Highly Active 2D Layered MoS2-rGO Hybrids for Energy Conversion and Storage Applications

作者：Kamila Swagatika; Mohanty Bishnupad; Samantara Aneeya K; Guha Puspendu; Ghosh Arnab; Jena Bijayalaxmi; Satyam Parlapalli V; Mishra B K; Jena Bikash Kumar

来源：Scientific Reports, 2017, 7(1): 8378.

DOI：10.1038/s41598-017-08677-5

The development of efficient materials for the generation and storage of renewable energy is now an urgent task for future energy demand. In this report, molybdenum disulphide hollow sphere (MoS2-HS) and its reduced graphene oxide hybrid (rGO/MoS2-S) have been synthesized and explored for energy generation and storage applications. The surface morphology, crystallinity and elemental composition of the as-synthesized materials have been thoroughly analysed. Inspired by the fascinating morphology of the MoS2-HS and rGO/MoS2-S materials, the electrochemical performance towards hydrogen evolution and supercapacitor has been demonstrated. The rGO/MoS2-S shows enhanced gravimetric capacitance values (318 +/- 14 Fg(-1)) with higher specific energy/power outputs (44.1 +/- 2.1 Whkg(-1) and 159.16 +/- 7.0 Wkg(-1)) and better cyclic performances (82 +/- 0.95% even after 5000 cycles). Further, a prototype of the supercapacitor in a coin cell configuration has been fabricated and demonstrated towards powering a LED. The unique balance of exposed edge site and electrical conductivity of (rGO/MoS2-S shows remarkably superior HER performances with lower onset over potential (0.16 +/- 0.05V), lower Tafel slope (75 +/- 4 mVdec(-1)), higher exchange current density (0.072 +/- 0.023 mAcm(-2)) and higher TOF (1.47 +/- 0.085 s(-1)) values. The dual performance of the rGO/MoS2-S substantiates the promising application for hydrogen generation and supercapacitor application of interest.

• 出版日期2017-8-21