A Study of Preparation and Cathode Properties in
La0.5Ba0.5-xCaxFeO3 Provskite Materials for Solid Fuel Cells
YANG Feiran
ZHOU Qingjun
LI Zepeng
DU Mingrun
BU Fanxing
Abstract：Under conditionof the dual-carbon target background,the development of new energy materials and technologies is one of the main issues.Fe-based perovskite cathode materials are potential hot materi-als for cathode materials of solid fuel cells at medium and low temperatures.Taking La0.5Ba0.5FeO3 as ma-trix materials,Ca ion is doped by replacing some Ba atoms to make the ratio of Ba and Ca double ions ad-justed,and a series of cathode materials La0.5Ba0.5-xCax FeO3(x=0.1,0.25,0.4,0.5)are synthesized by a solid state reaction method.And the phase structure,thermal expansion behavior,conductivity,electro-catalytic activity and battery electrode performance are systematically studied.The overall structure of the sample is of cubic perovskite.La0.5Ba0.5-xCaxFeO3 is characterized by a good thermal compatibility with the thermal expansion coefficient of electrolyte.The maximum conductivity of La0.5Ba0.1Ca0.4FeO3 is 187.7 S/cm.The Ca doping is to greatly improve the output power density of cell with La0.5Ba0.5-xCaxFeO3 as electrode to make the output power density stable relatively,and the peak power density reaches 595 mW/cm2 at 800 ℃.The doping of Ca ion can promote the performance of La05Ba0.5-xCaxFeO3 cathode materi-al,and such doping material is a good candidate material for intermediate temperature solid oxide fuel cell(IT-SoFc)cathode.
Keywords：new energy materialssolid fuel cellPerovskitedopingLaFeO3cathode performance
Publication Date：2023-12-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 120-127 )