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 Li0.04 V2 O5 ) can be used as cathode material for lithium ion batteries. Herein, Li0.04 V2 O5 nanowires are densely anchored onto reduced graphene oxide (rGO) nanosheets to form a Li0.04 V2 O5 @rGO nanocomposite by a hydrothermal method with subsequent thermal treatment. Due to this unique structure, the Li0.04 V2 O5 @rGO exhibits remarkable rate performance and excellent cycling stability. Specifically, it delivers a reversible discharge capacity of 738.09mAhg-1 at a current density of 100mAg-1 in the voltage range of 2.0-4.0V. After 500 cycles, it still maintains a high capacity of 731.70mAhg-1 , which represents 95.01% retention of the original reversible capacity. These results indicate that the Li0.04 V2 O5 @rGO could be a promising candidate as cathode active material for long-term cycling performance in lithium-ion batteries.