Polarization Promoted Chemical Reaction between Ba0.5Sr0.5Co0.8Fe0.2O3-δ Cathode and Ceria Based Electrolytes of Solid Oxide Fuel Cells
MetadataShow full item record
The chemical compatibility of Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) electrodes with ceria based electrolytes is investigated under solid oxide fuel cell (SOFC) operation conditions. BSCF reacts with both Ce0.9Gd0.1O1.95 (GDC) and Ce0.8Sm0.2O1.95 (SDC) at 900°C, forming barium cerate (BaxCe1-yMyO3, where M= Gd or Sm). Under cathodic current passage, the interaction between BSCF and ceria-based electrolyte takes place at temperatures as low as 700°C, forming Ba-containing particles (probably barium cerate) at the electrode/electrolyte interface. The results show that cathodic polarization promotes the chemical reaction between BSCF and ceria-based electrolyte. The accelerated reaction between BSCF and ceria is most likely related to the Ba segregation under influence of polarization and/or temperature.
Showing items related by title, author, creator and subject.
Solid oxide fuel cells with both high voltage and power output by utilizing beneficial interfacial reactionSu, C.; Shao, Zongping; Lin, Y.; Wu, Y.; Wang, H. (2012)An intriguing cell concept by applying proton-conducting oxide as the ionic conducting phase in the anode and taking advantage of beneficial interfacial reaction between anode and electrolyte is proposed to successfully ...
Polarization-Induced Interface and Sr Segregation of in Situ Assembled La0.6Sr0.4Co0.2Fe0.8O3−δ Electrodes on Y2O3–ZrO2 Electrolyte of Solid Oxide Fuel CellsChen, K.; Li, N.; Ai, N.; Cheng, Yi; Rickard, W.; Jiang, S. (2016)© 2016 American Chemical Society.Application of cobaltite-based electrodes such as La0.6Sr0.4Co0.2Fe0.8O3-d (LSCF) on Y2O3-ZrO2 (YSZ) electrolyte in solid oxide fuel cells (SOFCs) generally requires the use of a doped ...
A top-down strategy for the synthesis of mesoporous Ba0.5Sr0.5Co0.8Fe0.2O3-δ as a cathode precursor for buffer layer-free deposition on stabilized zirconia electrolyte with a superior electrochemical performanceSu, C.; Xu, X.; Chen, Y.; Liu., Y.; Tade, Moses; Shao, Zongping (2015)We develop a facile and effective top-down method for the fabrication of mesoporous Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) oxide with a high specific surface area (∼25 m2 g−1). The original BSCF is first synthesized by the simple ...