Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/27371
Title: Electrochemical performance of a graphene-polypyrrole nanocomposite as a supercapacitor electrode
Authors: Bose, S
Kim, NH
Kuila, T
Lau, KT 
Lee, JH
Issue Date: 2011
Publisher: Institute of Physics Publishing
Source: Nanotechnology, 2011, v. 22, no. 29, 295202 How to cite?
Journal: Nanotechnology 
Abstract: A unique nanoarchitecture has been established involving polypyrrole (PPy) and graphene nanosheets by insitu polymerization. The structural aspect of the nanocomposite has been determined by Raman spectroscopy. Atomic force microscopy reveals that the thickness of the synthesized graphene is ∼ 2nm. The dispersion of the nanometer-sized PPy has been demonstrated through transmission electron microscopy and the electrochemical performance of the nanocomposite has been illustrated by cyclic voltammetry measurements. Graphene nanosheet serves as a support material for the electrochemical utilization of PPy and also provides the path for electron transfer. The specific capacitance value of the nanocomposite has been determined to be 267Fg -1 at a scan rate of 100mVs -1 compared to 137mVs -1 for PPy, suggesting the possible use of the nanocomposite as a supercapacitor electrode. After 500 cycles, only 10% decrease in specific capacitance as compared to initial value justifies the improved electrochemical cyclic stability of the nanocomposite.
URI: http://hdl.handle.net/10397/27371
ISSN: 0957-4484
EISSN: 1361-6528
DOI: 10.1088/0957-4484/22/29/295202
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