Optimization of properties and operating parameters of a passive DMFC mini-stack at ambient temperature |
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Authors: | V. Baglio, A. Stassi, F.V. Matera, A. Di Blasi, V. Antonucci,A.S. Aric |
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Affiliation: | aCNR-ITAE, Via Salita S. Lucia sopra Contesse 5, 98126 Messina, Italy |
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Abstract: | An investigation of properties and operating parameters of a passive DMFC monopolar mini-stack, such as catalyst loading and methanol concentration, was carried out. From this analysis, it was derived that a proper Pt loading is necessary to achieve the best compromise between electrode thickness and number of catalytic sites for the anode and cathode reactions to occur at suitable rates. Methanol concentrations ranging from 1 M up to 10 M and an air-breathing operation mode were investigated. A maximum power of 225 mW was obtained at ambient conditions for a three-cell stack, with an active single cell area of 4 cm2, corresponding to a power density of about 20 mW cm−2. |
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Keywords: | Direct methanol fuel cells Monopolar stack Passive operation Air breathing Ambient temperature |
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