Kim, JH Ha, HY Oh, IH Hong, SA Lee, HI 2024-01-21T06:31:30Z 2024-01-21T06:31:30Z 2021-09-05 2004-09-03 0378-7753 https://pubs.kist.re.kr/handle/201004/137237 An optimal preparation method of electrodes has been sought to improve the performance of direct methanol fuel cell (DMFC). The electrodes were prepared with solvents of various polarities in catalyst ink and their single-cell performances were evaluated. A new equivalent circuit of methanol oxidation in DMFC anode has been introduced to find the origin of the difference in the anode performances. The performance of a single cell was high when less polar solvent was employed in catalyst ink. This has been attributed to the decrease in solubility of the ionomer (proton conductor) leading to the formation of a larger agglomerate with catalyst. Consequently, improved proton paths could decrease the pore electrolyte resistance in the catalyst layer. In addition, the secondary pores between those agglomerates became larger to make mass transfer process more facile. (C) 2004 Elsevier B.V. All rights reserved. English ELSEVIER GAS-DIFFUSION ELECTRODES IMPEDANCE CARBON MECHANISM MEMBRANE LAYER Influence of the solvent in anode catalyst ink on the performance of a direct methanol fuel cell Article 10.1016/j.jpowsour.2004.03.058 1 JOURNAL OF POWER SOURCES, v.135, no.1-2, pp.29 - 35 JOURNAL OF POWER SOURCES 135 1-2 29 35 scie scopus 000223964400005 2-s2.0-4243167771 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Article GAS-DIFFUSION ELECTRODES IMPEDANCE CARBON MECHANISM MEMBRANE LAYER direct methanol fuel cell (DMFC) catalyst ink impedance analysis pore electrolyte resistance equivalent circuit conditioning