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Ag‐Bi 1.5 Y 0.5 O 3 Composite Cathode Materials for BaCe 0.8 Gd 0.2 O 3 ‐Based Solid Oxide Fuel Cells
Author(s) -
Wu Zhonglin,
Liu Meilin
Publication year - 1998
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1998.tb02471.x
Subject(s) - materials science , electrolyte , cathode , dielectric spectroscopy , electrochemistry , ionic bonding , thermal stability , oxide , composite number , phase (matter) , ionic conductivity , analytical chemistry (journal) , composite material , electrode , chemical engineering , ion , chemistry , metallurgy , engineering , organic chemistry , chromatography
Ag‐Bi 1.5 Y 0.5 O 3 composites exhibit high electronic and ionic conductivities when the volume fraction of the silver phase is properly chosen, indicating that these composites are candidate cathode materials for solid‐state ionic devices. In this study, the chemical and thermal compatibilities between Ag‐Bi 1.5 Y 0.5 O 3 composites and BaCe 0.8 Gd 0.2 O 3 electrolyte are studied at intermediate temperatures. Furthermore, the electrochemical properties of the interfaces between the composites and the electrolyte are characterized under various conditions using impedance spectroscopy. The stability of the electrodes is estimated from the time dependence of the interfacial resistances. Results indicate that Ag‐Bi 1.5 Y 0.5 O 3 composites are promising cathode materials for solid oxide fuel cells based on BaCe 0.8 Gd 0.2 O 3 electrolyte at intermediate temperatures.