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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1 000℃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/cm2,极化电阻为0.092Ω·cm2。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。
Abstract：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■ configuration were(865±38) mW·cm-2 and 0.092 Ω·cm2, respectively. The results suggested that the proton-blocking composite cathode PBSF-SDC had a good application prospect in H-SOFCs.
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基本信息:
DOI：10.13705/j.issn.1671-6841.2019139
中图分类号:TM911.4
引用信息:
[1]蔡彬,宋腾飞,刘洋,等.高性能H-SOFC质子阻塞复合阴极材料PBSF-SDC[J],2020,52(02):95-101.DOI:10.13705/j.issn.1671-6841.2019139.
基金信息:
国家自然科学基金项目(51371160)
2019-04-24
2019
2020-06-12
2020
2