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In situ encapsulation of tin oxide and cobalt oxide composite in porous carbon for high-performance energy storage applications

Pal, Bhupender and Krishnan, Syam G. and Vijayan, Bincy Lathakumary and Harilal, Midhun and Yang, Chun-Chen and Ezema, Fabian I. and M. M., Yusoff and Rajan, Jose (2018) In situ encapsulation of tin oxide and cobalt oxide composite in porous carbon for high-performance energy storage applications. Journal of Electroanalytical Chemistry, 817. pp. 217-225. ISSN 1572-6657

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Abstract

Herein, we report the preparation of porous carbon from palm kernel shell and loading of tin oxide‑cobalt oxide in its pores using a facile in-situ encapsulation synthesis strategy. The as-synthesized SnO2/Co3O4@C composite was characterized by powder X-ray diffraction, X-ray photoelectron spectroscopy and field-emission scanning electron microscopy techniques. This composite was used as an electrode for supercapacitors. Electrochemical charge storage capabilities of the composite were measured using cyclic voltammetry, charge-discharge cycling and electrochemical impedance spectroscopy in aqueous 6 M KOH and 1 M Na2SO4 electrolytes. The SnO2/Co3O4@C composite showed over 70% higher specific capacitance (177 F g−1) than the pure porous carbon (106 F g−1) in 6 M KOH. Among these electrolytes, the composite exhibited an enhanced electrochemical performance in KOH electrolyte due to its smaller hydrated ion radius, high ionic mobility and lower equivalent series resistance than Na2SO4.

Item Type: Article
Additional Information: Indexed by Scopus
Uncontrolled Keywords: Electrochemical double layer capacitors; Pseudocapacitors; Hybrid Capacitors; Renewable Energy; Charge storage materials
Subjects: Q Science > Q Science (General)
Faculty/Division: Faculty of Industrial Sciences And Technology
Depositing User: Mrs. Neng Sury Sulaiman
Date Deposited: 28 Jan 2019 08:40
Last Modified: 28 Jan 2019 08:40
URI: http://umpir.ump.edu.my/id/eprint/23045
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