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- Title
Impact of electrical conductivity and the electrochemical performance of La<sub>2</sub>NiO<sub>4+δ</sub> and La<sub>4</sub>Ni<sub>3</sub>O<sub>10±δ</sub> cathodes on symmetric cells for intermediate-temperature SOFCs.
- Authors
Costilla-Aguilar, S. U.; Escudero, M. J.; González-González, Virgilio; Torres-Castro, Alejandro; Avellaneda, D.; Cienfuegos-Pelaes, R. F.; Aguilar-Martinez, J. A.
- Abstract
In the present work, the Ruddlesden-Popper (RP) phases La2NiO4+δ (La2) and La4Ni3O10±δ (La4) were employed as cathode materials with Gd0.1Ce0.9O2-δ (GDC) electrolyte for intermediate-temperature solid oxide fuel cells (IT-SOFCs). Cathode inks were deposited on the GDC substrate by the dip-coating technique. The electrochemical properties of the cathode in symmetric cells with GDC were investigated. The area-specific resistance (ASR) of the La4Ni3O10±δ cathode is lower than that of the La2NiO4+δ cathode at 600, 700, and 800 ºC, with values of 6.91, 1.22, and 0.23 Ω cm2, respectively. These values are better than other RP families previously reported. This work combines cathode layers to form multilayers as a La2La4La2 symmetric cell, enhancing the oxygen reduction reaction (ORR) properties, which exhibit an ASR value of 0.12 Ω cm2 at 800 °C. We report a performance in a symmetric cell using a configuration with La2 and La4 cathodes that could be a promising alternative for IT-SOFCs.
- Subjects
ELECTRIC conductivity; SOLID oxide fuel cells; GADOLINIUM
- Publication
Journal of Materials Science, 2024, Vol 59, Issue 23, p10357
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-024-09740-z