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Researchers developed a new family of Aurivillius-type oxide-ion conductors that achieve high ionic conductivity at just 350°C, well below the operating temperature of conventional solid oxide fuel cells. The optimized magnesium-doped layered film created fast ion-conducting channels and enabled fuel cells to reach a power density of 0.726 W/cm² at 400°C with stable operation, offering a pathway toward more durable, lower-cost hydrogen fuel cells with simpler thermal management.

https://www.nature.com/articles/s41560-026-02115-5
Nature Low-temperature oxide-ion conduction in Aurivillius-type ((Na0.5Bi0.5)n–1TinO3n)(Bi2O2) phases Nature Energy - Solid oxide-ion conductors are essential for high-temperature electrochemical technologies, yet few materials maintain sufficient ion mobility at lower temperatures, where...
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