Gadolinium-doped ceria

Gadolinium-doped ceria (GDC) (known alternatively as gadolinia-doped ceria, gadolinium-doped cerium oxide (GCO), cerium-gadolinium oxide (CGO), or cerium(IV) oxide, gadolinium-doped, formula Gd:CeO2) is a ceramic electrolyte used in solid oxide fuel cells (SOFCs). It has a cubic structure and a density of around 7.2 g/cm3 in its oxidised form.[1] It is one of a class of ceria-doped electrolytes with higher ionic conductivity and lower operating temperatures (<700 °C) than those of yttria-stabilized zirconia,[2] the material most commonly used in SOFCs. Because YSZ requires operating temperatures of 800–1000 °C to achieve maximal ionic conductivity, the associated energy and costs make GDC a more optimal (even "irreplaceable",[3] according to researchers from the Fraunhofer Society) material for commercially viable SOFCs.

  1. ^ Badwal, S. P. S.; Fini, D.; Ciacchi, F. T.; Munnings, C.; Kimpton, J. A.; Drennan, J. (2013). "Structural and microstructural stability of ceria – gadolinia electrolyte exposed to reducing environments of high temperature fuel cells". Journal of Materials Chemistry A. 1 (36): 10768. doi:10.1039/c3ta11752a.
  2. ^ "Gadolinia doped Ceria GDC | AMERICAN ELEMENTS ® Supplier & Info". Americanelements.com. 2010-08-24. Retrieved 2013-08-16.
  3. ^ "Publica". Publica.fraunhofer.de. Retrieved 2013-08-16.