Park, SY Lee, JW Jang, SH Kim, LH Choi, DK Joe, YI 2024-01-21T15:03:03Z 2024-01-21T15:03:03Z 2021-09-05 1999-10 0378-7753 https://pubs.kist.re.kr/handle/201004/141895 The transport of sodium ions through a sulfonated polysulfone (SPSF) cation-exchange membrane coated on a rotating disc electrode is investigated by means of cyclic voltammetry (CV) and a.c. impedance spectroscopy. Impedance plots are analyzed by a non-linear least-squares fitting method. The transport (diffusion coefficient), interfacial parameters (double layer capacitance), and total resistance of the SPSF membrane coated electrodes are investigated as the function of sulfonic acid group concentration in the SPSF membrane, membrane thickness, electrolyte concentration, and reduction potential. The diffusion coefficients are found to vary between 1.082 x 10(-12) and 1.136 x 10(-11) cm(2) s(-1) as the sulfonic acid group concentration is increased from 0.672 to 1.18 mmol/g membrane at open circuit voltage. The double-layer capacitance depends on electrolyte concentration and reduction potential, and sulfonic acid group concentration, but not on the membrane thickness. The total resistance depends on sulfonic acid group concentration, electrolyte concentration, membrane thickness, and reduction potential. (C) 1999 Elsevier Science S.A. All rights reserved. English ELSEVIER SCIENCE SA Impedance characteristics of a rotating disc electrode coated with a sulfonated polysulfone cation-exchange membrane Article 10.1016/S0378-7753(99)00305-5 1 JOURNAL OF POWER SOURCES, v.83, no.1-2, pp.217 - 222 JOURNAL OF POWER SOURCES 83 1-2 217 222 N scie scopus 000083640500029 2-s2.0-0345374569 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Article ELECTROCHEMICAL-BEHAVIOR NAFION FILMS POLYPYRROLE DIFFUSION a.c. impedance spectroscopy cyclic voltammetry diffusion coefficient double layer capacitance