Diffusion of Oxygen at Ceramic Interfaces for High-Temperature Solid Oxide Fuel Cells |
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| Journal | Defect and Diffusion Forum (Volumes 242 - 244) |
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| Volume | Defects and Diffusion in Ceramics - An Annual Retrospective VII |
| Edited by | David J. Fisher |
| Pages | 129-142 |
| DOI | 10.4028/www.scientific.net/DDF.242-244.129 |
| Citation | Teruhisa Horita et al., 2005, Defect and Diffusion Forum, 242-244, 129 |
| Authors | Teruhisa Horita, Haruo Kishimoto, Katsuhiko Yamaji, Natsuko Sakai, Yue Ping Xiong, Manuel E. Brito, Harumi Yokokawa |
| Keywords | Cathode Reaction, Metallic Interconnect, Oxide Scale, Oxygen Diffusion, Solid Oxide Fuel Cell (SOFC) |
| Abstract | Oxygen diffusion was measured at oxygen/cathode/electrolyte interfaces and at oxide scales/alloy interconnects in Solid Oxide Fuel Cells (SOFCs). A stable isotope oxygen exchange technique (16O/18O exchange) was adopted to label the diffusion profiles in the oxides, and secondary ion mass spectrometry (SIMS) depth profiles were examined to determine the diffusion coefficients in the oxide ceramic materials. Diffusivity of oxygen in LaMnO3 cathode was measured under polarized condition (that is, considering the electrochemical process and diffusion). Also, oxygen diffusion in the oxide scales formed on the alloy was measured to clarify the formation mechanism of oxide scale. |
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