Rajesh, Rajagopal and Senthil Kumar, S.M. and Abirami, R and Rajasekar, K and Balkis, Ameen Kamaludeen (2016) Synthesis and electrochemical studies of Ta – Graphene nanocomposite film modified platinum electrode. Journal of Electroanalytical Chemistry, 780. pp. 53-59. ISSN 1572-6657

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Abstract

Tantalum/Reduced Graphene Oxide composite is presented in thiswork as an electrodematerial for capacitor application. Reduced graphene oxide material was synthesized by modified Hummer's method and Tantalum doped graphene oxide electrodes are fabricated by an electrophoretic deposition method. The physico-chemical properties of the as-synthesized materials are characterized by X-ray diffraction, N2 sorption analyses, Fourier TransformInfrared and Raman spectroscopic techniques. The structural details are elucidated fromthe scanning and transmission electronmicroscopic analyses. The X-ray diffraction results confirmed the structural integrity of graphene after the Ta doping process. Raman analysis confirmed the graphitic nature of graphene with a surface area of 281m2/g. The surface area of the tantalum doped composite decreased to 214m2/g due to the deposition of Ta ions onto the graphene surface. The Ta doped graphene composite exhibited comparatively higher capacitance value of 1420 μF/cm2 than graphene (980 μF/cm2), indicating that this composite can storemore charge in comparisonwith graphene. This enhancement of capacitance with Ta doped graphene is thus found to be a good candidate for super/ultra capacitor applications

Item Type:	Article
Uncontrolled Keywords:	Graphene; Graphene/Ta composite; Supercapacitor; Areal capacitance
Subjects:	Electroinorganic Electroorganic
Divisions:	UNSPECIFIED
Depositing User:	Dr. N Meyyappan
Date Deposited:	07 Aug 2017 06:48
Last Modified:	07 Aug 2017 06:48
URI:	http://cecri.csircentral.net/id/eprint/3167

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