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 ...
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.