NiO-CNT composite for high performance supercapacitor electrode and oxygen evolution reaction

Roy, Atanu and Ray, Apurba and Saha, Samik and Ghosh, Monalisa and Das, Trisha and Satpati, Biswarup and Nandi, Mahasweta and Das, S (2018) NiO-CNT composite for high performance supercapacitor electrode and oxygen evolution reaction. In: ELECTROCHIMICA ACTA, 283 . pp. 327-337.

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Abstract

Nickel-oxide-Carbon nanotube (NiO-CNT) composite has been synthesized and its multifunctional electrochemical properties have been demonstrated by investigating the supercapacitive performance and the oxygen evolution reactivity. The composite exhibits interlinked porous structure and offers high surface area which has been observed by X-ray diffraction, Field emission scanning electron microscopy, Transmission electron microscopy and Brunauer-Emmett-Teller surface area analysis. NiO-CNT composite offers a specific capacitance of 878.19 F g(-1) at a scan rate of 2 mV s(-1) along with high cyclic stability. Asymmetric supercapacitor has been fabricated with the composite material as positive electrode and activated carbon as negative electrode and 1 M Na2SO4 electrolyte medium. The device offers a specific capacitance of 197.7 F g(-1) at a scan rate of 2 mV s(-1). It exhibits specific energy and specific power 85.7 Wh kg(-1) and 11.2 kWkg(-1), respectively. The device is capable of powering LED and DC motor for several minutes. Moreover, NiO-CNT composite shows excellent activity as a catalyst for Oxygen Evolution Reaction. The composite offers an overpotential of 0.301 V. The material shows excellent long term performance. This multifunctional composite material is a promising candidate for future applications in energy storage and conversion. (C) 2018 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	ELECTROCHIMICA ACTA
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Additional Information:	Copy right for this article belong to PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	04 Sep 2018 15:49
Last Modified:	05 Mar 2019 06:53
URI:	http://eprints.iisc.ac.in/id/eprint/60576

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