LaCoO3-δ coated Ba0.5Sr0.5Co0.8Fe0.2O3-δ cathode for intermediate temperature solid oxide fuel cells

doi:10.1016/j.electacta.2019.07.054

Title: LaCoO_3-δ coated Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3-δ cathode for intermediate temperature solid oxide fuel cells

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Abstract

Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3-δ (BSCF) is a promising cathode for intermediate temperature solid oxide fuel cells. Yet, BSCF cathode performance stability has been a challenge and its electrochemical performance deteriorates severely in the presence of Cr2O3-forming metallic interconnect. We demonstrate that LaCoO_3-δ (LC) coating on BSCF cathode can not only enhance BSCF electrochemical performance, but also effectively improve the BSCF performance stability. Here, LC-coated BSCF-Gd_0.1Ce_0.9O_1.9 (LC@BSCF-GDC) cathode is prepared through a solution impregnation method and systematically characterized. EIS, XRD, Raman, SEM and EDS tests with and without SUS430 interconnect are conducted to characterize the Cr-tolerance. The results reflect that BSCF-GDC cathode is susceptible to Cr poisoning while LC@BSCF-GDC cathode has significantly enhanced tolerance to Cr poisoning. Single cells with LC@BSCF-GDC cathode achieve higher peak power density and smaller polarization resistance values than that of single cells with BSCF-GDC cathode. Furthermore, significant improvement of performance stability under a constant current load has been achieved for single cells with LC@BSCF-GDC cathode. This work provides a new solution for solving BSCF cathode performance stability.

Authors:

Qiu, Peng ^[1]; Li, Jin ^[2]; Jia, Lichao ^[3]; Chi, Bo ^[3]; Pu, Jian ^[3]; Li, Jian ^[3]; Chen, Fanglin ^[4]

Huazhong Univ. of Science and Technology, Wuhan (China); Univ. of South Carolina, Columbia, SC (United States)
Hubei Univ., Wuhan (China)
Huazhong Univ. of Science and Technology, Wuhan (China)
Univ. of South Carolina, Columbia, SC (United States)

Publication Date:: 2019-07-19

Research Org.:: Univ. of South Carolina, Columbia, SC (United States)

Sponsoring Org.:: USDOE Office of Fossil Energy (FE); National Natural Science Foundation of China (NNSFC)

OSTI Identifier:: 1545481

Grant/Contract Number:: FE0031176

Resource Type:: Accepted Manuscript

Journal Name:: Electrochimica Acta

Additional Journal Information:: Journal Volume: 319; Journal Issue: C; Journal ID: ISSN 0013-4686

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 25 ENERGY STORAGE; BSCF; IT-SOFC; Metallic interconnect; Coating; Cr-tolerance

Citation Formats


                    Qiu, Peng, Li, Jin, Jia, Lichao, Chi, Bo, Pu, Jian, Li, Jian, and Chen, Fanglin. LaCoO3-δ coated Ba0.5Sr0.5Co0.8Fe0.2O3-δ cathode for intermediate temperature solid oxide fuel cells.  United States: N. p., 2019. 
        Web.  doi:10.1016/j.electacta.2019.07.054.

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                    Qiu, Peng, Li, Jin, Jia, Lichao, Chi, Bo, Pu, Jian, Li, Jian, & Chen, Fanglin. LaCoO3-δ coated Ba0.5Sr0.5Co0.8Fe0.2O3-δ cathode for intermediate temperature solid oxide fuel cells.  United States.  doi:10.1016/j.electacta.2019.07.054.

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                    Qiu, Peng, Li, Jin, Jia, Lichao, Chi, Bo, Pu, Jian, Li, Jian, and Chen, Fanglin. Fri .  
        "LaCoO3-δ coated Ba0.5Sr0.5Co0.8Fe0.2O3-δ cathode for intermediate temperature solid oxide fuel cells".  United States.  doi:10.1016/j.electacta.2019.07.054.  https://www.osti.gov/servlets/purl/1545481.

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@article{osti_1545481,

  title        = {LaCoO3-δ coated Ba0.5Sr0.5Co0.8Fe0.2O3-δ cathode for intermediate temperature solid oxide fuel cells},

  author       = {Qiu, Peng and Li, Jin and Jia, Lichao and Chi, Bo and Pu, Jian and Li, Jian and Chen, Fanglin},

  abstractNote = {Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) is a promising cathode for intermediate temperature solid oxide fuel cells. Yet, BSCF cathode performance stability has been a challenge and its electrochemical performance deteriorates severely in the presence of Cr2O3-forming metallic interconnect. We demonstrate that LaCoO3-δ (LC) coating on BSCF cathode can not only enhance BSCF electrochemical performance, but also effectively improve the BSCF performance stability. Here, LC-coated BSCF-Gd0.1Ce0.9O1.9 (LC@BSCF-GDC) cathode is prepared through a solution impregnation method and systematically characterized. EIS, XRD, Raman, SEM and EDS tests with and without SUS430 interconnect are conducted to characterize the Cr-tolerance. The results reflect that BSCF-GDC cathode is susceptible to Cr poisoning while LC@BSCF-GDC cathode has significantly enhanced tolerance to Cr poisoning. Single cells with LC@BSCF-GDC cathode achieve higher peak power density and smaller polarization resistance values than that of single cells with BSCF-GDC cathode. Furthermore, significant improvement of performance stability under a constant current load has been achieved for single cells with LC@BSCF-GDC cathode. This work provides a new solution for solving BSCF cathode performance stability.},

  doi          = {10.1016/j.electacta.2019.07.054},

  journal      = {Electrochimica Acta},

  number       = C,

  volume       = 319,

  place        = {United States},

  year         = {2019},

  month        = {7}

}

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DOI: 10.1016/j.electacta.2019.07.054

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Title: LaCoO3-δ coated Ba0.5Sr0.5Co0.8Fe0.2O3-δ cathode for intermediate temperature solid oxide fuel cells

Abstract

Citation Formats

Title: LaCoO_3-δ coated Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3-δ cathode for intermediate temperature solid oxide fuel cells