Low Temperature Performance Improvement of SOFC with Thin Film Electrolyte and Electrodes Fabricated by Pulsed Laser Deposition

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Abstract
The performance of solid oxide fuel cells (SOFCs) with thin film electrolytes and electrodes was investigated at a lower operating temperature regime (T≤600°C)(T≤600°C) . 2×2cm2×2cm anode-supported unit cells with thin film components of a Ni–yttria-stabilized zirconia (YSZ) composite anode interlayer, a thin (≤1μm)(≤1μm) YSZ electrolyte, and a lanthanum strontium cobalt oxide cathode were fabricated by using pulsed laser deposition, and the performance of the cells was characterized at the temperature range of 350°C≤T≤600°C350°C≤T≤600°C . Stable open-circuit voltage values above 1 V were successfully obtained with thin film electrolyte cells, which implied that the 1μm1μm thick electrolyte was fairly dense and gastight. The thin film electrolyte cells exhibited a much more improved cell performance than a thick film (∼8μm)(∼8μm) YSZ electrolyte cell at the low operating temperature regime (350–550°C)(350–550°C) and, in some cases, showed better power outputs than other thin film membrane micro-SOFCs.

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