Long-Term Cr Poisoning Effect on LSCF-GDC Composite Cathodes Sintered at Different Temperatures

Xiong, Chunyan; Taillon, Joshua A.; Pellegrinelli, Christopher; Huang, Yi-Lin; Salamanca-Riba, Lourdes G.; Chi, Bo; Jian, Li; Pu, Jian; Wachsman, Eric D.

doi:10.1149/2.0841609jes

Title: Long-Term Cr Poisoning Effect on LSCF-GDC Composite Cathodes Sintered at Different Temperatures

Abstract

Here, the impact of sintering temperature on Cr-poisoning of solid oxide fuel cell (SOFC) cathodes was systematically studied. La_0.6Sr_0.4Fe_0.8Co_0.2O_3-δ - Ce_0.9Gd_0.1O_2-δ symmetric cells were aged at 750°C in synthetic air with the presence of Crofer 22 APU, a common high temperature interconnect, over 200 hours and electrochemical impedance spectroscopy (EIS) was used to determine the degradation process. Both the ohmic resistance (R_Ω) and polarization resistance (R_P) of LSCF-GDC cells, extracted from EIS spectra, for different sintering temperatures increase as a function of aging time. Furthermore, the Cr-related degradation rate increases with decreased cathode sintering temperature. The polarization resistance of cathode sintered at lower temperature (950°C) increases dramatically while aging with the presence of Cr and also significantly decreases the oxygen partial pressure dependence after aging. The degradation rate shows a positive correlation to the concentration of Cr. The results indicate that decreased sintering temperature increases the total surface area, leading to more available sites for Sr-Cr-O nucleation and thus greater Cr degradation.

Authors:

Xiong, Chunyan ^[1]; Taillon, Joshua A. ^[2]; Pellegrinelli, Christopher ^[2]; Huang, Yi-Lin ^[2]; Salamanca-Riba, Lourdes G. ^[2]; Chi, Bo ^[3]; Jian, Li ^[3]; Pu, Jian ^[3]; Wachsman, Eric D. ^[2]

Huazhong Univ. of Science and Technology, Wuhan (China). Center for Fuel Cell Innovation, School of Materials Science and Engineering and State Key Lab. of Material Processing and Die & Mould Technology; Univ. of Maryland, College Park, MD (United States). Univ. of Maryland Energy Research Center (UMERC) and Dept. of Materials Science and Engineering
Univ. of Maryland, College Park, MD (United States). Univ. of Maryland Energy Research Center (UMERC) and Dept. of Materials Science and Engineering
Huazhong Univ. of Science and Technology, Wuhan (China). Center for Fuel Cell Innovation, School of Materials Science and Engineering and State Key Lab. of Material Processing and Die & Mould Technology

Publication Date:: Tue Jul 19 00:00:00 EDT 2016

Research Org.:: Univ. of Maryland, College Park, MD (United States); National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)

Sponsoring Org.:: USDOE Office of Fossil Energy (FE); China Scholarship Council; National Natural Science Foundation of China (NSFC); National Science Foundation (NSF)

OSTI Identifier:: 1438484

Grant/Contract Number:: FE0009084; 51271083; U1134001; DGE 1322106

Resource Type:: Accepted Manuscript

Journal Name:: Journal of the Electrochemical Society

Additional Journal Information:: Journal Volume: 163; Journal Issue: 9; Journal ID: ISSN 0013-4651

Publisher:: The Electrochemical Society

Country of Publication:: United States

Language:: English

Subject:: 30 DIRECT ENERGY CONVERSION; 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; cathode degradation; cathode sintering temperature; Chromium poisoning; Solid Oxide Fuel Cell; strontium compounds

Citation Formats


                    Xiong, Chunyan, Taillon, Joshua A., Pellegrinelli, Christopher, Huang, Yi-Lin, Salamanca-Riba, Lourdes G., Chi, Bo, Jian, Li, Pu, Jian, and Wachsman, Eric D. Long-Term Cr Poisoning Effect on LSCF-GDC Composite Cathodes Sintered at Different Temperatures.  United States: N. p., 2016. 
Web.  doi:10.1149/2.0841609jes.

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                    Xiong, Chunyan, Taillon, Joshua A., Pellegrinelli, Christopher, Huang, Yi-Lin, Salamanca-Riba, Lourdes G., Chi, Bo, Jian, Li, Pu, Jian, & Wachsman, Eric D. Long-Term Cr Poisoning Effect on LSCF-GDC Composite Cathodes Sintered at Different Temperatures.  United States.  https://doi.org/10.1149/2.0841609jes

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                    Xiong, Chunyan, Taillon, Joshua A., Pellegrinelli, Christopher, Huang, Yi-Lin, Salamanca-Riba, Lourdes G., Chi, Bo, Jian, Li, Pu, Jian, and Wachsman, Eric D. Tue .  
"Long-Term Cr Poisoning Effect on LSCF-GDC Composite Cathodes Sintered at Different Temperatures".  United States.  https://doi.org/10.1149/2.0841609jes.  https://www.osti.gov/servlets/purl/1438484.

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@article{osti_1438484,

  title        = {Long-Term Cr Poisoning Effect on LSCF-GDC Composite Cathodes Sintered at Different Temperatures},

  author       = {Xiong, Chunyan and Taillon, Joshua A. and Pellegrinelli, Christopher and Huang, Yi-Lin and Salamanca-Riba, Lourdes G. and Chi, Bo and Jian, Li and Pu, Jian and Wachsman, Eric D.},

  abstractNote = {Here, the impact of sintering temperature on Cr-poisoning of solid oxide fuel cell (SOFC) cathodes was systematically studied. La0.6Sr0.4Fe0.8Co0.2O3-δ - Ce0.9Gd0.1O2-δ symmetric cells were aged at 750°C in synthetic air with the presence of Crofer 22 APU, a common high temperature interconnect, over 200 hours and electrochemical impedance spectroscopy (EIS) was used to determine the degradation process. Both the ohmic resistance (RΩ) and polarization resistance (RP) of LSCF-GDC cells, extracted from EIS spectra, for different sintering temperatures increase as a function of aging time. Furthermore, the Cr-related degradation rate increases with decreased cathode sintering temperature. The polarization resistance of cathode sintered at lower temperature (950°C) increases dramatically while aging with the presence of Cr and also significantly decreases the oxygen partial pressure dependence after aging. The degradation rate shows a positive correlation to the concentration of Cr. The results indicate that decreased sintering temperature increases the total surface area, leading to more available sites for Sr-Cr-O nucleation and thus greater Cr degradation.},

  doi          = {10.1149/2.0841609jes},

  journal      = {Journal of the Electrochemical Society},

  number       = 9,

  volume       = 163,

  place        = {United States},

  year         = {Tue Jul 19 00:00:00 EDT 2016},

  month        = {Tue Jul 19 00:00:00 EDT 2016}

}

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Enhanced electrochemical performance of LSCF cathode through selection of optimum fabrication parameters
journal, September 2017

Muhammed Ali, S. A.; Anwar, Mustafa; Baharuddin, Nurul Akidah
Journal of Solid State Electrochemistry, Vol. 22, Issue 1
DOI: 10.1007/s10008-017-3754-5

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Title: Long-Term Cr Poisoning Effect on LSCF-GDC Composite Cathodes Sintered at Different Temperatures

Abstract

Citation Formats

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