Fabrication of ultra thin CoMoO4 nanosheets modified with chitosan and their improved performance in energy storage device

Ramkumar, R. and Minakshi, M.ORCID: 0000-0001-6558-8317 (2015) Fabrication of ultra thin CoMoO4 nanosheets modified with chitosan and their improved performance in energy storage device. Dalton Transactions, 44 (13). pp. 6158-6168.

Abstract

Ultrathin nanosheet-assembled cobalt molybdate (CoMoO4) with a mesoporous morphology was synthesized by a urea-assisted solution combustion route at a temperature of 400 °C. The as-prepared CoMoO4 was modified using chitosan cross-linked with glutaraldehyde (glu) and employed as a cathode material in an aqueous hybrid capacitor. The physical and electrochemical behaviour of CoMoO4 modified with chitosan and the as-prepared (chitosan free) CoMoO4 has been compared and discussed. The modified CoMoO4 exhibited excellent electrochemical performance with a specific capacitance of 135 F g-1 at 0.6 A g-1 and an energy density of 31 W h kg-1. It also exhibited good cycling stability with high coulombic efficiency over 2000 cycles retaining a specific capacitance of 81 F g-1 at 3 A g-1, comparatively much better than that of nanostructured chitosan free CoMoO4 which yielded 17 F g-1. The results indicated that chitosan gel strongly adheres to the molybdate moiety of CoMoO4 and increases the capacitance four-fold compared to a chitosan free material. The modified CoMoO4 electrode shows potential for high performance, and is an environmentally friendly and low-cost energy storage device.

Item Type:	Journal Article
Murdoch Affiliation(s):	School of Engineering and Information Technology
Publisher:	Royal Society of Chemistry
Copyright:	© The Royal Society of Chemistry 2015.
URI:	http://researchrepository.murdoch.edu.au/id/eprint/26038

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