Effect of Methanol Crossover in a Liquid‐Feed Polymer‐Electrolyte Direct Methanol Fuel Cell

The performance of a liquid‐feed direct methanol fuel cell employing a proton‐exchange membrane electrolyte with Pt‐Ru/C as anode and Pt/C as cathode is reported. The fuel cell can deliver a power density of ca. 0.2 W/cm 2 at 95°C, sufficient to suggest that the stack construction is well worthwhile. Methanol crossover across the polymer electrolyte at concentrations beyond 2 M methanol affects the performance of the cell which appreciates with increasing operating temperature.