Modification of Polyaniline/ Nafion content at PEM Fuel Cells gas diffusion electrodes

In this work gas diffusion electrodes were fabricated by Nafion and polyaniline (PANI) nanoparticles. The goal of this work was to find the optimal point for the mixing of Nafion and polyaniline in gas diffusion electrodes. The efficiency of electrodes was examined for oxygen reduction reaction and the electrochemical properties of them were investigated by cyclic voltametry, linear sweep voltametry, chronoampermetry and electrochemical impedance spectroscopy. The surface morphology of electrodes were characterized by scanning electron microscope. Results revealed that electrodes including both Nafion and polyaniline work more efficiently compared to electrodes contaning Nafion and polyaniline slightly, but this mixture has optimum point in which electrode performance is maximum.

Keywords:

Polyaniline nanofiber , Nafion , Nanostructure , Oxygen reduction reaction (ORR) , Proton exchange membrane fuel cell (PEMFC)