Elizabeth, I. and Singh, B.P. and Bijoy, T.K. and Reddy, V.R. and Karthikeyan, G. and Singh, V.N. and Dhakate, S.R. and Murugan, P. and Gopukumar, S. (2017) In-situ Conversion of Multiwalled Carbon Nanotubes to GrapheneNanosheets: An Increasing Capacity Anode for Li Ion Batteries. Electrochim Acta, 231. pp. 255-263. ISSN 0013-4686

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Abstract

A unique in-situ morphology transition from multiwall carbon nanotubes (MWCNT) to graphene nanosheets (GNS) upon Li intercalation results in enormous increase in capacity of SnO2/MWCNT composites anode during cycling. The anode capacity increases from 330 mAhg�1 to 500 mAhg�1 which is more than 50% of its initial capacity when cycled at a current density of 200 mAg�1. Further when the sample is cycled at a high current density of 500 mAg�1 the composite sample shows a stable capacity of 400 mAhg�1 for 100 cycles which is attributed to the complete transition of MWCNT to GNSs as confirmed from the high resolution transmission electron microscope (HRTEM) images. First principles density functional theory calculations have been carried out to validate possibility of this morphological transition upon Li intercalation and the results agree well with the experimental findings.

Item Type:	Article
Uncontrolled Keywords:	Increasing capacity;graphene nanosheets anode;carbon nanotube;Li ion batteries
Subjects:	Lithium batteries Nanotechnology Electrochemical Power Sources
Divisions:	UNSPECIFIED
Depositing User:	Dr. N Meyyappan
Date Deposited:	15 May 2019 09:42
Last Modified:	15 May 2019 09:42
URI:	http://cecri.csircentral.net/id/eprint/3228

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