Lithium vanadate nanowires@reduced graphene oxide nanocomposites on titanium foil with super high capacities for lithium-ion batteries.

With a theoretically high capacity and suitable discharge/charge plateaus, lithium vanadates (such as LiVO) can be used as cathode material for lithium ion batteries. Herein, LiVO nanowires are densely anchored onto reduced graphene oxide (rGO) nanosheets to form a LiVO@rGO nanocomposite by a hydrothermal method with subsequent thermal treatment. Due to this unique structure, the LiVO@rGO exhibits remarkable rate performance and excellent cycling stability. Specifically, it delivers a reversible discharge capacity of 738.09mAhg at a current density of 100mAg in the voltage range of 2.0-4.0V. After 500 cycles, it still maintains a high capacity of 731.70mAhg, which represents 95.01% retention of the original reversible capacity. These results indicate that the LiVO@rGO could be a promising candidate as cathode active material for long-term cycling performance in lithium-ion batteries.