材料科学
阴极
电解质
阳极
兴奋剂
钙钛矿(结构)
电化学
氧化物
电导率
化学工程
陶瓷
固体氧化物燃料电池
无机化学
电极
光电子学
冶金
物理化学
化学
工程类
作者
Birkneh Sirak Teketel,Bayu Admasu Beshiwork,Dong Tian,Shiyue Zhu,Halefom G. Desta,Kashif Khan,Yonghong Chen,Bin Lin
出处
期刊:Catalysts
[MDPI AG]
日期:2022-04-27
卷期号:12 (5): 488-488
被引量:8
标识
DOI:10.3390/catal12050488
摘要
Proton-conducting solid–oxide fuel cell (H-SOFC) is an alternative promising low-temperature electrochemical cell for renewable energy, but the performance is insufficient because of the low activity of cathode materials at low temperatures. A layered perovskite oxide PrBaFe1.9Zn0.1O5+δ (PBFZ) was synthesized and investigated as a promising cathode material for low-temperature H-SOFC. Here, the partial substitution of Fe by Zn further enhances the electrical conductivity and thermal compatibility of PrBaFe2O5+δ (PBF). The PBFZ exhibits improved conductivity in the air at intermediate temperatures and good chemical compatibility with electrolytes. The oxygen vacancy formed at the PBFZ lattice due to Zn doping enhances proton defects, resulting in an improved performance by extending the catalytic sites to the whole cathode area. A single cell with a Ni-BZCY anode, PBFZ cathode, and BaZr0.7Ce0.2Y0.1O3-δ (BZCY) electrolyte membrane was successfully fabricated and tested at 550–700 °C. The maximum power density and Rp were enhanced to 513 mW·cm−2 and 0.3 Ω·cm2 at 700 °C, respectively, due to Zn doping.
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