Development of a 2 W direct methanol fuel cell power source |
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| Affiliation: | 1. Foundation for Research and Technology-Hellas (FORTH), Institute of Chemical Engineering Sciences (ICE-HT), P.O. Box 1414, GR-26504 Patras, Greece;2. Department of Materials Science, University of Patras, GR-26504 Patras, Greece;3. Fraunhofer Institute for Microengineering and Microsystems IMM, Carl-Zeiss-Str. 18–20, D-55129 Mainz, Germany;1. Department of Chemical Engineering, Faculty of Engineer, Kasetsart University, Bangkok, 10900, Thailand;2. Department of Chemical Engineering, Faculty of Engineer, KMUTNB, Bangkok, 10800, Thailand;3. Research and Development Centre for Chemical Engineering Unit Operation and Catalyst Design, King Mongkut''s University of Technology North Bangkok, Bangkok, 10800, Thailand;4. Department of Industrial Engineering, Faculty of Engineering, Khon Kaen University, Khon Khan, 40000, Thailand;5. NANOTEC Center for Nanoscale Materials Design for Green Nanotechnology and Center for Advanced Studies in Nanotechnology for Chemical, Food and Agricultural Industries, Kasetsart University, Bangkok, 10900, Thailand;6. School of Chemical Engineering and Analytical Science, The University of Manchester, Manchester, M13 9PL, UK;1. Department of Chemical Engineering, Faculty of Engineering, University of Sistan and Baluchestan, Zahedan, Iran;2. Department of Mechanical Engineering, Dokuz Eylul University, Buca, Izmir, Turkey;1. Aalto University, Department of Electrical Engineering and Automation, Finland;2. Aalto University, Department of Energy Technology, Finland;1. Foundation for Research and Technology-Hellas (FORTH), Institute of Chemical Engineering Sciences (ICE-HT), P.O. Box 1414, GR-26504 Patras, Greece;2. Department of Materials Science, University of Patras, GR-26504 Rio Patras, Greece |
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| Abstract: | A series of microfuel cell DMFC prototypes in the 1–2 W range has been developed at Motorola Labs. Design criteria, technical issues and the solution to those issues, system and component performance criteria are all discussed in detail with regards to the demonstrated systems. In particular, the industry-wide problem of long-term voltage degradation is explored with the implementation of a successful engineering solution to this issue which resulted in over 1200 h of system lifetime at the average degradation rate of 41 μV/(h per cell). With sufficient fuel for 1 week of continuous operation, the system energy density in the 2 W DMFC prototype was 490 Wh/kg and 368 Wh/L, respectively, at an overall system efficiency of 20% (includes both fuel conversion and BOP efficiencies). |
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