Preparation of copper-doped LiV_3O_8 composite by a simple addition of the doping metal as cathode materials for lithium-ion batteries

摘要

The copper-doped LiV_3O_8 was first prepared by mixing copper powder with solid-state synthesized LiV_3O_8 in distilled water. The electrochemical performance of the copper-doped LiV_3O_8 was compared with that of the undoped one. It was found that the electrochemical performance of the copper-doped sample is significantly improved, with an initial capacity of 265.0 mAh/g and a stabilized capacity of 227.7 mAh/g after 100 cycles. It indicates that the copper-doped LiV_3O_8 could be easily prepared by a simple addition of the doping metal.