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Low-temperature oxide-ion conduction in Aurivillius-type ((Na<sub>0.5</sub>Bi<sub>0.5</sub>)<sub><i>n</i>–1</sub>Ti<sub><i>n</i></sub>O<sub>3<i>n</i></sub>)(Bi<sub>2</sub>O<sub>2</sub>) phases
23 July 2026 at 01:00
Nature Energy, Published online: 23 July 2026; doi:10.1038/s41560-026-02115-5
Solid oxide-ion conductors are essential for high-temperature electrochemical technologies, yet few materials maintain sufficient ion mobility at lower temperatures, where degradation is reduced and a broader range of materials can be used for auxiliary components. Here the authors introduce Aurivillius-type thin-film conductors that form periodic fast ion channels and achieve promising conductivity at 350 °C.