Lee, Keon-U Byun, Ji Young Shin, Hyung-Joon Kim, Sang Hoon 2024-01-19T20:31:35Z 2024-01-19T20:31:35Z 2021-09-02 2019-03-30 0925-8388 https://pubs.kist.re.kr/handle/201004/120188 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/cm(2), maximum energy density of 9.11 mWh/cm(2) at power density of 1.56 W/cm(2), fast charge/ discharge rates up to 100 mV/s, and better stability than PANI/NPG supercapacitors prepared by sulfuric acid. (C) 2018 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE SA MICRO-SUPERCAPACITORS THIN-FILMS SILVER POLYMERIZATION FABRICATION CAPACITANCE ELECTRODES CATALYSTS BEHAVIOR ANILINE A high-performance supercapacitor based on polyaniline-nanoporous gold Article 10.1016/j.jallcom.2018.11.022 1 JOURNAL OF ALLOYS AND COMPOUNDS, v.779, pp.74 - 80 JOURNAL OF ALLOYS AND COMPOUNDS 779 74 80 scie scopus 000457154700010 2-s2.0-85056807911 Chemistry, Physical Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Chemistry Materials Science Metallurgy & Metallurgical Engineering Article MICRO-SUPERCAPACITORS THIN-FILMS SILVER POLYMERIZATION FABRICATION CAPACITANCE ELECTRODES CATALYSTS BEHAVIOR ANILINE Nanoporous gold Supercapacitor Polyaniline Perchloric acid