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
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Official URL: http://iopscience.iop.org/0957-4484/22/29/295202/
Identification Number or DOI: doi:10.1088/0957-4484/22/29/295202
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.
|Item Type:||Article (Commonwealth Reporting Category C)|
|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.|
|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|
|Deposited On:||16 May 2012 17:32|
|Last Modified:||05 Jun 2012 11:58|
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