Kim, JH Ha, HY Oh, IH Hong, SA Kim, HN Lee, HI 2024-01-21T06:05:23Z 2024-01-21T06:05:23Z 2021-09-05 2004-11-30 0013-4686 https://pubs.kist.re.kr/handle/201004/137039 Electrochemical techniques such as ac impedance analysis and cyclic voltammetry have been employed to investigate the effect of ionomer content in the anode on the performance of direct methanol fuel cells. Two different types of catalysts, black and supported catalysts, were used to compare the effect of catalyst morphology on the electrochemical properties of the electrodes. Electrochemical surface areas that were measured with complete cells using cyclic voltammetry increased with increasing ionomer content for the MEAs with supported catalyst, but varied with a maximum value for the MEAs with black catalyst. Charge transfer resistance in the anode that was measured using an impedance analysis also increased with an increase in ionomer content, but it showed a minimum value at an ionomer content which was dependent on the type of catalysts used in the MEAs. (C) 2004 Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD GAS-DIFFUSION ELECTRODES CATALYST LAYER FUEL-CELLS IMPEDANCE Electrochemical studies of DMFC anodes with different ionomer content Article 10.1016/j.electacta.2004.02.069 1 ELECTROCHIMICA ACTA, v.50, no.2-3, pp.801 - 806 ELECTROCHIMICA ACTA 50 2-3 801 806 scie scopus 000225261000103 2-s2.0-9344227931 Electrochemistry Electrochemistry Article; Proceedings Paper GAS-DIFFUSION ELECTRODES CATALYST LAYER FUEL-CELLS IMPEDANCE direct methanol fuel cell ionomer content cyclic voltammetry impedance MEA