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

被引：123

作者：

Bose, Saswata ^{[1
]}

Kim, Nam Hoon ^{[2
]}

Kuila, Tapas ^{[1
]}

Lau, Kin-tak ^{[1
,3
,4
]}

Lee, Joong Hee ^{[1
,2
,5
]}

机构：

[1] Chonbuk Natl Univ, WCU Program, Dept BIN Fus Technol, Jeonju 561756, Jeonbuk, South Korea

[2] Chonbuk Natl Univ, Dept Hydrogen & Fuel Cell Engn, Jeonju 561756, Jeonbuk, South Korea

[3] Univ So Queensland, Ctr Excellence Engn Fibre Composites, Fac Engn & Surveying, Toowoomba, Qld 4350, Australia

[4] Hong Kong Polytech Univ, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China

[5] Chonbuk Natl Univ, Dept Polymer & Nano Engn, Jeonju 561756, Jeonbuk, South Korea

来源：

NANOTECHNOLOGY | 2011年 / 22卷 / 29期

基金：

新加坡国家研究基金会;

关键词：

CARBON NANOTUBE COMPOSITES; EXFOLIATED GRAPHITE OXIDE; ELECTRICAL-PROPERTIES; AQUEOUS DISPERSIONS; CAPACITANCE; NANOSHEETS; FILMS; MICROSTRUCTURE; POLYMERIZATION; CONDUCTIVITY;

D O I：

10.1088/0957-4484/22/29/295202

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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 similar to 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.

引用

页数：9

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