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Title: A highly active hybrid catalyst modified (La0.60Sr0.40)0.95Co0.20Fe0.80O3-δ cathode for proton conducting solid oxide fuel cells

Journal Article · · Journal of Power Sources
ORCiD logo [1];  [2];  [3];  [4];  [1]
  1. Univ. of South Carolina, Columbia, SC (United States). Dept. of Mechanical Engineering
  2. Univ. of South Carolina, Columbia, SC (United States). Dept. of Mechanical Engineering; Yancheng Inst. of Technology (China). Jiangsu Collaborative Innovation Center for Ecological Building Materials and Environmental Protection Equipments
  3. Clemson Univ., SC (United States). Dept. of Materials Science and Engineering
  4. Univ. of South Carolina, Columbia, SC (United States). Dept. of Mechanical Engineering; Zhejiang Normal Univ., Jinhua (China). College of Engineering
+ Show Author Affiliations

The sluggish reaction kinetics in the cathode usually leads to considerable cathode polarization resistance, hindering the development of proton conducting solid oxide fuel cells (H-SOFCs) operated at intermediate temperatures (400–650 °C). In this paper, to address this problem, for the first time, a novel hybrid catalyst consisting of PrNi0.5Mn0.5O3 and PrOx is impregnated in the (La0.60Sr0.40)0.95Co0.20Fe0.80O3-δ (LSCF) cathode of H-SOFCs, resulting in significant enhancement of the cathode reaction kinetics. Single cells with impregnated LSCF cathode and BaZr0.8Y0.2O3 (BZY) electrolyte yield a maximum power density (MPD) of 0.198 W cm-2 at 600 °C, more than doubled of that with blank LSCF cathode (0.083 W cm-2). ECR and EIS studies reveal that the hybrid catalyst can substantially accelerate the oxygen-ion transfer and oxygen dissociation-absorption processes in the cathode, resulting in significantly lower polarization resistance and higher MPD. In addition, the hybrid catalyst possesses good chemical and microstructural stability at 600 °C. Consequently, the single cells with impregnated LSCF cathode show excellent durability. Finally, this study shows that the impregnation of this novel hybrid catalyst in the cathode could be a promising approach to improve the performance and stability of H-SOFCs.

Research Organization:
Univ. of South Carolina, Columbia, SC (United States); Yancheng Inst. of Technology (China); Zhejiang Normal Univ., Jinhua (China)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE); National Natural Science Foundation of China (NSFC); Zhejiang Provincial Natural Science Foundation of China
Grant/Contract Number:
FE0031176; 21406190; LY15E020006
OSTI ID:
1432994
Journal Information:
Journal of Power Sources, Vol. 389; ISSN 0378-7753
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 30 works
Citation information provided by
Web of Science

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Cited By (3)

Progress Report on Proton Conducting Solid Oxide Electrolysis Cells journal July 2019
Effect of Infiltration of Barium Carbonate Nanoparticles on the Electrochemical Performance of La0.6Sr0.4Co0.2Fe0.8O3−δ Cathodes for Protonic Ceramic Fuel Cells journal August 2018
Tuning the defects of the triple conducting oxide BaCo 0.4 Fe 0.4 Zr 0.1 Y 0.1 O 3−δ perovskite toward enhanced cathode activity of protonic ceramic fuel cells journal January 2019

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
solid oxide fuel cells
proton conducting ceramics
LSCF
impregnation