Elizabeth, Indu and Singh, Bhanu Pratap and Bijoy, Thoyikkottu K and Reddy, Venkata Rami and Karthikeyan, Gunasekaran and Singh, Vidya Nand and Dhakate, Sanjay R. and Murugan, Palanichamy and Gopukumar, Sukumaran (2017) In-situ Conversion of Multiwalled Carbon Nanotubes to Graphene Nanosheets: An Increasing Capacity Anode for Li Ion Batteries. Electrochimica 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 mAg(-1) to 500 mAg(-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 mAg(-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
Additional Information:	Copyright for this article belongs to M/s Elsevier.
Subjects:	Electrochemistry
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	29 Oct 2018 11:22
Last Modified:	29 Oct 2018 11:22
URI:	http://npl.csircentral.net/id/eprint/2750

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