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(서울대학교) (서울대학교) (서울대학교)
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대한기계학회 대한기계학회 춘추학술대회 대한기계학회 2014년도 추계학술대회
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    초록·키워드

    Thin-film solid oxide fuel cells were fabricated with Ni-Ce<SUB>0.8</SUB>Gd<SUB>0.2</SUB>O<SUB>2-δ</SUB> (Ni-GDC) anode, 8 mol% Yttria-stabilized zirconia electrolyte and platinum cathode. All layers were deposited by radio-frequency (RF) and direct current (DC) sputtering. Ultra-thin platinum functional layer was characterized by DC sputtering for few seconds between the Ni-GDC anode and YSZ electrolyte. Ohmic area-specific resistance (ASR) was 6.219 Ωcm² for pure Ni-GDC anode. With only a few nanometers of extremely thin platinum functional layer, ohmic ASR was dramatically reduced into 1.407 Ωcm². Cell performance was also significantly increased by 55 %. However, further deposition of functional layer on the anode caused the performance decrease, which was originated from the anode-electrolyte blocking effect by the platinum layer. Mixed ionic and electronic conductor (MIEC) anode lost the ionic conductive path for triple-phase boundary (TPB) extension.

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