Facile Preparation of NiO@graphene Nanocomposite with Superior Performances as Anode for Li-ion Batteries

摘要

Transition metal oxides gain considerable research attentions as potential anode materials for lithium ion batteries,but their applications are hindered due to their poor electronic conductivity,weak cycle stability and drastic volume change.Here,a NiO@graphene composite with a unique 3D conductive network structure is prepared through a simple strategy.When applied as anode material for Li-ion batteries,at 50 mA g^(−1),the NiO@graphene displays a high reversible capacity of 1366 mAh g^(−1) and a stable cyclability of 205 mAh g^(−1) after 500 cycles.Even at a high rate of 10 A g^(−1),it displays a favorable reversible capacity of 711 mAh g^(−1).Remarkably,when it recovers back to 0.05 A g^(−1),a reversible capacity of 1741 mAh g^(−1) is achieved.Thus,the NiO@graphene composite with 3D structure shows good application prospects as an alternative anode for advanced lithium ion batteries.