Tin doped PrBaFe2O5+δ anode material for solid oxide fuel cells
Abstract
Ceramic anodes have many advantages over cermet anodes for solid oxide fuel cells. We report the synthesis and characterization of Sn doped double perovskite PrBaFe(2-x)SnxO5+δ (x = 0–0.3) anode materials. Different crystal structures were observed depending on the Sn doping level and gas atmosphere. The materials demonstrated excellent stability in both reducing and redox atmospheres at elevated temperatures. The oxygen content in the as-prepared PrBaFe(2-x)SnxO5+δ was nonlinearly correlated to the Sn doping level and reached maximum values around x = 0.1. After the reducing treatment, the oxygen content linearly decreased with increasing Sn doping level. The electrical conductivity of bulk PrBaFe(2-x)SnxO5+δ (x = 0.1) reached 63.6 S cm-1 at 800 °C in humidified hydrogen. At 750 °C, the surface exchange coefficient and bulk diffusivity of PrBaFe(2-x)SnxO5+δ reached the maximum values of 4.42 × 10-6 m s-1 and 6.04 × 10-7 m2 s-1, respectively, in the reducing process when the Sn doping level was x = 0.1. The activation energies of surface exchange coefficient and bulk diffusivity of PrBaFe(2-x)SnxO5+δ (x = 0.1) were 0.22 eV and 0.16 eV, respectively, in the reducing process. The area specific resistance of the PrBaFe(2-x)SnxO5+δ (x = 0.1) anode was 0.095–0.285 Ω cm2 from 850–750 °Cmore »
- Authors:
-
[1];
[1]
- Univ. of South Carolina, Columbia, SC (United States). Dept. of Mechanical Engineering
- Publication Date:
- Research Org.:
- Univ. of South Carolina, Columbia, SC (United States)
- Sponsoring Org.:
- USDOE Office of Fossil Energy (FE)
- OSTI Identifier:
- 1427993
- Grant/Contract Number:
- FE0024059
- Resource Type:
- Accepted Manuscript
- Journal Name:
- RSC Advances
- Additional Journal Information:
- Journal Volume: 7; Journal Issue: 37; Journal ID: ISSN 2046-2069
- Publisher:
- Royal Society of Chemistry
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Dong, Guohui, Yang, Chunyang, He, Fei, Jiang, Yanmei, Ren, Chunlei, Gan, Yun, Lee, Myongjin, and Xue, Xingjian. Tin doped PrBaFe2O5+δ anode material for solid oxide fuel cells. United States: N. p., 2017.
Web. doi:10.1039/c7ra03143b.
Dong, Guohui, Yang, Chunyang, He, Fei, Jiang, Yanmei, Ren, Chunlei, Gan, Yun, Lee, Myongjin, & Xue, Xingjian. Tin doped PrBaFe2O5+δ anode material for solid oxide fuel cells. United States. https://doi.org/10.1039/c7ra03143b
Dong, Guohui, Yang, Chunyang, He, Fei, Jiang, Yanmei, Ren, Chunlei, Gan, Yun, Lee, Myongjin, and Xue, Xingjian. Tue .
"Tin doped PrBaFe2O5+δ anode material for solid oxide fuel cells". United States. https://doi.org/10.1039/c7ra03143b. https://www.osti.gov/servlets/purl/1427993.
@article{osti_1427993,
title = {Tin doped PrBaFe2O5+δ anode material for solid oxide fuel cells},
author = {Dong, Guohui and Yang, Chunyang and He, Fei and Jiang, Yanmei and Ren, Chunlei and Gan, Yun and Lee, Myongjin and Xue, Xingjian},
abstractNote = {Ceramic anodes have many advantages over cermet anodes for solid oxide fuel cells. We report the synthesis and characterization of Sn doped double perovskite PrBaFe(2-x)SnxO5+δ (x = 0–0.3) anode materials. Different crystal structures were observed depending on the Sn doping level and gas atmosphere. The materials demonstrated excellent stability in both reducing and redox atmospheres at elevated temperatures. The oxygen content in the as-prepared PrBaFe(2-x)SnxO5+δ was nonlinearly correlated to the Sn doping level and reached maximum values around x = 0.1. After the reducing treatment, the oxygen content linearly decreased with increasing Sn doping level. The electrical conductivity of bulk PrBaFe(2-x)SnxO5+δ (x = 0.1) reached 63.6 S cm-1 at 800 °C in humidified hydrogen. At 750 °C, the surface exchange coefficient and bulk diffusivity of PrBaFe(2-x)SnxO5+δ reached the maximum values of 4.42 × 10-6 m s-1 and 6.04 × 10-7 m2 s-1, respectively, in the reducing process when the Sn doping level was x = 0.1. The activation energies of surface exchange coefficient and bulk diffusivity of PrBaFe(2-x)SnxO5+δ (x = 0.1) were 0.22 eV and 0.16 eV, respectively, in the reducing process. The area specific resistance of the PrBaFe(2-x)SnxO5+δ (x = 0.1) anode was 0.095–0.285 Ω cm2 from 850–750 °C in humidified hydrogen, better than or comparable to the best ceramic anodes in the literature.},
doi = {10.1039/c7ra03143b},
journal = {RSC Advances},
number = 37,
volume = 7,
place = {United States},
year = {Tue Apr 25 00:00:00 EDT 2017},
month = {Tue Apr 25 00:00:00 EDT 2017}
}
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