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Ion Transport Membranes

Principal Investigator(s): 

Abstract: 

Ion transport membranes are useful in gas separation such as production of O2 and H2 gasses and the manufacturing of syn gas. Our lab’s advances in fundamentals of ionic transport have led to increased ion selectivity and permeability of membranes. We have developed materials that not only provide higher ionic conductivity, but do so at a dramatically lower temperatures than previously required.

Our development of a bismuth oxide bi-layer electrolyte is particularly exciting. The study of ionic transport in cubic bismuth oxides is important technically because these materials exhibit the highest oxygen-ion conductivity of any material known to date. From a scientific point of view, the study of ionic transport in cubic bismuth oxides also provides an understanding of how anion transport in oxides with the fluorite structure is influenced by high vacancy concentration and how this is influenced by local structure.