Morphology and electrochemical performance of graphene nanosheet array for Li-ion thin film battery

Thomas, Rajesh and Rao, Yellareswar K and Rao, Mohan G (2013) Morphology and electrochemical performance of graphene nanosheet array for Li-ion thin film battery. In: ELECTROCHIMICA ACTA, 108 . pp. 458-464.

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Abstract

Highly branched and porous graphene nanosheet synthesized over different substrates as anode for Lithium ion thin film battery. These films synthesized by microwave plasma enhanced chemical vapor deposition at temperature 700 degrees C. Scanning electron microscopy and X-ray photo electron spectroscopy are used to characterize the film surface. It is found that the graphene sheets possess a curled and flower like morphology. Electrochemical performances were evaluated in swezelock type cells versus metallic lithium. A reversible capacity of 520 mAh/g, 450 mAh/g and 637 mAh/g was obtained after 50 cycles when current rate at 23 mu A cm(2) for CuGNS, NiGNS and PtGNS electrodes, respectively. Electrochemical properties of thin film anode were measured at different current rate and gave better cycle life and rate capability. These results indicate that the prepared high quality graphene sheets possess excellent electrochemical performances for lithium storage. (C) 2013 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	ELECTROCHIMICA ACTA
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Additional Information:	copyright for this article belongs to PERGAMON-ELSEVIER SCIENCE LTD, ENGLAND
Keywords:	Li ion batteries; Electrodes; Graphene nano sheets; Electrochemical performance; Cycle life
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	08 Jan 2014 06:04
Last Modified:	08 Jan 2014 06:04
URI:	http://eprints.iisc.ac.in/id/eprint/48154

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