Schematic illustration of the self-assembled dual-phase BCFZnYb@NPs cathode for protonic ceramic fuel cells (IMAGE)

Tsinghua University Press

Schematic illustration of the self-assembled dual-phase BCFZnYb@NPs cathode for protonic ceramic fuel cells

Caption

The BCFZnYb@NPs cathode features a cubic perovskite matrix decorated with in-situ exsolved hexagonal BaCoO3-δ nanoparticles. The Zn/Yb B-site co-doping introduces cation-driven charge modulation that increases oxygen vacancy concentration while lowering formation and migration energies, enhancing surface exchange and bulk diffusion. The self-assembled dual-phase structure synergistically promotes oxygen reduction reaction kinetics, delivering a peak power density of 0.99 W cm-2 at 600 ℃ and stable operation over 100 h.

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Journal of Advanced Ceramics, Tsinghua University Press

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