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A Stable and Efficient Cathode for Fluorine‐Containing Proton‐Conducting Solid Oxide Fuel Cells
ChemSusChem ( IF 7.5 ) Pub Date : 2018-08-20 , DOI: 10.1002/cssc.201801193 Yun Xie 1 , Nai Shi 1 , Daoming Huan 1 , Wenzhou Tan 1 , Junfa Zhu 2 , Xusheng Zheng 2 , Haibin Pan 2 , Ranran Peng 1, 3, 4 , Changrong Xia 1
ChemSusChem ( IF 7.5 ) Pub Date : 2018-08-20 , DOI: 10.1002/cssc.201801193 Yun Xie 1 , Nai Shi 1 , Daoming Huan 1 , Wenzhou Tan 1 , Junfa Zhu 2 , Xusheng Zheng 2 , Haibin Pan 2 , Ranran Peng 1, 3, 4 , Changrong Xia 1
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Substitution of anions such as F− and Cl− can effectively improve the stability of proton‐conducting electrolytes at no expense to proton conduction. However, during operation, F− and Cl− in electrolytes can transfer to the cathodes, which reduces the stability of the electrolytes. In this work, F−‐doped Ba0.5Sr0.5Co0.8Fe0.2O3−δ [Ba0.5Sr0.5Co0.8Fe0.2O2.9−δF0.1 (F‐BSCF)] was prepared as a potential cathode for proton‐conducting solid oxide fuel cells with BaCe0.8Sm0.2F0.1O2.85 electrolyte. The incorporation of F− in the cathode depressed F− diffusion from the electrolyte and improved the stability of button cells. Temperature‐changing X‐ray photoelectron spectroscopy and electronic conductivity relaxation results demonstrated that the incorporation of F− enhanced the oxygen incorporation kinetics at intermediate temperatures and improved the cathode catalytic performance. Moreover, a button cell prepared with this novel cathode was stable for 270 h at a current density of 300 mA cm−2 and 700 °C, which was much superior than those containing a BSCF cathode.
中文翻译：
稳定，高效的含氟质子传导固体氧化物燃料电池阴极
阴离子如F的替代-和Cl -能有效地提高质子导电的电解质稳定性不惜代价质子传导。然而，在操作期间，F -和Cl -中的电解质可以转移到阴极，从而降低了电解质的稳定性。在这项工作中，F -掺杂的Ba 0.5锶0.5钴0.8铁0.2 ö 3- δ [巴0.5锶0.5钴0.8铁0.2 ø 2.9- δ ˚F 0.1[F-BSCF]]被制备为质子传导性固体电解质燃料电池的阴极，其中BaCe 0.8 Sm 0.2 F 0.1 O 2.85电解质。F的掺入-在阴极压下˚F -从电解质扩散的和改进的纽扣电池的稳定性。温度变化的X射线光电子能谱法和电子导电性松弛结果表明，F的掺入-增强在中间温度的氧结合动力学和改善了阴极的催化性能。此外，用这种新型阴极制备的纽扣电池在300 mA cm -2的电流密度下可稳定270小时 和700°C，这比包含BSCF阴极的阴极要好得多。
更新日期：2018-08-20
中文翻译：
稳定，高效的含氟质子传导固体氧化物燃料电池阴极
阴离子如F的替代-和Cl -能有效地提高质子导电的电解质稳定性不惜代价质子传导。然而，在操作期间，F -和Cl -中的电解质可以转移到阴极，从而降低了电解质的稳定性。在这项工作中，F -掺杂的Ba 0.5锶0.5钴0.8铁0.2 ö 3- δ [巴0.5锶0.5钴0.8铁0.2 ø 2.9- δ ˚F 0.1[F-BSCF]]被制备为质子传导性固体电解质燃料电池的阴极，其中BaCe 0.8 Sm 0.2 F 0.1 O 2.85电解质。F的掺入-在阴极压下˚F -从电解质扩散的和改进的纽扣电池的稳定性。温度变化的X射线光电子能谱法和电子导电性松弛结果表明，F的掺入-增强在中间温度的氧结合动力学和改善了阴极的催化性能。此外，用这种新型阴极制备的纽扣电池在300 mA cm -2的电流密度下可稳定270小时 和700°C，这比包含BSCF阴极的阴极要好得多。
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