Journal
APPLIED SURFACE SCIENCE
Volume 396, Issue -, Pages 994-999Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2016.11.074
Keywords
Rambutan; MoS2; Carbon spheres; Specific capacitance
Categories
Funding
- National Natural Science Foundation of China [11374013, 51672001, 11404001, 51502002]
- Outstanding young talent fund of Anhui Province [J05201424]
- Research Fund for the Doctoral Program of Higher Education of China [20133401110002]
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A novel rambutan-like composite of MoS2/mesoporous carbon spheres were synthesized by a simple two-step hydrothermal and post-annealing approach via using glucose as C source and Na2MoO4 center dot 2H(2)O and thiourea as Mo and S sources. It is found that the morphology and electrochemical properties can be effectively controlled by the change of the weight ratio of coated MoS2 sheets to carbon spheres. When used as electrode material for supercapacitor, the hybrid MoS2/carbon spheres show a high specific capacity of 411 F/g at a current density of 1 A/g and 272 F/g at a high discharge current density of 10 A/g. The annealing treatment at 700 degrees C transformed the core carbon spheres into mesoporous ones, which served as the conduction network and favor the enhancement of the specific capacitance. In addition, the strain released during the charge/discharge process can be accommodated and the structural integrity can be kept, improving the cycling life. After 1000 cycles, the capacitance retention of the hybrid MoS2/carbon spheres is 93.2%. (C) 2016 Elsevier B. V. All rights reserved.
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