Title

APPLICATION OF ELECTROPHORETIC DEPOSITION FOR SOLID OXIDE FUEL CELL

Conference Dates

October 1-6, 2017

Abstract

There has been much attention for solid oxide fuel cells (SOFCs) composed of ceramic materials in the main part which are efficient power generation devices with low pollutant emissions. A recent trend in development of the SOFCs is to low the operating temperature below about 600oC with the objective of using metallic materials as interconnects. Low-temperature operating SOFCs (LT-SOFCs) have, however, required film body for the electrolyte and controlled microstructure for the electrodes, especially cathode, because the reduced-temperature operation often causes degraded cell performance due to increases in ohmic and polarization losses.

As for the electrolyte, although various film-formation methods have been applied, it is important to develop cost-effective processes for broad commercialization of LT-SOFCs. Electrophoretic deposition (EPD) is a promising process for LT-SOFCs with various shapes including tubular cell, because EPD enables us to form ceramic films even on uneven substrates. Our research group has succeeded in fabricating ca. 5 micrometer thick dense ceramic films of yttria-stabilized zirconia (YSZ) on NiO-YSZ porous substrates using

EPD based upon electrophoretic filtration, obtaining maximum output power densities over 0.35 W/cm2 at 600oC and 2.00 W/cm2 at 800oC (see in Fig. 1). Thus, EPD was clearly effective to fabrication of dense thin electrolyte films applicable to LT-SOFCs.

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Additional Files
12 - Motohide Matsuda.pdf (197 kB)

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