Confine growth of NiCo2S4 nanoneedles in graphene framework toward high-performance asymmetric capacitor

Transition metal sulfide/graphene-based composites show broad prospects as electrode materials for supercapacitors. To explore the energy storage mechanism of composites, and clarify the synergistic effect between transition metal sulfide and graphene, a series of composites have been synthesized by adjusting the addition of graphene oxide during the preparation of the composites. The results show that the addition of graphene can effectively...