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    Patterned Silver Nanomesh Cathode for Low-Temperature Solid Oxide Fuel Cells

    Year: 2012

    Journal: J. Electrochem. Soc., 2012, 159 (5), B541-B545, 20131009

    Authors: Joon Hyung Shim, Young Beom Kim, Joong Sun Park, Jihwan An, Turgut M. Gür, Fritz B. Prinz

    Organizations: Department of Mechanical Engineering, Korea University, Seoul 136-713, Korea; Department of Mechanical Engineering, Hanyang University, Seoul 133–791, Korea; Department of Mechanical Engineering and Stanford University, Stanford, California 94305, USA; Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA

    We have tested 70 nm thick patterned dense silver mesh with close-packed nano-sized holes as catalytic air cathode for low temperature solid oxide fuel cells. The perforated bulk silver nano-mesh structure was fabricated by nanosphere lithography (NSL) technique using the Langmuir-Blodgett trough, and the pore opening size was 500∼600 nm. Fuel cell tests were conducted using nano-mesh silver cathodes on commercial 100 μm-thick 8% yttria stabilized zirconia electrolytes with sputtered porous platinum anodes. The performance of the cells was measured at temperatures of 475∼550 K by examining the current-voltage curves, maximum power densities, and impedance spectra using electrochemical impedance spectroscopy. We observed that nano-mesh silver cathodes outperformed both nano-mesh platinum and randomly sputtered porous silver, and exhibited improved thermal stability.