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Fabrication of Pt, Pt–Cu, and Pt–Sn nanofibers for direct ethanol protonic ceramic fuel cell application

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Abstract

Poly(vinyl pyrrolidone) with a M w of 1.3 × 106 g/mol (PVP) or 4 × 104 g/mol (PVPLow) was used as a polymer to fabricate PVP–Pt, PVP–Pt–Cu, and PVPLow–Pt–Sn composite fibers by electrospinning. The effect of varying the electrospinning conditions on the fiber morphology was investigated, and the solution composition and electrospinning parameters were optimized to obtain composite fibers with a minimal bead formation. Pt, Pt–Cu, and Pt–Sn metal nanofibers were then obtained by heat treatment of the respective PVP–metal or PVPLow–metal composite fibers at 300, 350, and 450 °C, respectively, in air for 5 h. Single cells of a direct ethanol protonic ceramic fuel cell were subsequently fabricated by applying the metal nanofibers, or a commercial Pt paste, as the anode on the surfaces of BaY0.2Zr0.8O3−δ pellets and Pt paste as the cathode. The I–V polarization results showed that the metal nanofiber-based anode single cells provided higher maximum power densities than that of the Pt paste anode, with the Pt nanofiber-based anode single cell producing the highest maximum power density of 0.58 mW/cm2 at 550 °C.

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Acknowledgements

The authors would like to thank Asst. Prof. Dr. Thanakorn Wasanapianpong for his assistance on the processing equipment; Wirapong Kornpanom, Thanakorn Tepamart and Boonleau Ngaotawornchai for the XRD, SEM and TEM analysis; Mana Rodchome, Dr. Sumittra Charojrochkul and Pranuda Jivaganont (National Metal and Materials Technology Center) for the help with the cold isostatic pressing equipment, fuel cell test station and high temperature furnace; and Dr. Robert Butcher for the suggestion on the manuscript preparation. The authors acknowledge the financial support from the Research, Development and Engineering (RD&E) fund through The National Nanotechnology Center (NANOTEC), The National Science and Technology Development Agency (NSTDA), Thailand (Project No. P-11-00984) to Chulalongkorn University.

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Authors and Affiliations

  1. National Nanotechnology Center, National Science and Technology Development Agency, Pathum Thani, 12120, Thailand

    Wittaya Yaipimai

  2. Research Unit of Advanced Ceramics, Department of Materials Science, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand

    Rojana Pornprasertsuk

  3. Center of Excellence on Petrochemical and Materials Technology, Chulalongkorn University, Bangkok, 10330, Thailand

    Rojana Pornprasertsuk

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  1. Wittaya Yaipimai
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  2. Rojana Pornprasertsuk
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Correspondence to Rojana Pornprasertsuk.

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Yaipimai, W., Pornprasertsuk, R. Fabrication of Pt, Pt–Cu, and Pt–Sn nanofibers for direct ethanol protonic ceramic fuel cell application. J Mater Sci 48, 4059–4072 (2013). https://doi.org/10.1007/s10853-013-7218-8

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  • DOI: https://doi.org/10.1007/s10853-013-7218-8

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