Abstract
Hydrogen starvation detection is one of key technologies to prevent fuel cell degradation, and electrochemical impedance spectroscopy (EIS) is powerful tool for it. In general, EIS can measure average electrochemical state inside a stack, and measured impedance is easily affected by electrochemical reaction distribution. So, it is necessary to understand relationship between measured impedance and reaction distribution in order to detect local hydrogen starvation caused by complex transport phenomena. For this purpose, real time impedance measurement was conducted by using a short stack with segmented cell. The results suggested developed impedance system had future possibility to detect local fuel starvation.
