Hydration doubles oxide-ion conductivity at 500°C in Ba7Nb4MoO20, a promising ceramic electrolyte for low-temperature solid oxide fuel cells

https://www.eurekalert.org/news-releases/1094289

"increases interstitial oxygen ions... solid oxide/ proton ceramic fuel cells don't need precious metal catalysts, but require temperature as high as 1,000°C accelerating material degradation... overcome using Ba7Nb4MoO20 at lower temperature, exposed to water vapor improving conductivity/ diffusivity... hexagonal perovskite-related oxide where oxide ions migrate through interstitial sites in oxygen-deficient cubic close packed layer in its crystal structure... ion conductors used in fuel-/ steam electrolysis-cells"

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