Please use this identifier to cite or link to this item:
http://hdl.handle.net/10773/29084
Title: | Perovskite-like LaNiO3-δ as oxygen electrode material for solid oxide electrolysis cells |
Author: | Yaremchenko, A. A. Arias-Serrano, B. I. Zakharchuk, K. Frade, J. R. |
Issue Date: | 2019 |
Publisher: | Electrochemical Society (ECS) |
Abstract: | 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/10773/29084 |
ISBN: | 9781510896772 |
Appears in Collections: | CICECO - Comunicações DEMaC - Comunicações |
Files in This Item:
File | Description | Size | Format | |
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abstract_AYaremchenko_SOFC-XVI_OA40.pdf | 2.11 MB | Adobe PDF | View/Open |
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