(242c) Ion-Selective Membranes in Electrochemical Separations

Ion-selective membranes are ubiquitous in electrochemical separations for energy, water, and environmental applications, e.g., fuel cell, electrolyzer, electrodialysis desalination, and heavy metals removal. Selectivity of the membranes is principal to the efficiency and effectiveness of the electrochemical separations. This talk will discuss the five different types of selectivity, namely charge, valence, specific ion, ion/solvent, and ion/uncharged solute selectivities. Recent work from our group in advancing charge selectivity, valence selectivity, and specific ion selectivity will be presented. More broadly, we share our insights on technological pathways to advance the selectivities through the sorption and migration mechanisms of transport. Directions for future studies will be proposed, and implications for the development of next-generation membranes and novel separation applications will be discussed.