Solvent mobility is an important aspect of fuel cell performance because of electrode flooding and drying. Under electro-osmotic flow, the ratio of the flux of solvent molecules to that of a charged species towards an electrode is known as the electro-osmotic drag coefficient. The effects of variables such as pore radius, crowding, temperature, electric field strength, ion concentration and surface roughness on the mobility of ions and accompanying solvent molecules in an applied electric field are still not well understood. We investigate these factors with coarse-grained simulations using an efficient and accurate model of water and sodium chloride ions, and compare these results with those from experiments.

Assessing the effects of crowding, pore size, and interactions on electro-osmotic drag coefficients

245th National Meeting (2013)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.