3D ternary nanocomposites of molybdenum disulfide/polyaniline/reduced graphene oxide aerogel for high performance supercapacitors

摘要

In this study, we report a feasible method to synthesize a ternary nanocomposite, molybdenum disulfide/polyaniline/reduced graphene oxide aerogel (MoS2/PANI/rGO), via a two-step approach. Molybdenum disulfide/polyaniline (MoS2/PANI) is prepared by in situ polymerization. Graphene oxide is well-dispersed by loading MoS2/PANI nanoparticles (50-80 nm in size) and reduced using urea via a hydrothermal treatment, achieving the ternary nanocomposite. As for the composites prepared at different mass ratios of MoS2/PANI to rGO, the ternary MoS2/PANI/rGO with a mass ratio of 1:1 has a high specific capacitance of 618 F g(-1) at 1.0 A g(-1) and 476 F g(-1) at 20 A g(-1) with a retainment of 96% in a three-electrode system, in comparison to the specific capacitance of 418 F g(-1) at 1.0 A g(-1) and 78% retained capacitance after 2000 cycles of MoS2/PANI electrode. The combined effects between the three components in the ternary composite aerogels taking advantage of both charging and faradaic processes can readily explain the excellent electrochemical performance. (C) 2015 Elsevier Ltd. All rights reserved.