无机材料学报2025，Vol.40Issue(4)：363-371,中插1-中插4,13.DOI:10.15541/jim20240404
固体氧化物燃料电池Pr1+xBa1-xFe2O5+δ阴极材料的制备及电化学性能研究
Pr1+xBa1-xFe2O5+δ Cathode Materials for Solid Oxide Fuel Cells:Preparation and Electrochemical Performance
摘要
Abstract
PrBaFe2O5+δ(PBF)is one of the most promising cathode materials for intermediate-temperature solid oxide fuel cell(IT-SOFC).Although PBF possesses similar area specific resistance(ASR)to that of Co-based cathode materials,electronic conductivity of PBF is an order of magnitude lower.Up to now,various doping strategies have been reported to enhance the electrochemical performance of this material,but still leaving it an open issue.In this study,PBF and Pr1+xBa1-xFe2O5+δ(PBFx,x=0.01,0.02,and 0.04)materials were synthesized by replacing Ba in PBF with excessive Pr using a Sol-Gel method,and their electrochemical performances as IT-SOFC cathodes were evaluated.Forx=0.01,excessive Pr enters the lattice interstitials of PBF.For x≥0.02,0.01(in molar)excessive Pr occupies interstitial sites,while the rest replaces Ba in PBF.Over the temperature range of 650-800℃,excessive Pr promotes the conductivity of PBF,and PBF0.01 exhibits the highest conductivity of 109.21 S·cm-1,improving by 76％,which is attributed to the reduction in electronic transport path length.Furthermore,the excessive Pr contributes to lattice stress and dislocation density,reducing oxygen reduction reaction(ORR)activity and slightly increasing ASR of the cathode.Compared to PBF device,the peak power density of the Ni-SDC|SDC|PBF0.01(SDC:Sm0.2Ce0.8C2-δ)single cell increased by approximately 49％,indicating that excessive Pr can significantly improve the electrochemical performance of cathode materials.关键词
固体氧化物燃料电池/PrBaFe2O5+δ/阴极/电化学性能Key words
solid oxide fuel cell/PrBaFe2O5+δ/cathode/electrochemical performance分类
动力与电气工程引用本文复制引用
薛柯,蔡长焜,谢满意,李舒婷,安胜利..固体氧化物燃料电池Pr1+xBa1-xFe2O5+δ阴极材料的制备及电化学性能研究[J].无机材料学报,2025,40(4):363-371,中插1-中插4,13.基金项目
国家自然科学基金(51974167) （51974167）
内蒙古自然科学基金(2023QN05038) （2023QN05038）
内蒙古自治区高等教育碳达峰碳中和研究项目(STZX202210)National Natural Science Foundation of China(51974167) （STZX202210）
Natural Science Foundation of Inner Mongolia(2023QN05038) （2023QN05038）
Higher Education Carbon Peak Carbon Neutral Research Project of Inner Mongolia Autonomous Region(STZX202210) （STZX202210）
