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http://hdl.handle.net/10773/29079
Título: | Perovskite-like LaNiO3-δ as oxygen electrode material for solid oxide electrolysis cells |
Autor: | Yaremchenko, Aleksey Arias-Serrano, Blanca I. Zakharchuk, Kiryl Frade, Jorge R. |
Data: | 2019 |
Editora: | Electrochemical Society |
Resumo: | Perovskite-like LaNiO3-δ was evaluated as potential oxygen electrode material for solid oxide electrolysis cells. Compared to the Ruddlesden-Popper Lan+1NinO3n+1 (n = 1,2,3) counterparts, LaNiO3-δ exhibits higher p-type metallic-like conductivity under oxidizing conditions (450 S×cm-1 at 800°C for highly porous ceramics) together with a moderate thermal expansion coefficient (13.7 ppm×K-1 in air at 25-800°C) compatible with common solid electrolytes. The measured electrode polarization resistance (Rη) in contact with YSZ, CGO and LSGM solid electrolytes was 1.4, 0.77 and 0.22 Ω×cm2 at 800°C, and 208, 123 and 7.1 Ω×cm2 at 600°C, respectively, under zero-current conditions in air. Surface modification of via PrOx infiltration resulted in lower values of Rη (0.024 Ω×cm2 at 800°C and 0.76 Ω×cm2 at 600°C) and low anodic overpotentials (20 mV at 800°C and 500 mA×cm-2) in contact with LSGM. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/29079 |
DOI: | 10.1149/09101.2399ecst |
ISSN: | 1938-5862 |
Aparece nas coleções: | CICECO - Artigos DEMaC - Artigos |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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ECSTrans_91_(2019)_2399.pdf | 576.01 kB | Adobe PDF | Ver/Abrir |
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