Journal
CERAMICS INTERNATIONAL
Volume 42, Issue 7, Pages 9311-9314Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.02.121
Keywords
Pr0.6Sr0.4FeO3-delta-Ce0.9Pr0.1O2-delta; One-step electrospin technique; Nanofiber structured cathode; Solid oxide fuel cells
Categories
Funding
- National Natural Science Foundation of China [21576061]
- State Key Laboratory of Urban Water Resource and Environment (Harbin Institute of Technology) [2016DX08]
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In this work, Pr0.6Sr0.4FeO3-delta-Ce0.9Pr0.1O2-delta (PSFO-CPO) nanofibers were synthesized by a one-step electrospin technique for use in intermediate-temperature solid oxide fuel cell (IT-SOFC) applications. PSFO-CPO nanofibers were produced with a diameter of about 100 nm and lengths exceeding tens of microns. The thermal expansion coefficient (TEC) matches with standard GDC electrolytes and the resulting conductivity also satisfies the needs of IT-SOFCs cathodes. EIS analysis of the nanofiber structured electrode gives a polarization resistance of 0.072 Omega cm(2) at 800 degrees C, smaller than that from the powdered cathode with the same composition. The excellent electrochemical performance can be attributed to the well-constructed microstructure of the nanofiber structured cathode, which promotes surface oxygen diffusion and charge transfer processes. All the results imply that the one-step electrospin method is a facile and practical way of improving the cathode properties and that PSFO-CPO is a promising cathode material for IT-SOFCs. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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