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Optimum content of Nafion ionomer for the fabrication of MEAs in PEMFCs with spray-coated Pt/CNT electrodes

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Abstract

To enhance the performance of a polymer electrolyte membrane fuel cell (PEMFC), a Pt catalyst was supported on carbon nanotubes (CNTs) and the optimum content of Nafion ionomer in the Pt/CNT electrode was examined by cell performance tests, cyclic voltammetry, and electrochemical impedance spectroscopy. The amount of the Pt catalyst supported on the CNTs was 34 wt.%. The Nafion content significantly changed the protonic and electronic conductivities as well as the mass transfer properties. As such, the performance of the cell was highly dependent on the content of Nafion ionomer. The results of the cell performance tests revealed that the optimum content of Nafion ionomer in the Pt/CNT electrode was about 20 wt.%.

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Authors and Affiliations

  1. School of Chemical Engineering & Bioengineering, University of Ulsan, Ulsan, 680-749, Korea

    Seong-Ho Choi, Dong-Won Jung, Eun-Suok Oh & Junbom Kim

  2. School of Materials Science and Engineering, University of Ulsan, Ulsan, 680-749, Korea

    Sung-Ook Yoon & Soon Park

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  1. Seong-Ho Choi
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  2. Dong-Won Jung
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  3. Sung-Ook Yoon
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  4. Soon Park
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  5. Eun-Suok Oh
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  6. Junbom Kim
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Correspondence to Dong-Won Jung.

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Choi, SH., Jung, DW., Yoon, SO. et al. Optimum content of Nafion ionomer for the fabrication of MEAs in PEMFCs with spray-coated Pt/CNT electrodes. Met. Mater. Int. 17, 811–816 (2011). https://doi.org/10.1007/s12540-011-1019-x

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  • DOI: https://doi.org/10.1007/s12540-011-1019-x

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