Electrochemical performance of a graphene–polypyrrole nanocomposite as a supercapacitor electrode

Bose, Saswata and Kim, Nam Hoon and Kuila, Tapas and Lau, Kin-tak and Lee, Joong Hee (2011) Electrochemical performance of a graphene–polypyrrole nanocomposite as a supercapacitor electrode. Nanotechnology, 22 (29). p. 5202. ISSN 0957-4484

Abstract

A unique nanoarchitecture has been established involving polypyrrole (PPy) and graphene nanosheets by in situ 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 ~ 2 nm. 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 267 F g − 1 at a scan rate of 100 mV s − 1 compared to 137 mV s − 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.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to published version due to publisher copyright policy. A Corrigendum for this article has been published in 2011 Nanotechnology 22(36) Sep 2011.
Depositing User: epEditor USQ
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - No Department
Date Deposited: 16 May 2012 07:32
Last Modified: 27 Aug 2014 00:15
Uncontrolled Keywords: cyclic stability; electrochemical performance; electron transfer; in-situ polymerization; initial values; nano-architecture; scan rates; specific capacitance; structural aspects; supercapacitor electrodes; support materials; voltammetry measurements
Fields of Research (FOR2008): 09 Engineering > 0906 Electrical and Electronic Engineering > 090603 Industrial Electronics
03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030305 Polymerisation Mechanisms
10 Technology > 1007 Nanotechnology > 100708 Nanomaterials
Socio-Economic Objective (SEO2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: 10.1088/0957-4484/22/29/295202
URI: http://eprints.usq.edu.au/id/eprint/20963

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