In-situ formation of mesoporous SnO2@C nanocomposite electrode for supercapacitors

Rani, Malothu Usha and Naresh, Vangapally and Damodar, Devarakonda and Muduli, Sadananda and Martha, Surendra Kumar and Deshpande, Atul Suresh (2021) In-situ formation of mesoporous SnO2@C nanocomposite electrode for supercapacitors. Electrochimica Acta, 365. p. 137284. ISSN 00134686

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In this work, we report a supercapacitor based on SnO2@C composite electrode with better electrochemical performance. SnO2@C composite is synthesized from porous polymer beads by the impregnation method. The resultant composite is porous and retains uniform spherical morphology of polymer beads. The composite exhibits the bimodal distribution of pores with a specific surface area of 286 m2g−1. SnO2@C composite electrode show specific capacitance of 432 F g−1 at 1 A g−1 in 1M KOH electrolyte with capacitance retention of 95.5% for 2000 cycles. Besides, the composite electrode shows an energy density of 29.4 Wh kg−1 at a power density of 418 W kg−1 at 1 A g−1 current density. The optimize electrode design improves cyclic stability due to reducing crystal growth of SnO2 as well as diffusion kinetics because of the presence of bimodal pores which provides continuous electron path. The bimodal micropores and mesopores in carbon matrix have the accessibility of electrolyte to SnO2, improving overall electrochemical performance and therefore SnO2@C composite is suitable as electrode material for supercapacitors.

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IITH Creators:
IITH CreatorsORCiD
Rani, Malothu UshaUNSPECIFIED
Naresh, VangapallyUNSPECIFIED
Damodar, DevarakondaUNSPECIFIED
Muduli, SadanandaUNSPECIFIED
Martha, Surendra KumarUNSPECIFIED
Deshpande, Atul Suresh0000-0003-0874-9502
Item Type: Article
Uncontrolled Keywords: Bimodal distribution; Capacitance retention; Electrochemical performance; Impregnation methods; Nanocomposite electrodes; Porous polymer beads; Specific capacitance; Spherical morphologies
Subjects: Others > Metallurgy Metallurgical Engineering
Materials Engineering > Materials engineering
Divisions: Department of Material Science Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 12 Jul 2021 06:59
Last Modified: 12 Jul 2021 06:59
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