Differential capacity plot as a tool for determination of electroactive surface area within a PEMFC stack

摘要: Voltammetric techniques are usually employed for characterization of PEM single cells in terms fuel crossover and electrochemical active surface. These are, however, no more valid individual the forming a stack. Previous works suggested use chronopotentiometric measurements with current pulses: various interpretations curves can be used cells, with, different accuracy levels determination two above cell features. The present manuscript establishes comparison voltammetric potentiometric three same grade, then were carried out stack formed by cells. Interpretation conducted differential capacity plots was shown to lead accurate features as indicated agreement between data obtained