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Characterization of MgCo2O4 as an Electrode for High Performance Supercapacitors

Rajan, Jose and Krishnan, Syam G. and Midhun, Harilal and Baiju, Vidyadharan and Izan Izwan, Misnon and Mohd Hasbi, Ab. Rahim and Jamil, Ismail (2015) Characterization of MgCo2O4 as an Electrode for High Performance Supercapacitors. Electrochimica Acta, 161. 312-321. ISSN 0013-4686

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Abstract

Metal cobaltites have promising electrochemical properties for their application as an energy storage medium. In this paper, usefulness of MgCo2O4 as a supercapacitor electrode is demonstrated and compared its performance with two other cobaltites, MnCo2O4 and CuCo2O4. The materials are synthesized using molten salt method and characterized by X-ray diffraction, scanning electron microscopy, BET surface area, cyclic voltammetry, galvanostatic charge–discharge cycling, and electrochemical impedance spectroscopy techniques. The MgCo2O4 electrodes show superior charge storage properties in 3 M LiOH among a diverse choice of electrolytes. The MgCo2O4 show higher theoretical (∼3122 F/g) and practically achieved capacitance (∼320 F/g), larger coulombic efficiency, and cycling stability than the other two; therefore, it could be developed as a low-cost energy storage medium.

Item Type: Article
Uncontrolled Keywords: Electrochemical energy storage; Pseudocapacitors; Asymmetric capacitors; Lithium ion battery
Subjects: T Technology > T Technology (General)
Q Science > Q Science (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Q Science > QD Chemistry
Q Science > QC Physics
Faculty/Division: Faculty of Industrial Sciences And Technology
Depositing User: Prof. Dr. Jose Rajan
Date Deposited: 31 Mar 2015 03:24
Last Modified: 22 Nov 2018 07:09
URI: http://umpir.ump.edu.my/id/eprint/8614
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