Ceria-based electrolytes offer many advantages over traditional zirconia-based YSZ electrolytes, notably higher conductivities at lower operating temperatures and compatibility with high performance cathode materials. Fuel Cell Materials, offers a full line of ceria-based electrolyte materials for solid oxide fuel cell and ceramic oxygen generators. The incorporation of ceria into SOFC anodes enhances electro-catalytic activity and provides a viable path toward internal reforming and/or direct utilization of hydrocarbon fuels. Two standard ceria electrolyte compositions (doped with gadolinium or samarium) are offered as nanoscale powders for use in colloidal deposition processes and/or electrode additives, and as ceramic grade powders tailored for pellet pressing and/or tape casting processes. The nanoscale ceria electrolyte materials are available as 100 mesh powders or as dispersed aqueous suspensions. Additional doped ceria formulations compositions can be produced to your specifications.
Applications

· SOFC electrolytes (up to 700°C)

· Electrolyte for oxygen generation systems

· Additives for anodes and cathodes

· Interlayers for high performance SOFCs
Benefits

· Higher ionic conductivity than YSZ for better results at lower operating temperature

· Chemical inertness and thermal expansion match with high performance cathode materials such as LSF and LSCF

· Enhanced performance when used in composite electrodes

· High crystalline-phase and chemical purity
Materials Specifications

Material Specifications

Standard Compositions (*)


GDC10: (Ce0.90Gd0.10)O1.95

GDC20: (Ce0.80Gd0.20)O1.9

GDC15: (Ce0.85Gd0.15)O1.925

Crystal Structure


Single Phase Fluorite

Ionic Conductivity


σ > 0.015 S/cm @ 600°C

Thermal Expansion


GDC: α = 13.4 ppm/°C

SDC: α = 12.7 ppm/°C

(*) Custom formulations available
Product Specifications

Specification


Nanoscale Grade


Ceramic Grade

Crystallite Size


5-10 nm


100-200 nm

Particle Size


100 mesh


0.5 μm (d50)

1.25 μm (d90)

Surface Area


160-200 m2/gram


5-8 m2/gram

Sintering Temperature


1200-1250°C


1300-1350°C