Chemical durability of Solid Oxide Fuel Cells: Influence of impurities on long-term performance

Kazunari Sasaki; Kengo Haga; Tomoo Yoshizumi; Daisuke Minematsu; Eiji Yuki; Runru Liu; Chie Uryu; Toshihiro Oshima; Teppei Ogura; Yusuke Shiratori; Kohei Ito; Michihisa Koyama; Katsumi Yokomoto

doi:10.1016/j.jpowsour.2010.09.122

Chemical durability of Solid Oxide Fuel Cells: Influence of impurities on long-term performance

Kazunari Sasaki, Kengo Haga, Tomoo Yoshizumi, Daisuke Minematsu, Eiji Yuki, Runru Liu, Chie Uryu, Toshihiro Oshima, Teppei Ogura, Yusuke Shiratori, Kohei Ito, Michihisa Koyama, Katsumi Yokomoto

Research output: Contribution to journal › Article › peer-review

166 Citations (Scopus)

Abstract

Because of the fuel flexibility of Solid Oxide Fuel Cells (SOFCs), various types of fuels may be applied directly or via a simple reforming process, including hydrocarbons, alcohols, coal gas, biogas, besides hydrogen. However, various types of minor constituents in practical fuels and/or from the system components can cause chemical degradation of SOFCs, such as anode and cathode poisoning phenomena. In this study, we compare the influence of various external impurities, including sulfur, chlorine, phosphorus, boron, and siloxane for anodes, and H₂O and SO₂ for cathodes, on SOFC performance to have a general overview on long-term chemical durability of SOFCs. Chemical compatibility of Ni with foreign species has also been thermochemically considered. Using common model cells, the stability of cell voltage, electrode overpotential, and ohmic loss up to 3000 h has been experimentally examined for H₂-based fuels, for hydrocarbon-based fuels, and for partially pre-reformed CH₄-based fuels. Increase in degradation rate by impurities was verified for various operational parameters. Impurity poisoning mechanisms are discussed for each specific impurity.

Original language	English
Pages (from-to)	9130-9140
Number of pages	11
Journal	Journal of Power Sources
Volume	196
Issue number	22
DOIs	https://doi.org/10.1016/j.jpowsour.2010.09.122
Publication status	Published - Nov 15 2011

All Science Journal Classification (ASJC) codes

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

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10.1016/j.jpowsour.2010.09.122

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title = "Chemical durability of Solid Oxide Fuel Cells: Influence of impurities on long-term performance",

abstract = "Because of the fuel flexibility of Solid Oxide Fuel Cells (SOFCs), various types of fuels may be applied directly or via a simple reforming process, including hydrocarbons, alcohols, coal gas, biogas, besides hydrogen. However, various types of minor constituents in practical fuels and/or from the system components can cause chemical degradation of SOFCs, such as anode and cathode poisoning phenomena. In this study, we compare the influence of various external impurities, including sulfur, chlorine, phosphorus, boron, and siloxane for anodes, and H2O and SO2 for cathodes, on SOFC performance to have a general overview on long-term chemical durability of SOFCs. Chemical compatibility of Ni with foreign species has also been thermochemically considered. Using common model cells, the stability of cell voltage, electrode overpotential, and ohmic loss up to 3000 h has been experimentally examined for H2-based fuels, for hydrocarbon-based fuels, and for partially pre-reformed CH4-based fuels. Increase in degradation rate by impurities was verified for various operational parameters. Impurity poisoning mechanisms are discussed for each specific impurity.",

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AU - Sasaki, Kazunari

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AU - Yoshizumi, Tomoo

AU - Minematsu, Daisuke

AU - Yuki, Eiji

AU - Liu, Runru

AU - Uryu, Chie

AU - Oshima, Toshihiro

AU - Ogura, Teppei

AU - Shiratori, Yusuke

AU - Ito, Kohei

AU - Koyama, Michihisa

AU - Yokomoto, Katsumi

PY - 2011/11/15

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N2 - Because of the fuel flexibility of Solid Oxide Fuel Cells (SOFCs), various types of fuels may be applied directly or via a simple reforming process, including hydrocarbons, alcohols, coal gas, biogas, besides hydrogen. However, various types of minor constituents in practical fuels and/or from the system components can cause chemical degradation of SOFCs, such as anode and cathode poisoning phenomena. In this study, we compare the influence of various external impurities, including sulfur, chlorine, phosphorus, boron, and siloxane for anodes, and H2O and SO2 for cathodes, on SOFC performance to have a general overview on long-term chemical durability of SOFCs. Chemical compatibility of Ni with foreign species has also been thermochemically considered. Using common model cells, the stability of cell voltage, electrode overpotential, and ohmic loss up to 3000 h has been experimentally examined for H2-based fuels, for hydrocarbon-based fuels, and for partially pre-reformed CH4-based fuels. Increase in degradation rate by impurities was verified for various operational parameters. Impurity poisoning mechanisms are discussed for each specific impurity.

AB - Because of the fuel flexibility of Solid Oxide Fuel Cells (SOFCs), various types of fuels may be applied directly or via a simple reforming process, including hydrocarbons, alcohols, coal gas, biogas, besides hydrogen. However, various types of minor constituents in practical fuels and/or from the system components can cause chemical degradation of SOFCs, such as anode and cathode poisoning phenomena. In this study, we compare the influence of various external impurities, including sulfur, chlorine, phosphorus, boron, and siloxane for anodes, and H2O and SO2 for cathodes, on SOFC performance to have a general overview on long-term chemical durability of SOFCs. Chemical compatibility of Ni with foreign species has also been thermochemically considered. Using common model cells, the stability of cell voltage, electrode overpotential, and ohmic loss up to 3000 h has been experimentally examined for H2-based fuels, for hydrocarbon-based fuels, and for partially pre-reformed CH4-based fuels. Increase in degradation rate by impurities was verified for various operational parameters. Impurity poisoning mechanisms are discussed for each specific impurity.

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Chemical durability of Solid Oxide Fuel Cells: Influence of impurities on long-term performance

Abstract

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