Water management in PEM fuel cells has received extensive attention due to its key role in
fuel cell performance. The unavoidable water, from humidified gas streams and …

Recent advances in visualization technologies are providing new discoveries as well as
answering old questions with respect to the phase structure and flow of hydrogen-rich fluids …

PEM Fuel Cell Diagnostic Tools presents various tools for diagnosing PEM fuel cells and
stacks, including in situ and ex situ diagnostic tools, electrochemical techniques, and …

Progress in renewable energy production has directed interest in advanced developments
of energy storage systems. The all-vanadium redox flow battery (VRFB) is one of the …

We present a study on a new type of flow field channel design for polymer electrolyte
membrane fuel cells (PEMFCs). Small barriers have been implemented into the flow field …

In fuel cell catalyst layers (CLs), the ionomer plays roles as a binder and proton conductor.
The ionomer requires hydration for enabling proton transport; however, the accumulation of …

In this study, the effect of a controlled temperature gradient on water transport across a
single fuel cell was quantitatively investigated using high-resolution neutron imaging. The …

This work is devoted to delineating the fundamentals of evaporative water removal from
diffusion media (DM) to achieve highly efficient and durable gas purge. Multiphase water …

In polymer electrolyte fuel cell systems, a gas purge commonly is applied to remove excess
water and achieve high performance and durability. The porous diffusion media (DM) …

This work presents an in situ study on the water-content measurement in polymer electrolyte
fuel cells (PEFCs) using neutron imaging. The effects of several important operating and …