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Title: A new composite cathode for intermediate temperature solid oxide fuel cells with zirconia-based electrolytes

Abstract

Improving the electrocatalytic activity of electrode materials is vitally important to achieve practically meaningful performance for intermediate temperature solid oxide fuel cells (IT-SOFCs). Here the present work develops a composite cathode consisting of an electronic conductor Sr-doped LaMnO3 (LSM) and an ionic conductor Y- and Ce- co-doped Bi2O3 (BYC7). BYC7 is an excellent oxide-ion conductor, exhibiting a high and stable ionic conductivity of 0.008 S cm-1 at 500 °C. The polarization resistance of LSM-BYC7 cathode in a symmetrical cell with doped ZrO2 as electrolyte varies from 5.76 at 500 °C to 0.25 Ω cm2 at 650 °C. The surface diffusion and charge transfer at the triple phase boundaries are the rate determining steps based on the dependence of polarization resistance on partial pressure of oxygen. The maximum power density of a ZrO2-based anode-supported cell with LSM-BYC7 composite cathode is 56.4, 154.6, 327.9, and 451.0 mW cm-2 at 500, 550, 600, and 650 °C respectively. AC impedance analysis reveals that the performance of IT-SOFC prepared in this study is actually limited by the anode, not by LSM-BYC7 cathode.

Authors:
 [1]; ORCiD logo [1]
  1. University of South Carolina, Columbia, SC (United States)
Publication Date:
Research Org.:
Univ. of South Carolina, Columbia, SC (United States)
Sponsoring Org.:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
OSTI Identifier:
1534047
Alternate Identifier(s):
OSTI ID: 1397401
Grant/Contract Number:  
AR0000492
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Power Sources
Additional Journal Information:
Journal Volume: 342; Journal Issue: C; Journal ID: ISSN 0378-7753
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; intermediate temperature solid oxide fuel cells; composite cathode; bismuth oxide; lanthanum manganese oxide; AC impedance

Citation Formats

Zhang, Cuijuan, and Huang, Kevin. A new composite cathode for intermediate temperature solid oxide fuel cells with zirconia-based electrolytes. United States: N. p., 2016. Web. doi:10.1016/j.jpowsour.2016.12.084.
Zhang, Cuijuan, & Huang, Kevin. A new composite cathode for intermediate temperature solid oxide fuel cells with zirconia-based electrolytes. United States. https://doi.org/10.1016/j.jpowsour.2016.12.084
Zhang, Cuijuan, and Huang, Kevin. Mon . "A new composite cathode for intermediate temperature solid oxide fuel cells with zirconia-based electrolytes". United States. https://doi.org/10.1016/j.jpowsour.2016.12.084. https://www.osti.gov/servlets/purl/1534047.
@article{osti_1534047,
title = {A new composite cathode for intermediate temperature solid oxide fuel cells with zirconia-based electrolytes},
author = {Zhang, Cuijuan and Huang, Kevin},
abstractNote = {Improving the electrocatalytic activity of electrode materials is vitally important to achieve practically meaningful performance for intermediate temperature solid oxide fuel cells (IT-SOFCs). Here the present work develops a composite cathode consisting of an electronic conductor Sr-doped LaMnO3 (LSM) and an ionic conductor Y- and Ce- co-doped Bi2O3 (BYC7). BYC7 is an excellent oxide-ion conductor, exhibiting a high and stable ionic conductivity of 0.008 S cm-1 at 500 °C. The polarization resistance of LSM-BYC7 cathode in a symmetrical cell with doped ZrO2 as electrolyte varies from 5.76 at 500 °C to 0.25 Ω cm2 at 650 °C. The surface diffusion and charge transfer at the triple phase boundaries are the rate determining steps based on the dependence of polarization resistance on partial pressure of oxygen. The maximum power density of a ZrO2-based anode-supported cell with LSM-BYC7 composite cathode is 56.4, 154.6, 327.9, and 451.0 mW cm-2 at 500, 550, 600, and 650 °C respectively. AC impedance analysis reveals that the performance of IT-SOFC prepared in this study is actually limited by the anode, not by LSM-BYC7 cathode.},
doi = {10.1016/j.jpowsour.2016.12.084},
journal = {Journal of Power Sources},
number = C,
volume = 342,
place = {United States},
year = {Mon Dec 26 00:00:00 EST 2016},
month = {Mon Dec 26 00:00:00 EST 2016}
}

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Cited by: 23 works
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