SrCo0.4Fe0.4Zr0.1Y0.1O3-δ, A new CO2 tolerant cathode for proton-conducting solid oxide fuel cells

Xiuqing Lv, Huili Chen, Wei Zhou, Si-Dian Li, Fangqin Cheng and Zongping Shao

Renewable Energy, 2022, vol. 185, issue C, 8-16

Abstract: CO2 poisoning is not a negligible issue for SrCoO3-δ based materials, which limits their application as cathodes for solid oxide fuel cells (SOFCs). In this paper, iron, zirconium, and yttrium were co-doped into SrCoO3-δ to form a structurally stable cubic perovskite material, SrCo0.4Fe0.4Zr0.1Y0.1O3-δ (SCFZY). The CO2 adsorption-desorption on SCFZY was studied via X-ray diffraction and CO2 temperature-programmed desorption. The polarization resistance of the symmetric cell SCFZY|BaZr0.1Ce0.7Y0.1Yb0.1O3-δ (BZCYYb)|SCFZY was tested in air containing 10 vol% CO2 to evaluate the SCFZY's CO2-tolerance as a SOFCs cathode. When applied as a SOFCs cathode in a cell with a proton-conducting electrolyte BZCYYb, SCFZY showed significant CO2-tolerance. The single-cell NiO-BZCYYb|BZCYYb|BZCYYb-SCFZY showed an output with a maximum power density of 679 mW cm−2 at 700 °C and good durability of 500 h. The SCFZY cathode also displayed better CO2-tolerance than the Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) cathode for IT- SOFCs.

Keywords: Solid oxide fuel cells; Cathode; Proton-conducting; CO2 tolerant; Structural stability (search for similar items in EconPapers)
Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:185:y:2022:i:c:p:8-16

DOI: 10.1016/j.renene.2021.12.030

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