A novel binder-free electrode of graphene film upon intercalation of hollow MoS2 spheres for enhanced supercapacitor performance

An electrode based on hollow MoS2 spheres intercalated graphene film was firstly fabricated. When used as an electrode in a supercapacitor, the unique structure can provide electrically conducting channels to promote electrolyte penetration and utilize their surface as much as possible. Thus, the resultant binder-free electrode demonstrated a high specific capacity of 286.8 F g(-1) more than 2 times of pure MoS2 hollow spheres (116.4 F g(-1)). A supercapacitor based on MoS2/grapheme and active carbon can achieve a maximum energy density of 22.0 W h k(-1) at 800 W kg(-1). The outstanding electrochemical properties of the hybrid electrode demonstrate that it holds great potential for the next-generation energy storage applications.