Performance evaluation of passive DMFC single cells |
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| Affiliation: | 1. Department of Chemistry, Dr. Bhupendranath Dutta Smriti Mahavidyalaya, Burdwan 713407, West Bengal;2. Department of Chemistry, Burdwan University, Golapbag, Burdwan 713104, West Bengal;3. Bio-Organic Division, Bhabha Atomic Research Centre, Mumbai 400085, India;1. School of Engineering and Applied Sciences, United States;2. Francis Bitter Magnet Lab, Department of Chemistry, MIT, United States;3. Department of Chemistry, Aarhus University, Denmark;4. School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, United States;1. II. Medizinische Klinik und Poliklinik, Klinikum rechts der Isar der Technischen Universität München, Ismaninger Straße 22, 81675 München, Germany;2. Institut für diagnostische und interventionelle Radiologie, Klinikum rechts der Isar der Technischen Universität München, Ismaninger Straße 22, 81675 München, Germany;3. Chirurgische Abteilung, Kreisklinik Wolfratshausen, Moosbauerweg 5, 82515 Wolfratshausen, Germany;1. PG and Research Department of Chemistry, Polymeric Materials Research Lab, Alagappa Government Arts College, Karaikudi 630 003, Tamil Nadu, India;2. Technische Universität München – Campus for Research Excellence and Technological Enterprise, 1 CREATE Way, Singapore 138602, Singapore |
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| Abstract: | Passive direct methanol fuel cells have been extensively investigated for the effects of methanol concentration, catalyst loading of electrodes, fuel and oxidant supply modes and long-term operation on their performance. Passive cells to which the reactants, methanol and air, are supplied by natural convection flow without the help of any external devices, have shown very different behavior compared with an actively supplied cell. The optimum methanol concentration and catalyst loading in a passive cell are much higher than those of an active cell. The highest single cell performance was 45 mW cm−2 with a 5 M methanol feed at room temperature and ambient pressure. Forced air to a passive cell was found to have a negative effect on the performance. In addition, experiments have been conducted to find the parameters that affect the long-term operation of a passive cell. |
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