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Synthesis and performance evaluation of novel cobalt hydroxychlorides for electrochemical supercapacitors

Ranganatha, S and Munichandraiah, N (2017) Synthesis and performance evaluation of novel cobalt hydroxychlorides for electrochemical supercapacitors. In: JOURNAL OF SOLID STATE ELECTROCHEMISTRY, 21 (4). pp. 939-946.

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Official URL: http://dx.doi.org/10.1007/s10008-016-3443-9


Co-2(OH)(3)Cl has been prepared by a facile one pot sol-gel process. Two different solvents, ethylene glycol and glycerol, are used for the synthesis. The resulting samples are studied for their morphology, structure, and electrochemical stability upon cycling. The sample with ethylene glycol as solvent exhibits three-dimensional porous interconnected xerogel morphology, whereas that with glycerol shows a crystalline and non-porous nanoparticulate structure. The specific capacitance of the Co-2(OH)(3)Cl prepared with ethylene glycol is 434 F/g, when the electrodes are cycled in 3 M KOH at a specific current 2 A/g, and with that of glycerol, it is 252 F/g. Interestingly, at a high current density of 25 A/g, Co-2(OH)(3)Cl with ethylene glycol and glycerol showed 143 and 72 F/g, respectively. Ethylene glycol significantly modified the structure and morphology so as to attain a mesoporous Co-2(OH)(3)Cl with high surface area, which in turn influenced its remarkable electrochemical behavior. With a significant specific capacity and electrochemical stability, the synthesized material is a novel potential candidate for supercapacitors.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Depositing User: Id for Latest eprints
Date Deposited: 20 May 2017 05:35
Last Modified: 20 May 2017 05:35
URI: http://eprints.iisc.ac.in/id/eprint/56906

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