Exceptional oxide ion conductivity at lower temperatures offers potential solution for solid-state fuel cells

Oxide ion conductors used in solid-state fuel cells often fail to reach full potential when operating at temperatures below 500 oC, but researchers from Tokyo Tech have recently found a solution to this problem. They demonstrated high conductivity and stability in bismuth-containing Sillén oxyhalides with triple fluorite-like layers (e.g., 10 mS/cm at 431 oC; 204 times higher conductivity than that of conventional conductors at 310 oC).

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