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Electrocatalysis

, Volume 7, Issue 4, pp 280–286 | Cite as

Investigation of Electrochemical Properties of Model Lanthanum Strontium Cobalt Ferrite-Based Cathodes for Proton Ceramic Fuel Cells

  • Chung-Yul YooEmail author
  • Dae Sik Yun
  • Sun-Young Park
  • Jaeku Park
  • Jong Hoon Joo
  • Haein Park
  • Minseok Kwak
  • Ji Haeng Yu
Original Research

Abstract

The electrochemical properties of La0.6Sr0.4Co0.2Fe0.8O3-δ-based cathodes are studied as model electrodes for proton ceramic fuel cells. The electrochemical performance of symmetric cells with porous cathodes (La0.6Sr0.4Co0.2Fe0.8O3-δ, La0.6Sr0.4Co0.2Fe0.8O3-δ–BaCe0.9Y0.1O3-δ, and La0.6Sr0.4Co0.2Fe0.8O3-δ–BaZr0.8Y0.2O3-δ), investigated as a function of oxygen and water partial pressures, follows the order La0.6Sr0.4Co0.2Fe0.8O3-δ–BaCe0.9Y0.1O3-δ ≥ La0.6Sr0.4Co0.2Fe0.8O3-δ >> La0.6Sr0.4Co0.2Fe0.8O3-δ–BaZr0.8Y0.2O3-δ. The results indicate that the cathode performance of La0.6Sr0.4Co0.2Fe0.8O3-δ–BaCe0.9Y0.1O3-δ is enhanced mainly due to the extension of the effective triple phase boundary, whereas that of La0.6Sr0.4Co0.2Fe0.8O3-δ–BaZr0.8Y0.2O3-δ is lowered due to the poor proton conductivity along the percolated BaZr0.8Y0.2O3-δ particles. From the observed oxygen partial pressure dependence, the rate-determining step of the above cathode polarization reaction is principally ascribed to the oxygen reduction reaction.

Graphical abstract

Schematics of the cathode reaction mechanism at the surface of the LSCF, LSCF-BCY, and LSCFBZY cathodes

Keywords

Proton ceramic fuel cell Composite cathode Proton-conducting phase Electrochemical reaction 

Notes

Acknowledgments

This work was conducted under the framework of the Research and Development Program of the Korea Institute of Energy Research (KIER) (B6-2456-01). This research was also supported by the C1 Gas Refinery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (2015M3D3A1A01064928). Jong Hyun Park (Chungnam National University) and Hyejin Yu (Pukyong National University) are gratefully acknowledged for experimental supports and fruitful discussions.

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.Korea Institute of Energy ResearchDaejeonRepublic of Korea
  2. 2.SsangYong Materials CorporationDaeguRepublic of Korea
  3. 3.Pohang Accelerator LaboratoryPohangRepublic of Korea
  4. 4.Department of Advanced Material EngineeringChungbuk National UniversityCheongjuRepublic of Korea
  5. 5.Department of ChemistryPukyong National UniversityBusanRepublic of Korea

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