title: Enhancing oxide ion incorporation kinetics by nanoscale Yttria-doped ceria interlayers.
abstract: Interlayering 17.5 nm of Yttria-doped ceria (YDC) thin films between bulk yttria-stabilized-zirconia electrolyte and a porous Pt cathode enhanced the performance of low-temperature solid oxide fuel cells. The added YDC interlayer (14.11% doped Y(2)O(3)) was fabricated by atomic layer deposition and reduced the cathode/electrolyte interfacial resistances while increasing the exchange current density j(0) by a factor of 4 at operating temperatures between 300-500 °C. Tafel plots and the fitted impedance data suggest that the charge transfer coefficient α of interlayered SOFCs was 1.25 times higher, and the electrode/interfacial activation energy was reduced from 0.85 to 0.76 eV.
authors.affiliation: Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States. fanzeng@stanford.edu
authors.forename: Zeng
authors.initials: Z
authors.lastname: Fan
authors.forename: Fritz B
authors.initials: FB
authors.lastname: Prinz
mesh_terms: D002563:Cerium / Q000737:chemistry*; D007477:Ions / Q000737:chemistry; D007700:Kinetics; D008567:Membranes, Artificial; D010087:Oxides / Q000737:chemistry*; D010316:Particle Size; D013499:Surface Properties; D015019:Yttrium / Q000737:chemistry*
chemical_list: D007477:Ions; D008567:Membranes, Artificial; D010087:Oxides; D002563:Cerium; D015019:Yttrium; C030583:ceric oxide; C091417:yttria