Surface-modified Nafion membrane by oleylamine-stabilized Pd nanoparticles for DMFC applications |
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Authors: | Ai Hua Tian Ji-Young Kim Jin Yi Shi Keon Kim Kwangyeol Lee |
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Affiliation: | 1. Department of Chemistry, Korea University, Seoul 136-701, South Korea;2. Jilin Institute of Chemical Technology, Jilin 132022, China |
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Abstract: | The surface of Nafion was modified by applying palladium nanoparticles as methanol barrier materials to decrease methanol crossover and improve the performance of fuel cells. The properties of the Pd-modified membrane, in terms of conductivity, methanol permeability, percentage of liquid uptake as well as the performance of its membrane electrode assembly (MEA) in the direct methanol fuel cell, were analyzed and compared with those using bare Nafion. The modified membrane showed considerable improvement on reducing methanol loss without decreasing proton conductivity. The DMFC performance of modified membrane was superior to that of bare Nafion both at a typical fuel state of 2 M and at high concentration of 5 M, implying that the palladium-modified Nafion can be a good alternative approach for DMFC applications. |
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Keywords: | Palladium Modified Nafion Direct methanol fuel cell Methanol crossover |
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