Three-dimensional graphene–Co3O4 cathodes for rechargeable Li–O2 batteries

摘要: A three-dimensional (3D) graphene–Co3O4 electrode was prepared by a two-step method in which graphene initially deposited on Ni foam with Co3O4 then grown the resulting structure. Cross-linked nanosheets an open pore structure were fully and vertically distributed throughout skeleton. The free-standing binder-free monolithic used directly as cathode Li–O2 battery. This composite exhibited enhanced performance specific capacity of 2453 mA h g−1 at 0.1 cm−2 62 stable cycles 583 (1000 gcarbon−1). excellent electrochemical is associated unique architecture superior catalytic activity 3D electrode.