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Title: A highly scalable spray coating technique for electrode infiltration: Barium carbonate infiltrated La0.6Sr0.4Co0.2Fe0.8O3-δ perovskite structured electrocatalyst with demonstrated long term durability

Abstract

Barium carbonate (BaCO3) nanoparticles have demonstrated excellent catalytic activity for the oxygen reduction reaction by spray coating onto La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) and LSCF-SDC (Sm0.2Ce0.8O2-δ) cathode materials. In this work, barium acetate solutions were modified by a surfactant to lower the surface tension and decrease the contact angle on LSCF which is a benefit for the infiltration process. In the LSCF electrode, BaCO3 nano-particles exhibited significant interfacial contact with LSCF particles by the spray coating technique. As a result, the polarization resistance of BaCO3 infiltrated LSCF was reduced from 2.5 to 1.2 Ωcm2 at 700 °C. In addition, commercial full cell SOFCs with BaCO3 infiltrated LSCF-SDC cathodes also demonstrated higher performance due to the reduced cathode resistance. At 750 °C, the electrode overpotential of the BaCO3 infiltrated cell was much lower than that of baseline cell during long term testing (500 hours). The polarization resistance of the BaCO3 infiltrated LSCF-SDC electrode only increased by 1.6% after 500 hours. This work demonstrated a highly scalable spray coating process of a promising electrocatalyst (BaCO3) with excellent long-term stability for the oxygen reduction reaction.

Authors:
 [1];  [2];  [3]; ORCiD logo [1]
  1. Clemson Univ., SC (United States)
  2. National Energy Technology Lab. (NETL), Morgantown, WV (United States); AECOM, Morgantown, WV (United States)
  3. National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States); Carnegie Mellon Univ., Pittsburgh, PA (United States)
Publication Date:
Research Org.:
National Energy Technology Lab. (NETL), Morgantown, WV (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1482349
Alternate Identifier(s):
OSTI ID: 1549926
Grant/Contract Number:  
14-6357
Resource Type:
Accepted Manuscript
Journal Name:
International Journal of Hydrogen Energy
Additional Journal Information:
Journal Volume: 42; Journal Issue: 39; Journal ID: ISSN 0360-3199
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Hong, Tao, Lee, Shiwoo, Ohodnicki, Paul, and Brinkman, Kyle. A highly scalable spray coating technique for electrode infiltration: Barium carbonate infiltrated La0.6Sr0.4Co0.2Fe0.8O3-δ perovskite structured electrocatalyst with demonstrated long term durability. United States: N. p., 2017. Web. doi:10.1016/j.ijhydene.2017.08.091.
Hong, Tao, Lee, Shiwoo, Ohodnicki, Paul, & Brinkman, Kyle. A highly scalable spray coating technique for electrode infiltration: Barium carbonate infiltrated La0.6Sr0.4Co0.2Fe0.8O3-δ perovskite structured electrocatalyst with demonstrated long term durability. United States. https://doi.org/10.1016/j.ijhydene.2017.08.091
Hong, Tao, Lee, Shiwoo, Ohodnicki, Paul, and Brinkman, Kyle. Fri . "A highly scalable spray coating technique for electrode infiltration: Barium carbonate infiltrated La0.6Sr0.4Co0.2Fe0.8O3-δ perovskite structured electrocatalyst with demonstrated long term durability". United States. https://doi.org/10.1016/j.ijhydene.2017.08.091. https://www.osti.gov/servlets/purl/1482349.
@article{osti_1482349,
title = {A highly scalable spray coating technique for electrode infiltration: Barium carbonate infiltrated La0.6Sr0.4Co0.2Fe0.8O3-δ perovskite structured electrocatalyst with demonstrated long term durability},
author = {Hong, Tao and Lee, Shiwoo and Ohodnicki, Paul and Brinkman, Kyle},
abstractNote = {Barium carbonate (BaCO3) nanoparticles have demonstrated excellent catalytic activity for the oxygen reduction reaction by spray coating onto La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) and LSCF-SDC (Sm0.2Ce0.8O2-δ) cathode materials. In this work, barium acetate solutions were modified by a surfactant to lower the surface tension and decrease the contact angle on LSCF which is a benefit for the infiltration process. In the LSCF electrode, BaCO3 nano-particles exhibited significant interfacial contact with LSCF particles by the spray coating technique. As a result, the polarization resistance of BaCO3 infiltrated LSCF was reduced from 2.5 to 1.2 Ωcm2 at 700 °C. In addition, commercial full cell SOFCs with BaCO3 infiltrated LSCF-SDC cathodes also demonstrated higher performance due to the reduced cathode resistance. At 750 °C, the electrode overpotential of the BaCO3 infiltrated cell was much lower than that of baseline cell during long term testing (500 hours). The polarization resistance of the BaCO3 infiltrated LSCF-SDC electrode only increased by 1.6% after 500 hours. This work demonstrated a highly scalable spray coating process of a promising electrocatalyst (BaCO3) with excellent long-term stability for the oxygen reduction reaction.},
doi = {10.1016/j.ijhydene.2017.08.091},
journal = {International Journal of Hydrogen Energy},
number = 39,
volume = 42,
place = {United States},
year = {Fri Sep 08 00:00:00 EDT 2017},
month = {Fri Sep 08 00:00:00 EDT 2017}
}

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Cited by: 18 works
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