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High-performance solid-state supercapacitors based on graphene-ZnO hybrid nanocomposites

2013; Springer Science+Business Media; Volume: 8; Issue: 1 Linguagem: Inglês

10.1186/1556-276x-8-473

1931-7573

Zijiong Li, Zhihua Zhou, Gaoqian Yun, Kai Shi, Xiaowei Lv, Baocheng Yang,

Graphene research and applications

In this paper, we report a facile low-cost synthesis of the graphene-ZnO hybrid nanocomposites for solid-state supercapacitors. Structural analysis revealed a homogeneous distribution of ZnO nanorods that are inserted in graphene nanosheets, forming a sandwiched architecture. The material exhibited a high specific capacitance of 156 F g-1 at a scan rate of 5 mV.s-1. The fabricated solid-state supercapacitor device using these graphene-ZnO hybrid nanocomposites exhibits good supercapacitive performance and long-term cycle stability. The improved supercapacitance property of these materials could be ascribed to the increased conductivity of ZnO and better utilization of graphene. These results demonstrate the potential of the graphene-ZnO hybrid nanocomposites as an electrode in high-performance supercapacitors.