Abstract: Flower-like molybdenum disulfide (MoS₂) microstructures are synthesized based on three-dimensional graphene (3DG) skeleton via a simple and facile one-step hydrothermal method, aiming at constructing series of novel composite electrode materials of 3DG/MoS₂ with high electrochemical performances for supercapacitors. The electrochemical properties of the samples are evaluated by cyclic voltammetry and galvanostatic charge/discharge tests. Specifically, the optimal 3DG/MoS₂ composite exhibits remarkable performances with a high specific capacitance of 410 Fg^-1 at a current density of 1 Ag^-1 and an excellent cycling stability with ca. 803% capacitance retention after 10,000 continuous charge-discharge cycles at a high current density of 2 Ag^-1, making it adaptive for high-performance supercapacitors. The enhanced electrochemical performances can be ascribed to the combination of 3DG and flower-like MoS2, which provides excellent charge transfer network and electrolyte diffusion channels while effectively prevents the collapse, aggregation and morphology change of active materials during charge-discharge process. The results demonstrate that 3DG/MoS₂ composite is one of the attractive electrode materials for supercapacitors.

KeyWords Plus: MOS₂ NANOSHEETS; PERFORMANCE SUPERCAPACITOR; HYDROTHERMAL SYNTHESIS; HYDROGEN EVOLUTION; ENERGY-STORAGE; OXIDE; NANOSPHERES; FILMS; NANOSTRUCTURES; FRAMEWORKS

Published in JOURNAL OF POWER SOURCES, 331 180-188; 10.1016/j.jpowsour.2016.09.036 NOV 1 2016