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Synthesis of Hierarchical Cobalt Phosphate Nanoflakes and Their Enhanced Electrochemical Performances for Supercapacitor Applications

Author(s)
Theerthagiri, JayaramanThiagarajan, KannadasanSenthilkumar, BaskarKhan, ZiyauddinSenthil, Raja ArumagamArunachalam, PrabhakarnMadhavan, JagannathanAshokkumar, Muthupandian
Issued Date
2017-01
DOI
10.1002/slct.201601628
URI
https://scholarworks.unist.ac.kr/handle/201301/21824
Fulltext
http://onlinelibrary.wiley.com/doi/10.1002/slct.201601628/abstract
Citation
CHEMISTRYSELECT, v.2, no.1, pp.201 - 210
Abstract
Hierarchical structured cobalt phosphate (Co-3(PO4)(2)) nanoflakes were synthesized by simple co-precipitation method and employed as electrodes for supercapacitor. The purity and phase formation of the synthesized (Co-3(PO4)(2)) nanoflakes were ascertained by XRD and XPS measurements. The surface morphology and elemental composition of the Co-3(PO4)(2) nanoflakes were observed by using FE-SEM, TEM and EDS. The electrochemical behaviour of the present material as an anode material for supercapacitor was explored by cyclic voltammetric measurements and galvanostatic charge-discharge analysis. The specific capacitance for the as-synthesized and calcined (Co-3(PO4)(2)) nanoflakes electrodes was 132 and 210 Fg(-1) at a scan rate of 10 mV s(-1). The enhanced electrochemical behaviour of the calcined Co-3(PO4)(2) nanoflakes might be due to its well crystalline nature which offers more active sites for faradaic reactions, good conductivity and rapid diffusion of the electrolyte ions. The fabricated Co-3(PO4)(2) electrode displayed an excellent cyclic stability with 95% retention of initial specific capacitance after 800 cycles. An enhanced effect on the electrochemical properties of the Co-3(PO4)(2) nanoflakes has been proposed.
Publisher
WILEY-V C H VERLAG GMBH
ISSN
2365-6549
Keyword (Author)
aqueous electrolytecapacitancecobalt phosphateco-precipitationsupercapacitor
Keyword
ELECTRODEFACILE

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