Duraisamy, E. and Gurunathan, P. and Das, Himadri T. and Ramesha, K. and Elumalai, P. (2017) [Co(salen)] derived Co/Co3O4 nanoparticle@carbon matrix as highperformance electrode for energy storage applications. Journal of Power Sources, 344. pp. 103-110. ISSN 0378-7753

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Abstract

Cobalt/cobalt oxide nanoparticle-embedded in a carbon matrix was synthesized by one spot pyrolysis of cobalt salen complex [Co(salen)] at 800 �C in an argon atmosphere. The X-ray diffraction studies confirmed the presence of Co and Co3O4 in the carbon matrix. The SEM and TEM observations showed the homogeneous distribution of the Co/Co3O4 grains on the carbon matrix. Cyclic voltammograms and galvanostatic charge-discharge studies done on the CR2032 coin cell confirmed that the Co/Co3O4@- carbon matrix was electrochemically active. A stable specific capacity as high as 1000 mA h g�1 has been observed over 50 charge-discharge cycles at C/5 rate. It is believed that the carbon matrix acted both as a spacer to accommodate volume changes during Li intercalation-deintercalation process and also as conductive network leading to the excellent electrochemical performance of the Co/Co3O4@carbon matrix. Further, supercapacitor studies revealed that a specific capacitance of 615 F g�1 at 1 A g�1 has been exhibited by the Co/Co3O4@carbon matrix electrode in 1 M KOH with high Coulombic efficiency (92%) as well as excellent cycling stability for 5000 cycles.

Item Type:	Article
Uncontrolled Keywords:	Energy storage;Li-ion battery;Supercapacitor;Anode;Cobalt oxide;Power density
Subjects:	Electrochemical Power Sources
Divisions:	UNSPECIFIED
Depositing User:	Dr. N Meyyappan
Date Deposited:	06 May 2019 05:32
Last Modified:	06 May 2019 05:32
URI:	http://cecri.csircentral.net/id/eprint/3212

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