Cobalt Sulfide/Graphene Composite Hydrogel as Electrode for High-Performance Pseudocapacitors

• DOI: 10.1038/srep21717
• Publication Date: 2016-02-16T12:54:05Z
• Authors: Xiaoqian Meng; Jin Deng; Junwu Zhu; Huiping Bi; Erjun Kan; Xin Wang
• Keywords: Pseudocapacitor; Cobalt sulfide

Abstract Graphene and its composite hydrogels with interconnected three-dimensional (3D) structure have raised continuous attention in energy storage. Herein, we describe a simple hydrothermal strategy to synthesize 3D CoS/graphene hydrogel (CGH), which contains the reduction of GO sheets anchoring CoS nanoparticles on graphene sheets. The formed special endows this high electrochemical performance. Remarkably, obtained CGH exhibits specific capacitance ( C s ) 564 F g −1 at current density 1 A (about 1.3 times higher than pure CoS), superior rate capability stability. It is worth mentioning that methodology readily adaptable decorating onto may be extended preparation other pseudocapacitive materials based for applications.