In order to improve the electrochemical performance of Li4Ti5O12,Li4Ti5O12 was modified by Cu2+ doping in Li position,and Li4-xCuxTi5O12 composite was prepared.The materials were characterized by XRD,SEM and EDS.The material was made into electrode and assembled into button cell.The electrochemical performance of the material was tested by blue cell test system and electrochemical workstation.The results shown that doping Li4Ti5O12 with Cu2+ in Li position can affect the crystal structure of Li4Ti5O12,reduced the particle size,and improved the electrochemical performance of Li4Ti5O12.The first discharge specific capacity of Li3.8Cu0.2Ti5O12 at 0.2C was 173.30mA/g,and the cycle holding rate of 100 times charge discharge was 96.64%,which shown excellent charge discharge cycle performance.
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