Layered GdBa0.5Sr0.5Co2O5+δ as a cathode for intermediate-temperature solid oxide fuel cells

Oxygen permeation, thermal expansion behavior and electrochemical properties of LaBa0.5Sr0.5Co2O5+δ cathode for SOFCs

“…[8][9][10][11] The effect of Sr 2+ substitution of Ba 2+ in LnBaCo 2 O 5+d revealed higher electrical conductivity, an increase in oxygen content, excellent area specic resistance (ASR) values and good chemical stability. [12][13][14] In this work, LaBa 0.5 Sr 0.5 Co 2 O 5+d cathode characteristics such as thermogravimetric properties, electrical conductivity, chemical bulk diffusion coefficient (D chem ), oxygen permeation, the exchange current density (i o ) determined via electrochemical impedance spectrometry (EIS), low-eld (LF) and high eld (HF) techniques, and the main process of the ORR were studied, as a potential cathode for IT-SOFC cells. for 4 h. The Ce 0.8 Sm 0.2 O 1.9 (SDC) powder was synthesized via coprecipitation using Ce(NO 3 ) 3 $6H 2 O and Sm(NO 3 ) 3 $6H 2 O as the starting materials.…”

Thermal expansion of layered cobaltites Y(Ba1 −xSrx)Co2O5 + δwithx= 0, 0.05 and 0.10

“…Recently, layered cobaltites have also turned into a focus of attention as promising cathodes for intermediate temperature solid oxide fuel cells (see [18] and [19] and references therein), combining a faster oxygen transport than their simple perovskite relatives with a good electronic conduction above the metal-insulator transition temperature. In addition, the Sr-doped cobaltites Sm(Ba 0.5 Sr 0.5 )Co 2 O 5+δ , Nd(Ba 0.5 Sr 0.5 )Co 2 O 5+δ and Gd(Ba 0.5 Sr 0.5 )Co 2 O 5+δ have been found to be good candidates due to their improved area-specific resistance and chemical stability in contact with different electrolytes [20][21][22]. Such potential application requires a more profound knowledge of their stability and high-temperature properties.…”

High-temperature behavior of Sr-doped layered cobaltites Y (Ba1 −xSrx)Co2O5.5: phase stability and structural properties

“…Although the most intensively studied aspects of these systems remain the low-temperature properties and their attractive underlying fundamental physics, during the last few years interest has also emerged in the field of cathodes for intermediate temperature solid oxide fuel cells [21][22][23][24][25][26][27][28]. The ordered nature of layered cobaltites improves transport compared to non-ordered perovskites, combining oxygen transport with good electronic conduction above the metalinsulator transition temperature.…”