Protonic ceramic fuel cells use oxide electrolytes with high protonic conductivity but suffer from low power densities due to sluggish oxygen reduction kinetics and high contact resistances. Here the authors integrate a PrBa0.5Sr0.5Co1.5Fe0.5O5+δ cathode and a BaZr0.4Ce0.4Y0.1Yb0.1O3 electrolyte, achieving exceptional power density and stability.
- Sihyuk Choi
- Chris J. Kucharczyk
- Sossina M. Haile
