Journal
CARBON
Volume 107, Issue -, Pages 711-722Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2016.06.074
Keywords
Molybdenum disulfide; Nitrogen-doped graphene; Hydrogen evolution reaction; Reversible lithium storage; Ionic liquid; Hydrothermal route
Funding
- Natural Science Foundation of China [21473156, 21173190]
- International Science and Technology Cooperation Program of China [2012DFG42100]
- Research and Development Project of Zhejiang Province of China [2015C01G2010013]
- Doctoral Program of Higher Education of China [2011010113003]
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A facile one-pot hydrothermal route with the mediation of ionic liquid (IL, [BMIM]BF4) is presented to synthesize MoS2/nitrogen-doped graphene (MoS2/NG-IL) composites. It is found that as-prepared MoS2/NG-IL composites exhibit that the de-layered MoS2 sheets with more exposed edge sites and defects are well anchored on the N-doped graphene. Due to the synergism between de-layered MoS2 a nd N-doped graphene, MoS2/NG-IL composites exhibit better electrochemical performances for hydrogen evolution reaction (HER) and reversible lithium storage in comparison with MoS2. Especially, when 1.0 mL of IL is added in hydrothermal solution, the obtained MoS2/NG-IL10 displays very high electrocatalytic activity for HER with a low onset overpotential of 80 mV and a small Tafel slope of 48.0 mV/dec in 0.5 M H2SO4. As anode of lithium ion battery, MoS2/NG-IL10 delivers a reversible capacity as high as 1169 mAh g(-1) at 100 mA g(-1) and enhanced rate capability of 782 mAh g(-1) at 1000 mA g(-1). After 800 cycles, a reversible capacity of about 800 mAh g(-1) at 500 mA g(-1) can be retained, indicating its excellent cyclic stability. (C) 2016 Elsevier Ltd. All rights reserved.
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