Influence of diffusion layer ink preparation techniques on the microstructure and performance of cathode in proton exchange membrane fuel cell

In this study, effects of cathode gas diffusion layer inks preparation procedures on the performance of small scale Proton exchange membrane fuel cell (PEMFC) have been investigated. An aspect that has not been reported in detail elsewhere. Properties of diffusion layers have been studied by Physical and electrochemical techniques. Homogeneity of the inks supplied following three methods based on ultrasonic waves: pulse ultrasonic, continues ultrasonic and bath ultrasonic technique. MEAs showed dominant different performances at three regions of polarization especially in mass transport activity due to various permeability caused by variety of particle size distributions. Results showed that bath ultrasonic treatment is an effective procedure which achieves more ink homogeneity and consequently cell performance improvement

کلیدواژه ها:

Diffusion layer ، ultrasonic waves ، mass transport