高性能H-SOFC质子阻塞复合阴极材料PBSF-SDC  

High Performance H-SOFC Proton-blocking Composite Cathode Material PBSF-SDC

作　　者：蔡彬[1] 宋腾飞 刘洋 武常辉 卢飞 苏金瑞 CAI Bin;SONG Tengfei;LIU Yang;WU Changhui;LU Fei;SU Jinrui(Key Laboratory of Material Physics of Ministry of Education, School of Physics and Engineering, Zhengzhou University, Zhengzhou 450001, China)

机构地区：[1]郑州大学物理工程学院材料物理教育部重点实验室,河南郑州450001

出　　处：《郑州大学学报（理学版）》2020年第2期95-101,共7页Journal of Zhengzhou University:Natural Science Edition

基　　金：国家自然科学基金项目(51371160)。

摘　　要：采用EDTA-柠檬酸络合法制备了新型的无钴钙钛矿氧化物Pr0.5Ba0.25Sr0.25FeO3-δ(PBSF),XRD分析表明PBSF为立方钙钛矿结构,同时与Ce0.8Sm0.2O1.9(SDC)和BaZr0.1Ce0.7Y0.2O3-δ(BZCY)在1000℃时具有良好的化学相容性。PBSF的热膨胀系数为15.2×10^-6 K^-1,明显低于Co基钙钛矿材料。以PBSF-SDC为阴极、NiO-BZCY为阳极、BZCY为电解质的单电池在750℃时最大功率密度为(865±38)mW/cm^2,极化电阻为0.092Ω·cm^2。结果表明,PBSC-SDC质子阻塞型复合阴极在H-SOFCs中具有潜在的应用前景。A novel Co-free perovskite oxide powder Pr0.5Ba02.5Sr0.25FeO3-δ(PBSF)was prepared by EDTA-citric acid complexation method.XRD analysis showed that PBSF was cubic perovskite structure.At the same time,a good chemical compatibility was observed among PBSF,Ce0.8Sm0.2O1.9(SDC)and BaZr0.1Ce0.7Y0.2O3-δ(BZCY).The thermal expansion coefficient of PBSF was 15.2×10^-6 K^-1,which was obviously better than that of Co-based perovskite material.The maximum power density and polarization resistance at 750℃of single cell with NiO-BZCY|BZCY|PBSF-SDC configuration were(865±38)mW·cm^-2 and 0.092Ω·cm^2,respectively.The results suggested that the proton-blocking composite cathode PBSF-SDC had a good application prospect in H-SOFCs.

关 键 词：H-SOFCs 质子阻塞复合阴极 立方钙钛矿PBSF 电化学性能 热膨胀系数 

分 类 号：TM911.42[电气工程—电力电子与电力传动]