One-pot hydrothermal synthesis of molybdenum nickel sulfide with graphene quantum dots as a novel conductive additive for enhanced supercapacitive performance

Sangabathula, Omkar and Sharma, Chandra Shekhar (2020) One-pot hydrothermal synthesis of molybdenum nickel sulfide with graphene quantum dots as a novel conductive additive for enhanced supercapacitive performance. Materials Advances, 1 (8). pp. 2763-2772. ISSN 2633-5409

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Abstract

We depict a facile as well as an economical one-step hydrothermal method, for the first time, to synthesize a hierarchical three-dimensional (3D) flower-like structure of molybdenum (Mo) particle decorated nickel sulfide and its composite with graphene quantum dots (GQDs) for high-performance supercapacitor applications. An optimum coupling of GQDs with Mo doped nickel sulfide (MNS-G) enhances the electrical conductivity further by creating more active sites and thus helps in modulating the electrochemical behavior of the composite. The prepared MNS-G-2.5 composite (2.5 wt% GQD) exhibits a superior specific capacitance of 2622 F g-1 at 1 A g-1 and shows an excellent coulombic efficiency of 92.2% after 10 000 cycles at a current density as high as 20 A g-1. The fabricated aqueous-based asymmetric supercapacitor device exhibits an excellent energy density of 38.9 W h kg-1 at a power density of 416.6 W kg-1 with an impressive capacitance retention and coulombic efficiency of 96.4% and 95.9%, respectively, after 10 000 charge-discharge cycles. These outstanding electrochemical properties of GQD- and molybdenum-incorporated nickel sulfide pave the way for the development of efficient electrode materials for practical supercapacitor applications. This journal is © The Royal Society of Chemistry.

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IITH Creators:
IITH CreatorsORCiD
Sharma, Chandra Shekharhttps://orcid.org/0000-0003-3821-1471
Item Type: Article
Uncontrolled Keywords: hydrothermal synthesis,graphene quantum,supercapacitive,
Subjects: Chemical Engineering
Divisions: Department of Chemical Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 16 Nov 2022 05:33
Last Modified: 16 Nov 2022 05:33
URI: http://raiith.iith.ac.in/id/eprint/11287
Publisher URL: http://doi.org/10.1039/d0ma00593b
OA policy: https://v2.sherpa.ac.uk/id/publication/41211
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