2D hybrid sheets of V2O5 and reduced graphene oxide (rGO/V2O5) have been synthesized using a hydrothermal method. With the addition of tiny amount of rGO content (6.25%), the proper conductivity and accessibility of hybrid nanosheets for lithium ion migration are obviously promoted. Compared with the bare V2O5 sheets, the rGO/V2O5 hybrid sheets exhibited enhanced electrochemical performance in terms of improved cycling stability (nearly 81.5% capacity retention after 200 cycles), high reversible capacity of 249 mA h g?1 at a current density of 100 mA g?1 and good rate capability for the half cell. Significantly, a Li-metal-free full battery is assembled successfully, with rGO/V2O5 hybrid sheets and lithiated graphite for cathodes and anodes, respectively. This full Li-ion battery exhibits a superior specific capacity of 213 mA h g?1 at a current density of 100 mA g?1 and a high specific energy density of 106.5 W h kg?1 as a result. The good electrochemical performance suggests that this unique 2D hybrid material could be a promising candidate as a cathode material for lithium-ion batteries in the near future.
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