Abstract
Microporous layer (MPL) has a dramatic effect on the durability and water management of polymer electrolyte fuel cell (PEFC). In this paper, the visualization and quantitative analysis of the liquid droplet behavior at the GDL/channel and MPL/GDL interfaces of an operating fuel cell were performed using a digital microscope, and the effect of MPL addition on the liquid water transport in the cathode electrode was investigated. It was found that the MPL addition effectively suppresses the liquid water accumulation at the cathode CL/GDL interface.
