Electrochemical performance and stability of SrTi0.3Fe0.6Co0.1O3-δ infiltrated La0.8Sr0.2MnO3Zr0.92Y0.16O2-δ oxygen electrodes for intermediate-temperature solid oxide electrochemical cells

doi:10.1016/j.jpowsour.2019.04.044

Title: Electrochemical performance and stability of SrTi _0.3Fe _0.6Co _0.1O _3-δ infiltrated La _0.8Sr _0.2MnO ₃Zr _0.92Y _0.16O _2-δ oxygen electrodes for intermediate-temperature solid oxide electrochemical cells

Abstract

We report that the La _0.8Sr _0.2MnO ₃-Zr _0.92Y _0.16O _2-δ (LSM-YSZ) composite is the most widely used oxygen electrode for solid oxide electrochemical cells (SOCs). However, operating temperatures > 700 degrees C are required for good performance since oxygen reactions are limitied to three-phase boundaries (TPBs) because of poor ionic conductivity of LSM. Furthermore, LSM-YSZ electrodes typically delaminate during electrolysis operation leading to cell degradation. One strategy to improve SOCs with LSM-YSZ electrodes is to infiltrate a mixed ionically and electronically conducting (MIEC) material that promotes oxygen exchange. However, infiltrated materials have a nano-scale structure that may not be stable under SOC operating temperatures. Here, we report results on the infiltration of SrTi _0.3Fe _0.6Co _0.1O _3-δ(STFC), a recently reported high performance MIEC, into LSM-YSZ to improve its electrochemical performance and stability at intermediate temperatures. The infiltrated STFC enhances LSM-YSZ and cell performance, typically yielding a decrease in electrode polarization resistance by a factor > 3 times, resulting in an increase in fuel cell maximum power density and electrolysis current density (at 1.3 V) by a factor > 2 times. Perhaps more significantly, the infiltrated electrodes show good performance stability, with suppression of electrode delamination during electrolysis and nomore »« less

Authors:

Zhang, Shan-Lin ^[1]; Wang, Hongqian ^[2];

^[2];

^[3]; Li, Chang-Jiu ^[3];

^[2]

Northwestern Univ., Evanston, IL (United States); Xi'an Jiaotong Univ., Shaanxi (China)
Northwestern Univ., Evanston, IL (United States)
Xi'an Jiaotong Univ., Shaanxi (China)

Publication Date:: 2019-04-16

Research Org.:: Northwestern Univ., Evanston, IL (United States)

Sponsoring Org.:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Fuel Cell Technologies Office; National Science Foundation (NSF); China Scholarship Council; USDOE Basic Energy Science - Materials Science

OSTI Identifier:: 1599353

Alternate Identifier(s):: OSTI ID: 1547504; OSTI ID: 1658926

Grant/Contract Number:: SC0016965; EE0008079; DMR-1506925; DMR-1545907; DMR-1121262; NNCI-1542205; 201606285002; 51602248; EE450008079

Resource Type:: Journal Article: Accepted Manuscript

Journal Name:: Journal of Power Sources

Additional Journal Information:: Journal Volume: 426; Journal Issue: C; Journal ID: ISSN 0378-7753

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Solid oxide electrochemical cells; Oxygen electrode; Infiltration; Electrochemical performance; Stability

Citation Formats


                    Zhang, Shan-Lin, Wang, Hongqian, Lu, Matthew Y., Li, Cheng-Xin, Li, Chang-Jiu, and Barnett, Scott A. Electrochemical performance and stability of SrTi0.3Fe0.6Co0.1O3-δ infiltrated La0.8Sr0.2MnO3Zr0.92Y0.16O2-δ oxygen electrodes for intermediate-temperature solid oxide electrochemical cells.  United States: N. p., 2019. 
        Web.  doi:10.1016/j.jpowsour.2019.04.044.

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                    Zhang, Shan-Lin, Wang, Hongqian, Lu, Matthew Y., Li, Cheng-Xin, Li, Chang-Jiu, & Barnett, Scott A. Electrochemical performance and stability of SrTi0.3Fe0.6Co0.1O3-δ infiltrated La0.8Sr0.2MnO3Zr0.92Y0.16O2-δ oxygen electrodes for intermediate-temperature solid oxide electrochemical cells.  United States.  doi:10.1016/j.jpowsour.2019.04.044.

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                    Zhang, Shan-Lin, Wang, Hongqian, Lu, Matthew Y., Li, Cheng-Xin, Li, Chang-Jiu, and Barnett, Scott A. Tue .  
        "Electrochemical performance and stability of SrTi0.3Fe0.6Co0.1O3-δ infiltrated La0.8Sr0.2MnO3Zr0.92Y0.16O2-δ oxygen electrodes for intermediate-temperature solid oxide electrochemical cells".  United States.  doi:10.1016/j.jpowsour.2019.04.044.  https://www.osti.gov/servlets/purl/1599353.

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@article{osti_1599353,

  title        = {Electrochemical performance and stability of SrTi0.3Fe0.6Co0.1O3-δ infiltrated La0.8Sr0.2MnO3Zr0.92Y0.16O2-δ oxygen electrodes for intermediate-temperature solid oxide electrochemical cells},

  author       = {Zhang, Shan-Lin and Wang, Hongqian and Lu, Matthew Y. and Li, Cheng-Xin and Li, Chang-Jiu and Barnett, Scott A.},

  abstractNote = {We report that the La0.8Sr0.2MnO3-Zr0.92Y0.16O2-δ (LSM-YSZ) composite is the most widely used oxygen electrode for solid oxide electrochemical cells (SOCs). However, operating temperatures > 700 degrees C are required for good performance since oxygen reactions are limitied to three-phase boundaries (TPBs) because of poor ionic conductivity of LSM. Furthermore, LSM-YSZ electrodes typically delaminate during electrolysis operation leading to cell degradation. One strategy to improve SOCs with LSM-YSZ electrodes is to infiltrate a mixed ionically and electronically conducting (MIEC) material that promotes oxygen exchange. However, infiltrated materials have a nano-scale structure that may not be stable under SOC operating temperatures. Here, we report results on the infiltration of SrTi0.3Fe0.6Co0.1O3-δ(STFC), a recently reported high performance MIEC, into LSM-YSZ to improve its electrochemical performance and stability at intermediate temperatures. The infiltrated STFC enhances LSM-YSZ and cell performance, typically yielding a decrease in electrode polarization resistance by a factor > 3 times, resulting in an increase in fuel cell maximum power density and electrolysis current density (at 1.3 V) by a factor > 2 times. Perhaps more significantly, the infiltrated electrodes show good performance stability, with suppression of electrode delamination during electrolysis and no evidence of coarsening or segregation induced degradation.},

  doi          = {10.1016/j.jpowsour.2019.04.044},

  journal      = {Journal of Power Sources},

  issn         = {0378-7753},

  number       = C,

  volume       = 426,

  place        = {United States},

  year         = {2019},

  month        = {4}

}

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DOI: 10.1016/j.jpowsour.2019.04.044

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Title: Electrochemical performance and stability of SrTi 0.3Fe 0.6Co 0.1O 3-δ infiltrated La 0.8Sr 0.2MnO 3Zr 0.92Y 0.16O 2-δ oxygen electrodes for intermediate-temperature solid oxide electrochemical cells

Abstract

Citation Formats

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