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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

Abstract

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.

Authors:
 [1];  [2]; ORCiD logo [2]; ORCiD logo [3];  [3]; ORCiD logo [2]
  1. Northwestern Univ., Evanston, IL (United States); Xi'an Jiaotong Univ., Shaanxi (China)
  2. Northwestern Univ., Evanston, IL (United States)
  3. Xi'an Jiaotong Univ., Shaanxi (China)
Publication Date:
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:
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.
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. https://doi.org/10.1016/j.jpowsour.2019.04.044
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. https://doi.org/10.1016/j.jpowsour.2019.04.044. https://www.osti.gov/servlets/purl/1599353.
@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},
number = C,
volume = 426,
place = {United States},
year = {2019},
month = {4}
}

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Works referencing / citing this record:

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