고분자전해질형 연료전지의 CO₂ 공급에 따른 성능변화 측정

An experimental investigation has been conducted to obtain the effect of O₂ concentration on the performance of PEM fuel cell. The oxygen concentration is an important factor for performance in PEM fuel cell because the fuel cell vehicles use the road air as an oxygen supply. By adding CO₂ gas, which brings undesirable consequences on the performance. we controlled percentage of O₂ gas from the supply air, followed by measuring the voltage. Experimental results show that the output voltage decreased with reducing concentration of O₂ gas. We also conducted theoretical analysis for the effect of O₂ gas concentration, but the value is much lower than the experimental results.