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

Ramkumar, R. and Minakshi, M. (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.

Link to Published Version: http://dx.doi.org/10.1039/c5dt00622h
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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.

Publication Type: Journal Article
Murdoch Affiliation: 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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