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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

Journal Article · · International Journal of Hydrogen Energy
 [1];  [2];  [3];  [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)
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.
Research Organization:
National Energy Technology Lab. (NETL), Morgantown, WV (United States)
Sponsoring Organization:
USDOE
OSTI ID:
1482349
Alternate ID(s):
OSTI ID: 1549926
Journal Information:
International Journal of Hydrogen Energy, Journal Name: International Journal of Hydrogen Energy Journal Issue: 39 Vol. 42; ISSN 0360-3199
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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