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Title: A highly scalable spray coating technique for electrode infiltration: Barium carbonate infiltrated La 0.6Sr 0.4Co 0.2Fe 0.8O 3-δ perovskite structured electrocatalyst with demonstrated long term durability

Abstract

Barium carbonate (BaCO 3) nanoparticles have demonstrated excellent catalytic activity for the oxygen reduction reaction by spray coating onto La 0.6Sr 0.4Co 0.2Fe 0.8O 3-δ (LSCF) and LSCF-SDC (Sm 0.2Ce 0.8O 2-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, BaCO 3 nano-particles exhibited significant interfacial contact with LSCF particles by the spray coating technique. As a result, the polarization resistance of BaCO 3 infiltrated LSCF was reduced from 2.5 to 1.2 Ωcm 2 at 700 °C. In addition, commercial full cell SOFCs with BaCO 3 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 BaCO 3 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 (BaCO 3) 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. doi: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. doi: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 = {2017},
month = {9}
}

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