Mixed 1T–2H Phase MoS2/Reduced Graphene Oxide as Active Electrode for Enhanced Supercapacitive Performance

• DOI: 10.1021/acsami.6b11290
• Publication Date: 2016-11-07T17:27:14Z
• Authors: Arnaud Gigot; Marco Fontana; Mara Serrapede; Micaela Castellino; Stefano Bianco; Marco Armandi; Barbara Bonelli; Candido Fabrizio ...; Elena Tresso; Paola Rivolo
• Keywords: reduced graphene oxide aerogels, molybdenum oxide, L-cysteine, molybdenum sulfide, 1T/2H phases, supercapacitor; 02 engineering and technology; 0210 nano-technology

A hybrid aerogel, composed of MoS2 sheets 1T (distorted octahedral) and 2H (trigonal prismatic) phases, finely mixed with few layers reduced graphene oxide (rGO) obtained by means a facile environment-friendly hydrothermal cosynthesis, is proposed as electrode material for supercapacitors. By electrochemical characterizations in three- two-electrode configurations symmetric planar devices, unique results have been obtained, specific capacitance values up to 416 F g-1 highly stable behavior over 50000 charge-discharge cycles. The in-depth morphological structural through field emission scanning electron microscopy, Raman, X-ray photoelectron spectroscopy, diffraction, Brunauer-Emmett-Teller, transmission microscopy analysis provides the proofs assembly such 3D structured matrix. unpacked structure exhibits an excellent distribution phase that are exposed interaction electrolyte, so available surface/near-surface redox reactions, notwithstanding quite low overall content embedded comparison other "more conventional" rGO-MoX2 electrochemically active materials, synthesized same conditions, provided support outstanding cosynthesized rGO-MoS2.