Electrical properties of multidoped ceria

Structural, morphological and electrical properties of Ce1−Ru O2−δ (x=0.005–0.02) solid solutions

“…Activation energies of electrical conductivity of bulk (κ b ) and grain boundary (κ gb ) for sintered Ce 0.995 Ru 0.005 O 2 À δ sample are 0.21 and 0.22 eV, respectively. Based on the published studies of different authors [17,51,53,64], it can be concluded that the values of E a presented in this study are lower by almost a whole order of magnitude. Also, comparing the obtained values of E a with activation energies of similar oxygen ion conductors which have larger dopants concentration (15% and 20%) [17,21,22,31,51,53], here found E a values were much lower.…”

“…With application of very well developed electrochemical impedance spectroscopy method for studying the electrical properties of solid electrolytes [17,19,21,23,31,[63][64][65][66], beside the total electrical conductivity, it is possible to get the information about the separate contribution of bulk and grain boundary resistance. Additionally, it is possible to get the information about the electrochemical processes at the electrolyte/metal boundaries.…”

Preparation and performance of solid oxide fuel cells with YSZ/SDC bilayer electrolyte

“…DPC (doped-CeO 2 ), such as Sm-doped CeO 2 (SDC), Gd-doped CeO 2 (GDC) and Y-doped CeO 2 (YDC) has been proposed as a potential candidate for intermediate temperature-SOFC (IT-SOFC) electrolyte which works at operating temperature range 600-800 1C, due to its higher conductivity and lower conduction activation energy compared to YSZ (Y 2 O 3 -stabilized ZrO 2 ) [1][2][3][4][5][6][7][8][9][10][11][12][13]. However, DPC is an ion-and-electron mixed conductor in reduction atmosphere.…”

The influence of co-sintering Bi2O3 on Yb0.2Ce0.8O2-δ ceramic SOFC

“…Materials that has been reported used as an electrolyte in SOFC are Bi2O3, LSGM, ZrO2 and CeO2 [7][8][9][10]. CeO2 is an electrolyte ceramic that an insulator but can increase of conductivity by the substitution of trivalent oxide [11].…”

“…Solid state reaction method has advantage easy to construct stoichiometry and relatively inexpensive method [17]. By contrast, the solid-state reaction method has disadvantage needs hightemperature process [10,18]. Natural sintering of ytterbium doped cerium (YBDC) needs a high temperature (1500-1700 °C), to lower sintering temperature commonly use co-sintering such as Bi2O3 [19][20].…”