Chlorine poisoning of SOFC Ni-cermet anodes

K. Haga; Yusuke Shiratori; Kohei Ito; Kazunari Sasaki

doi:10.1149/1.2980521

Chlorine poisoning of SOFC Ni-cermet anodes

K. Haga, Yusuke Shiratori, Kohei Ito, Kazunari Sasaki

Hydrogen Utilization Engineering

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

50 Citations (Scopus)

Abstract

Poisoning effects by chlorine compounds, including Cl₂ and HCl, to typical electrolyte-supported solid oxide fuel cells (SOFCs) with Ni-scandia-stabilized zirconia cermet anodes have been evaluated. The degradation rate of cell voltage poisoned by 5 ppm Cl₂ was estimated to be ca. 3%1000 h. Chlorine degradation rate increased with increasing Cl ₂ concentration. Microstructural change associated with the formation of nickel nanoparticles on zirconia grains, probably via Ni Cl₂ (g) sublimation, was observed after 150 h poisoning tests, whereas a partial recovery of cell voltage by removing chlorine from the fuels indicates that the chlorine poisoning is partially reversible. Thermochemical calculations, microstructural analysis, and electrochemical characterizations have revealed that the poisoning phenomena for Ni-based cermet anodes caused by chlorine compounds can be explained by the mixed adsorption-type and sublimation-type poisoning mechanism.

Original language	English
Journal	Journal of the Electrochemical Society
Volume	155
Issue number	12
DOIs	https://doi.org/10.1149/1.2980521
Publication status	Published - Nov 4 2008

All Science Journal Classification (ASJC) codes

Electrochemistry
Electronic, Optical and Magnetic Materials
Materials Chemistry
Surfaces, Coatings and Films
Renewable Energy, Sustainability and the Environment
Condensed Matter Physics

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10.1149/1.2980521

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abstract = "Poisoning effects by chlorine compounds, including Cl2 and HCl, to typical electrolyte-supported solid oxide fuel cells (SOFCs) with Ni-scandia-stabilized zirconia cermet anodes have been evaluated. The degradation rate of cell voltage poisoned by 5 ppm Cl2 was estimated to be ca. 3%1000 h. Chlorine degradation rate increased with increasing Cl 2 concentration. Microstructural change associated with the formation of nickel nanoparticles on zirconia grains, probably via Ni Cl2 (g) sublimation, was observed after 150 h poisoning tests, whereas a partial recovery of cell voltage by removing chlorine from the fuels indicates that the chlorine poisoning is partially reversible. Thermochemical calculations, microstructural analysis, and electrochemical characterizations have revealed that the poisoning phenomena for Ni-based cermet anodes caused by chlorine compounds can be explained by the mixed adsorption-type and sublimation-type poisoning mechanism.",

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T1 - Chlorine poisoning of SOFC Ni-cermet anodes

AU - Haga, K.

AU - Shiratori, Yusuke

AU - Ito, Kohei

AU - Sasaki, Kazunari

PY - 2008/11/4

Y1 - 2008/11/4

N2 - Poisoning effects by chlorine compounds, including Cl2 and HCl, to typical electrolyte-supported solid oxide fuel cells (SOFCs) with Ni-scandia-stabilized zirconia cermet anodes have been evaluated. The degradation rate of cell voltage poisoned by 5 ppm Cl2 was estimated to be ca. 3%1000 h. Chlorine degradation rate increased with increasing Cl 2 concentration. Microstructural change associated with the formation of nickel nanoparticles on zirconia grains, probably via Ni Cl2 (g) sublimation, was observed after 150 h poisoning tests, whereas a partial recovery of cell voltage by removing chlorine from the fuels indicates that the chlorine poisoning is partially reversible. Thermochemical calculations, microstructural analysis, and electrochemical characterizations have revealed that the poisoning phenomena for Ni-based cermet anodes caused by chlorine compounds can be explained by the mixed adsorption-type and sublimation-type poisoning mechanism.

AB - Poisoning effects by chlorine compounds, including Cl2 and HCl, to typical electrolyte-supported solid oxide fuel cells (SOFCs) with Ni-scandia-stabilized zirconia cermet anodes have been evaluated. The degradation rate of cell voltage poisoned by 5 ppm Cl2 was estimated to be ca. 3%1000 h. Chlorine degradation rate increased with increasing Cl 2 concentration. Microstructural change associated with the formation of nickel nanoparticles on zirconia grains, probably via Ni Cl2 (g) sublimation, was observed after 150 h poisoning tests, whereas a partial recovery of cell voltage by removing chlorine from the fuels indicates that the chlorine poisoning is partially reversible. Thermochemical calculations, microstructural analysis, and electrochemical characterizations have revealed that the poisoning phenomena for Ni-based cermet anodes caused by chlorine compounds can be explained by the mixed adsorption-type and sublimation-type poisoning mechanism.

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Chlorine poisoning of SOFC Ni-cermet anodes

Abstract

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