Characterization of MgCo2O4 as an electrode for high performance supercapacitors. (10th April 2015)

• Record Type: Journal Article
• Authors: Krishnan, Syam G.; Reddy, M.V.; Harilal, Midhun; Vidyadharan, Baiju; Misnon, Izan Izwan; Rahim, Mohd Hasbi Ab; Ismail, Jamil; Jose, Rajan
• Is Part Of: Electrochimica acta. Volume 161(2015)
• Page Start: 312
• Page End: 321
• Publication Date: 2015-04-10
• Subjects: electrochemical energy storage -- pseudocapacitors -- asymmetric capacitors -- lithium ion battery; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2015.02.081
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Metal cobaltites have promising electrochemical properties for their application as an energy storage medium. In this paper, usefulness of MgCo2 O4 as a supercapacitor electrode is demonstrated and compared its performance with two other cobaltites, MnCo2 O4 and CuCo2 O4 . 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 MgCo2 O4 electrodes show superior charge storage properties in 3 M LiOH among a diverse choice of electrolytes. The MgCo2 O4 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.