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A Highly Active Perovskite Cathode for Low‐Temperature Solid Oxide Fuel Cells: BaCo 0.7 Fe 0.22 Sc 0.08 O 3– δ
Author(s) -
He Wei,
Dong FeiFei,
Wu XueLian,
Ni Meng
Publication year - 2017
Publication title -
advanced sustainable systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.499
H-Index - 24
ISSN - 2366-7486
DOI - 10.1002/adsu.201700005
Subject(s) - cathode , perovskite (structure) , anode , oxide , materials science , electrolyte , polarization (electrochemistry) , electrochemistry , fuel cells , solid oxide fuel cell , chemical engineering , inorganic chemistry , analytical chemistry (journal) , electrode , nanotechnology , chemistry , metallurgy , engineering , chromatography
Low‐temperature solid oxide fuel cells (LT‐SOFCs) have attracted much attention for their long‐term stability, short start‐up time, and economic competitiveness. Development of a high electrochemical active cathode for the oxygen reduction reaction (ORR) is the key to LT‐SOFCs. In this study, a cubic perovskite BaCo 0.7 Fe 0.22 Sc 0.08 O 3– δ (BCFSc) is synthesized and investigated. It exhibits extremely low polarization resistances (e.g., 0.03 Ω cm 2 at 600 °C) in symmetric cell using Ce 0.8 Sm 0.2 O 1.9 (SDC) as the electrolyte, indicating an excellent ORR catalytic activity. A maximum output power density of 1446 mW cm −2 is achieved at 600 °C for a single cell with an anode functional layer, which is much larger than the one without it (1045 mW cm −2 ). The favorable performance enables BCFSc to be a candidate cathode for LT‐SOFCs.