Citation: Nan Han, Rongzheng Ren, Minjian Ma, Chunming Xu, Jinshuo Qiao, Wang Sun, Kening Sun, Zhenhua Wang. Sn and Y co-doped BaCo_0.6Fe_0.4O_3-δ cathodes with enhanced oxygen reduction activity and CO₂ tolerance for solid oxide fuel cells[J]. Chinese Chemical Letters, ;2022, 33(5): 2658-2662. doi: 10.1016/j.cclet.2021.09.100 shu

Sn and Y co-doped BaCo_0.6Fe_0.4O_3-δ cathodes with enhanced oxygen reduction activity and CO₂ tolerance for solid oxide fuel cells

Beijing Key Laboratory for Chemical Power Source and Green Catalysis, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China

wangzh@bit.edu.cn

Received Date: 9 September 2021
Revised Date: 25 September 2021
Accepted Date: 28 September 2021
Available Online: 2 October 2021

Figures(5)

Applying mixed oxygen ionic and electronic conducting (MIEC) oxides as the cathode offers a promising solution to enhance the performance of solid oxide fuel cells (SOFCs). However, the phase instability in CO₂-containing air and sluggish oxygen reduction activity of MIEC cathodes remain a long-term challenge for optimizing the electrochemical performance of SOFCs. Herein, a heterovalent co-doping strategy is proposed to enhance the oxygen reduction activity and CO₂ tolerance of SOFCs cathodes, which can be demonstrated by developing a novel BaCo_0.6Fe_0.4O_3-δ (BCF)-based MIEC oxide, BaCo_0.6Fe_0.2Sn_0.1Y_0.1O_3-δ (BCFSY). In addition to improving the stability of BCF-based perovskites, this strategy achieves an optimized balance of ionic mobility and oxygen vacancies due to the synergies between the effects of the co-dopants. Compared with single-doped materials, BCFSY exhibits improved CO₂ tolerance and considerably higher ORR activity, which is reflected in a significantly lower polarization resistance of 0.15 Ω cm² at 600 ℃. The results of this work provide an efficient tactic for designing electrode materials for SOFCs.
- Solid oxide fuel cells,
- Cathode,
- Heterovalent co-doping,
- Oxygen ion conduction,
- Oxygen vacancy formation
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沈阳化工大学材料科学与工程学院沈阳 110142

Sn and Y co-doped BaCo0.6Fe0.4O3-δ cathodes with enhanced oxygen reduction activity and CO2 tolerance for solid oxide fuel cells

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通讯作者: 陈斌, bchen63@163.com

Sn and Y co-doped BaCo_0.6Fe_0.4O_3-δ cathodes with enhanced oxygen reduction activity and CO₂ tolerance for solid oxide fuel cells