Ion transport is fundamental to nearly every process involving the transfer or conversion of chemical to electrical energy. Ion-transport membranes underpin many biological systems and are crucial to a diverse array of energy-related applications including: fuel cells, electrolyzers, batteries, electrochromics, chemical separators, membrane reactors, and sensors.The vision of this interdisciplinary research group posits that, “Fundamental understanding of ionic transport in novel, nanostructured systems can drive dramatic improvement in energy conversion efficiencies.” Center research in this area emphasizes intelligent microstructural design of composite membranes with improved stability, operational range, impurity tolerance, and transport efficiency and selectivity.