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Sonochemical synthesis of 2D-2D MoSe2/Graphene nanohybrid electrode material for asymmetric supercapacitors

Abstract

Molybdenum selenide (MoSe2) nanosheets are prepared by a simple and facile sonochemical route. To optimize the synthesis process, the sonication is carried out at three different time durations (15, 30 and 45 min) with a constant power of 500 W. In order to improve the electrochemical performance of exfoliated MoSe2 nanosheets, we report the hybrid of 2D-MoSe2 with 2D-graphene by a simple solvothermal method. The exfoliated MoSe2 nanosheets are perpendicularly oriented on the surface of graphene nanosheets. These MoSe2 nanosheet edges have more electrochemical active sites and graphene sheets provide an effective mass transportation of ions at the electrode-electrolyte interface. The cyclic voltammetry reveals the pseudocapacitive behaviour of MoSe2/G nanohybrid based electrode. From the galvanostatic charge-discharge studies, the specific capacitance is found to be 945 F g-1 at the current density of 1 A g-1. An asymmetric supercapacitor (ASC) device is fabricated which delivers a specific capacitance of 75 F g-1 (@ 1 A g-1) with the energy density of 26.6 W h kg-1 and the power density of 0.8 kW kg-1 and retains 88% of its capacitance even after 3000 cycles.

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Publication details

The article was received on 04 Sep 2018, accepted on 06 Dec 2018 and first published on 06 Dec 2018


Article type: Paper
DOI: 10.1039/C8SE00446C
Citation: Sustainable Energy Fuels, 2019, Accepted Manuscript
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    Sonochemical synthesis of 2D-2D MoSe2/Graphene nanohybrid electrode material for asymmetric supercapacitors

    B. Kirubasankar, S. Vijayan and S. Angaiah, Sustainable Energy Fuels, 2019, Accepted Manuscript , DOI: 10.1039/C8SE00446C

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