In recent years, various methods have been used to improve the electrochemical performances.