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Functionally graded composite LaNiO and LaNiO solid oxide fuel cell cathodes

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Title: Functionally graded composite LaNiO and LaNiO solid oxide fuel cell cathodes
Authors: Woolley, RJ
Skinner, SJ
Item Type: Journal Article
Abstract: Functionally graded electrodes have been fabricated from members of the (LaNiO3)nLaO Ruddlesden-Popper family. These consist of a thin compact layer of La2NiO4 + δ deposited on the electrolyte, topped by a thicker porous La2NiO4 + δ + La4Ni310 - δ composite layer, completed by a thin porous La4Ni3O10 - δ layer acting as a current collector. The microstructure and electrochemical role of these layers are discussed in detail. It was found that using a 50:50 wt.% mix in the composite layer gave the best performance; ASRs at 500, 550, 600, 650, and 700 C were 15.6, 5.53, 2.29, 1.06 and 0.53 Ω cm2 respectively. This represents high performance for this class of material, particularly notable at the lower-end of the temperature range. As such this grading process is an attractive proposition for further research towards lowering the operating temperature of SOFCs. © 2013 Elsevier B.V.
Issue Date: 1-Feb-2014
URI: http://hdl.handle.net/10044/1/15534
DOI: http://dx.doi.org/10.1016/j.ssi.2013.11.041
ISSN: 0167-2738
Start Page: 1
End Page: 5
Journal / Book Title: Solid State Ionics
Volume: 255
Copyright Statement: © 2013 Elsevier B.V. All rights reserved.NOTICE: this is the author’s version of a work that was accepted for publication in Solid State Ionics. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in SOLID STATE IONICS, Vol.:255,(2014) DOI: 10.1016/j.ssi.2013.11.041
Appears in Collections:Materials