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반응가스 분압에 따른 박막 프로톤 전도성 고체산화물 연료전지의 구동 특성 분석 연구
배기호(Kiho Bae),장동영(Dong Young Jang),네오 케 체안(Ke Chean Neoh),구준모(Junmo Koo),박석원(Suk Won Park),손지원(Ji-Won Son),심준형(Joon Hyung Shim) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
According to partial pressure of reactant gases, electrochemical performance variation of thin film-protonic ceramic fuel cells (PCFCs) is investigated during fuel cell operation. Concentrations of hydrogen and air are changed from 100% to 50% at the anode and cathode sides, respectively, by controlling flow rates with nitrogen valance. Fuel cell performances were collected each partial pressure conditions at an operating temperature of 600 ℃. Ohmic and polarization resistances were estimated through electrochemical impedance spectroscopy analysis. From the performance comparison, a noticeable result is identified that PCFCs strongly depend on hydrogen partial pressure rather than oxygen partial pressure on it, which is opposite trend of the conventional solid oxide fuel cells.