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LaNi 0.6 Fe 0.4 O 3− δ as a Promising Cathode for Stable Proton‐conducting Solid Oxide Fuel Cells
Author(s) -
Chen K.,
Dai H.,
He S.,
Bi L.
Publication year - 2018
Publication title -
fuel cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.485
H-Index - 69
eISSN - 1615-6854
pISSN - 1615-6846
DOI - 10.1002/fuce.201700224
Subject(s) - cathode , materials science , electrolyte , cobalt , anode , oxide , polarization (electrochemistry) , solid oxide fuel cell , fuel cells , chemical engineering , ceramic , analytical chemistry (journal) , inorganic chemistry , electrode , composite material , chemistry , metallurgy , chromatography , engineering
A cobalt‐free material, LaNi 0.6 Fe 0.4 O 3– δ (LNF), was applied as a potential cathode for solid oxide fuel cells (SOFCs) using chemically stable BaZr 0.8 Y 0.2 O 3– δ (BZY20) electrolyte for the first time. LNF was synthesized, and this material showed a good compatibility with BZY20 at high temperatures. The anode supported BZY20 cell with the LNF cathode was fabricated and tested, which showed a decent cell performance of 217, 107, and 46 mW cm −2 at 700, 650, and 600 °C, respectively. This fuel cell performance was significantly higher than that for the cells using cobalt‐free cathode and BaZrO 3 ‐based electrolyte in literature reports. Furthermore, the polarization resistance of the LNF cathode was restricted to 0.15 Ω cm 2 at 700 °C, which was quite small and even can be compared with that for some cobalt‐containing cathodes for BaZrO 3 ‐based cells. These experimental results indicate LNF could be an alternative and promising cathode for proton‐conducting cells with BaZrO 3 ‐based ceramic electrolyte, providing an alternative route for choosing and designing their cathode materials.