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Development of lanthanum nickelate as a cathode for use in intermediate temperature solid oxide fuel cells

Sayers, R. and Rieu, Mathilde and Lenormand, Pascal and Ansart, Florence and Kilner, J. A. and Skinner, S. J. Development of lanthanum nickelate as a cathode for use in intermediate temperature solid oxide fuel cells. (2011) Solid State Ionics, 192 (1). 531-534. ISSN 0167-2738

(Document in English)

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Official URL: http://dx.doi.org/10.1016/j.ssi.2010.02.014


The performance of lanthanum nickelate, La2NiO4+δ (LNO), as a cathode in IT-SOFCs with the electrolyte cerium gadolinium oxide, Ce0.9Gd0.1O2−δ (CGO), has been investigated by AC impedance spectroscopy of symmetrical cells. A significant reduction in the area specific resistance (ASR) has been achieved with a layered cathode structure consisting of a thin compact LNO layer between the dense electrolyte and porous electrode. This decrease in ASR is believed to be a result of contact at the electrolyte/cathode boundary enhancing the oxygen ion transfer to the electrolyte. An ASR of 1.0 Ω cm2 at 700 °C was measured in a symmetrical cell with this layered structure, compared to an ASR of 7.4 Ω cm2 in a cell without the compact layer. In addition, further improvements were observed by enhancing the cell current collection and it is anticipated that a symmetrical cell consisting of a layered structure with adequate current collection would lower these ASR values further.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The orinal version is available at http://www.sciencedirect.com The original PDF of the article can be found at Solid State Ionics website: http://www.sciencedirect.com/science/article/pii/S0167273810000767
HAL Id:hal-03541504
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Imperial College London (UNITED KINGDOM)
Laboratory name:
Deposited On:04 May 2012 12:40

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