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Tailoring cathode composite boosts the performance of proton-conducting SOFCs fabricated by a one-step co-firing method
Journal of the European Ceramic Society ( IF 5.7 ) Pub Date : 2018-02-14 , DOI: 10.1016/j.jeurceramsoc.2018.02.022
Hailu Dai , Eman Husni Da'as , Shahid P. Shafi , Huiqiang Wang , Lei Bi

A strategy of tailoring the ceramic cathode composite is presented to improve the performance of proton-conducting solid oxide fuel cells (SOFCs) prepared by a one-step co-firing process. Comparing to the conventional way of using BaCe0.7Zr0.1Y0.2O3-δ (BCZY) in the composite cathode for BCZY-electrolyte based cells, the replacement of BCZY by BaZr0.8Y0.2O3-δ (BZY) mitigates the reaction between the two ceramic phases in the composite cathode during the co-firing process and also keeps the cathode with sufficient porosity for ample gas diffusion which could assist in adequate cathode reactions. As a result, the BCZY-electrolyte based cell with Sm0.5Sr0.5CoO3-δ (SSC)-BZY composite cathode shows a power output of 300 mW cm−2 at 600 °C, which is the largest ever reported for proton-conducting SOFCs prepared by a one-step co-firing process. The strategy of tailoring the composite cathode offers both small ohmic resistance and polarization resistance, providing a promising way to develop single-step co-fired proton-conducting SOFCs.



中文翻译:

定制阴极复合材料可提高通过一步共烧方法制造的质子传导SOFC的性能

提出了一种定制陶瓷阴极复合材料的策略,以改善通过一步共烧工艺制备的质子传导固体氧化物燃料电池(SOFC)的性能。与在BCZY电解质基电池的复合阴极中使用BaCe 0.7 Zr 0.1 Y 0.2 O 3- δ(BCZY)的常规方法相比,用BaZr 0.8 Y 0.2 O 3- δ代替BCZY(BZY)可减轻共烧过程中复合阴极中两个陶瓷相之间的反应,并保持阴极具有足够的孔隙率,以使气体充分扩散,从而有助于充分的阴极反应。结果,具有Sm 0.5 Sr 0.5 CoO 3- δ(SSC)-BZY复合阴极的BCZY电解质电池在600°C时显示300 mW cm -2的功率输出,这是有史以来最大的质子-进行通过一步共烧工艺制备的SOFC。定制复合阴极的策略可同时提供较小的欧姆电阻和极化电阻,为开发单步共烧质子传导SOFC提供了一种有前途的方法。

更新日期:2018-02-14
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