Facile synthesis of molybdenum disulfide/nitrogen-doped graphene composites for enhanced electrocatalytic hydrogen evolution and electrochemical lithium storage. (October 2016)

• Record Type: Journal Article
• Authors: Ye, Jianbo; Yu, Zheting; Chen, Weixiang; Chen, Qiannan; Xu, Shurui; Liu, Run
• Is Part Of: Carbon. Volume 107(2016)
• Page Start: 711
• Page End: 722
• Publication Date: 2016-10
• Subjects: Molybdenum disulfide -- Nitrogen-doped graphene -- Hydrogen evolution reaction -- Reversible lithium storage -- Ionic liquid -- Hydrothermal route; Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2016.06.074
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: 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 and 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 H2 SO4 . 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.