A high-performance supercapacitor based on polyaniline-nanoporous gold

Title
A high-performance supercapacitor based on polyaniline-nanoporous gold
Authors
변지영김상훈이건우신형준
Issue Date
2019-03
Publisher
Journal of alloys and compounds
Citation
VOL 779-80
Abstract
We prepared and investigated the performance of a supercapacitor prepared by coating polyaniline(PANI) layer on nanoporous gold(NPG) support. NPG was prepared by dealloying Au-Mg alloys with diluted acetic acid that was a simple and environmentally benign process. PANI was electro-deposited on NPG by chrono-potentiometry in perchloric acid. By optimizing the electro-polymerization process, we could prepare uniform and compact PANI layers with 5– 10  nm thickness in and out of the whole NPG surface. We also improved the stability of PANI by using smaller dopant anions for electro-polymerization. Our PANI/NPG supercapacitors had a large areal capacitance of 6.54  mF/cm2, maximum energy density of 9.11  mWh/cm2 at power density of 1.56  W/cm2, fast charge/discharge rates up to 100  mV/s, and better stability than PANI/NPG supercapacitors prepared by sulfuric acid.
URI
http://pubs.kist.re.kr/handle/201004/69136
ISSN
0925-8388
Appears in Collections:
KIST Publication > Article
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