| 摘 要： | 1 Results Lithium ion batteries have been widely used in modern portable electronics,such as cellular phones and notebook computers,because of their low cost,long life,and high energy density.In the lithium ion batteries,the cathode provides lithium ion source and plays a critical role to determinate the performance of battery.Lithium transition metal oxides have been investigated as active cathode materials due to their high potential versus Li/Li and large proportion of the lithium ions can be inserted/extracted reversibly.It was demonstrated that spinel LiMn2O4 was successful synthesized via the co-precipitation method and exhibited favorable electrochemical performance in both the room-temperature and elevated temperature.Layer-structured Li(NiCoMn)O2 showed excellent capacity retention and good thermal stability which was a promising cathode material.In addition,the surface modification technique was also applied to improve the performance of electrodes.
|
