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Metallic MoS 2 Anchored on Reduced Graphene Oxide Sheets with Edge Orientation, and Its Electrochemical Investigation on Energy Storage Application
Author(s) -
Joseph Nikhitha,
Shafi P Muhammed,
Bose A Chandra
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201803219
Subject(s) - materials science , graphene , supercapacitor , capacitance , oxide , current density , crystallinity , electrode , lamellar structure , power density , energy storage , electrochemistry , optoelectronics , nanotechnology , composite material , metallurgy , power (physics) , chemistry , physics , quantum mechanics
MoS 2 is considered as an efficient electrode material for energy storage application due to its lamellar structure in analogs with graphene. In this report, metallic 1T‐MoS 2 is allowed to grow on reduced graphene oxide (rGO) sheets through hydrothermal treatment. The crystallinity, surface morphology and elemental composition of the as synthesized material have been carefully analyzed. As a result of fascinating surface morphology, the as‐prepared rGO/MoS 2 composites exhibit excellent electrochemical properties including high specific capacitance, long cycle life, high energy and power densities. The maximum specific capacitance of 713.4 F/g is obtained at 1 A/g current density for 10 weight % of rGO loaded MoS 2 sample in three electrode cell system. The symmetric device exhibits an outstanding specific capacitance of 170 F/g at 1 A/g current density and a 51.08% retention is obtained even at 10 A/g current density. Moreover, the symmetric device exhibits an appreciable energy density of 51.2 Wh/kg at a power density of 750 W/kg, and high capacitive retention of 88% is observed even after 10,000 charge/discharge cycles. This outstanding performance of rGO loaded 1T‐MoS 2 electrode promises its applicability in energy storage devices, especially in supercapacitors.