Effects of rare-earth ion species and their concentrations on the proton conductivity of ceria

Key Points

• Proton conductivity improves as rare-earth ion concentration increases, demonstrating significant enhancement effects.
• The study found optimal doping concentrations led to a conductivity increase of 0.12 S/cm at 800°C.
• Assessment using ionic conduction metrics and various rare-earth ion species showcased diverse conductive properties.
• The findings highlight the potential for tailoring ceria-based electrolytes through specific doping methods to enhance performance.