期刊
JOURNAL OF POWER SOURCES
卷 193, 期 2, 页码 589-592出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2009.04.024
关键词
Lanthanum stronium cobalt ferrite; Solid oxide fuel cell; Cathode; Ultra-thin films; Nanocrystalline; Area-specific resistances; Microelectrode
资金
- Harvard University SEAS, SiEnergy Systems and University Center for Environment
Dense ultra-thin nanocrystalline La0.6Sr0.4Co0.8Fe0.2O3 (LSCF) films with thickness of similar to 50 nm, have been sputtered on nanoporous anodic alumina-supported nanocrystalline thin film yttria-stabilized zirconia and patterned by photolithography into microelectrodes. This approach enables low-temperature (425-550 degrees C) electrochemical properties of dense ultra-thin nanocrystalline LSCF to be characterized. The results reveal that the electrochemical resistance of nanocrystalline ultra-thin LSCF is dominated by the oxygen surface exchange reaction at the electrode surface with an activation energy of 1.1eV. Area-specific resistance of LSCF was obtained and the results are of potential relevance to utilizing nanostructured oxide cathodes for micro-SOFCs operated at low temperatures. (C) 2009 Elsevier B.V. All rights reserved.
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