File Download

There are no files associated with this item.

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)
Related Researcher

RuoffRodney Scott

Ruoff, Rodney S.
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

Preparation of Supercapacitor Electrodes through Selection of Graphene Surface Functionalities

Author(s)
Lai, LinfeiYang, HuanpingWang, LiangTeh, Boon KinZhong, JianqiangChou, HarryChen, LuweiChen, WeiShen, ZexiangRuoff, Rodney S.Lin, Jianyi
Issued Date
2012-07
DOI
10.1021/nn3008096
URI
https://scholarworks.unist.ac.kr/handle/201301/54247
Fulltext
https://pubs.acs.org/doi/10.1021/nn3008096
Citation
ACS NANO, v.6, no.7, pp.5941 - 5951
Abstract
In order to investigate the effect of graphene surface chemistry on the electrochemical performance of graphene/polyaniline composites as supercapacitor electrodes, graphene oxide (G-O), chemically reduced G-O (RG-O), nitrogen-doped RG-O (N-RG-O), and amine-modified RG-O (NH2-RG-O) were selected as carriers and loaded with about 9 wt % of polyaniline (PANi). The surface chemistry of these materials was analyzed by FTIR, NEXAFS, and XPS, and the type of surface chemistry was found to be important for growth of PANi that influences the magnitude of increase of specific capacitance. The NH2-RG-O/PANi composite exhibited the largest increase in capacitance with a value as high as 500 F g(-1) and good cyclability with no loss of capacitance over 680 cycles, much better than that of RG-O/PANi, N-RG-O/PANi, and G-O/PANi when measured in a three-electrode system. A NH2-RG-O/PANWN-RG-O supercapacitor cell has a capacitance of 79 F g(-1), and the corresponding specific capacitance for NH2-RG-O/PANi is 395 F g(-1). This research highlights the importance of introducing -NH2 to RG-O to achieve highly stable cycling performance and high capacitance values.
Publisher
AMER CHEMICAL SOC
ISSN
1936-0851
Keyword (Author)
supercapacitor electrodesgraphenesurface functionalities
Keyword
DOUBLE-LAYER CAPACITANCECONDUCTING POLYMERSCARBON MATERIALSOXIDECOMPOSITEREDUCTIONCHEMISTRYBEHAVIORSHEETSENERGY

qrcode

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.