Kim, DJ Cho, EA Hong, SA Oh, IH Ha, HY 2024-01-21T07:06:01Z 2024-01-21T07:06:01Z 2021-09-02 2004-05-03 0378-7753 https://pubs.kist.re.kr/handle/201004/137589 This paper describes recent advances in passive direct methanol fuel cells (DMFCs) at the Korea Institute of Science and Technology (KIST). At KIST, we have been developing passive micro-DMFCs with capacities under 5 W that are expected to be used as portable power sources. Research activities are focused on development of membrane-electrode assemblies (MEAs) and design of monopolar stacks operating under passive and air-breathing conditions. The passive cells showed many unique features, much different from the active ones. Single cells with active area of 6 cm(2) showed a maximum power density of 40 mW/cm(2) at 4 M of methanol concentration at room temperature. A six-cell stack having a total active area of 27 cm(2) was constructed in a monopolar configuration and it produced a power output of 1000 mW (37 mW/cm(2)). Effects of experimental parameters on the performance were also examined to investigate the operation characteristics of single cells and monopoiar stacks. Application of micro-DMFCs as portable power sources were demonstrated using small toys and display panels powered by the passive monopolar stacks. (C) 2004 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV PERFORMANCE MEMBRANES Recent progress in passive direct methanol fuel cells at KIST Article 10.1016/j.jpowsour.2003.12.023 1 JOURNAL OF POWER SOURCES, v.130, no.1-2, pp.172 - 177 JOURNAL OF POWER SOURCES 130 1-2 172 177 scie scopus 000221005800022 2-s2.0-1842421827 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Article PERFORMANCE MEMBRANES passive DMFC air-breathing DMFC monopolar stack portable power sources MEA