Microwave aided scalable synthesis of sulfur, nitrogen co-doped few-layered graphene material for high-performance supercapacitors

Rotte, Naresh Kumar and Naresh, Vangapally and Muduli, Sadananda and Reddy, Venu and Srikanth, V.V.S. and Martha, Surendra K. (2020) Microwave aided scalable synthesis of sulfur, nitrogen co-doped few-layered graphene material for high-performance supercapacitors. Electrochimica Acta, 363. p. 137209. ISSN 00134686

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Abstract

Doping with heteroatoms has become an approach for improving the electrochemical performance of few-layered graphene. In this work, Sulfur-nitrogen co-doped few-layered graphene synthesized from the graphite flakes acid treated with H2SO4 and HNO3 followed by microwave irradiation. Sulfur-nitrogen co-doped few-layered graphene consists of less than 15 graphene layers with a high degree of graphitization. The supercapacitor exhibited a specific energy density of 15 Wh kg−1 at a power density of 300 W kg−1at room temperature in aqueous electrolyte. The S, N-FLG electrodes show the specific capacitance of 298 F g−1 at a current density of 1 A g−1and stable over 10,000 continuous charge-discharge cycles with 95% capacitance retention at 1 A g−1. The obtained capacitance is due to maximum utilization of few-layered graphene sheets, highest intrinsic surface capacitance due to the synergetic effect of the formation of N-S-H hydrogen bonds and S, N co-doping in graphene aromatic rings.

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IITH Creators:
IITH CreatorsORCiD
Rotte, Naresh KumarUNSPECIFIED
Naresh, VangapallyUNSPECIFIED
Muduli, SadanandaUNSPECIFIED
Martha, Surendra Kumarhttps://orcid.org/0000-0002-7762-7237
Item Type: Article
Uncontrolled Keywords: Aqueous electrolyte; Capacitance retention; Charge-discharge cycle; Electrochemical performance; Intrinsic surfaces; Scalable synthesis; Specific capacitance; Specific energy density
Subjects: Chemistry
Divisions: Department of Chemistry
Depositing User: . LibTrainee 2021
Date Deposited: 12 Jul 2021 09:47
Last Modified: 12 Jul 2021 09:47
URI: http://raiith.iith.ac.in/id/eprint/8248
Publisher URL: http://doi.org/10.1016/j.electacta.2020.137209
OA policy: https://v2.sherpa.ac.uk/id/publication/4625
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