Low-temperature solid oxide fuel cells based on Tm-doped SrCeO2-δ semiconductor electrolytes

Low-temperature solid oxide fuel cells (LT-SOFCs) are a promising fuel cell technology but often suffer from low ionic conductivity of the electrolyte. Herein, we develop a solid electrolyte with high ionic conductivity based on thulium (Tm)-doped composite Sr0.1TmxCe0.9-xO2-δ [x = 0.1] having a cubic fluorite structure. The fuel cell using Tm-doped SrCeO2-δ electrolyte achieved the power output of 682 mW/cm2 at 550 °C with an open-circuit...