Ionomer Transport Properties Using Interdigitated and Microelectrodes

Transport through the ionomer as both a membrane and in catalyst layer is critical for efficient fuel-cell operation. To gain this understanding, we explore behavior of gas, water, ion transport membranes thin films using novel microelectrode interdigitated electrodes. In work, several common (including PFSA AEM chemistries) are evaluated custom cell to determine mass parameters hydrogen oxygen gas. These determined function water content temperature. Numerical fitting current transient used separate diffusivity solubility from single chronoamperometry experiment. addition, electro-osmotic coefficients these Finally, proton conductivities thick reported temperature humidity Together, gas parameters, coefficients, present more complete picture properties, allowing an enhanced understanding limiting factors performance.