Effect of microstructure on ionic conduction of Composite Electrolytes consisting of doped ceria and carbonates

K. Z. Fung, C. T. Ni, S. Y. Tsai, J. Y. Tang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Composite Electrolytes consisting of oxygen ion conductors and carbonates have received great attention for fuel cell application. The enhanced conduction was observed due to coionic(O=/H+) conduction during fuel cell operation under the H2/air atmosphere. It is believed that highly mobile ions at the interface between doped ceria and carbonates may contribute to the high conductivity of the composite electrolyte. Thus, the electrical conduction of composite electrolytes with various types of microstructures was evaluated at temperatures ranging from 300 °C to 700 °C. For powder mixture, the composite samples were prepared by direct mixing of doped ceria and carbonate powders. For infiltrated composite, the carbonates were infiltrated into porous ceria substrates at 600°C. SEM, XRD, and Electrochemical Impedance Spectroscopy were employed to conduct microstructural, structural and impedance analyses. The electrical conduction behavior of composite electrolytes will be rationalized based on the pore size, pore distribution and interface area.

Original languageEnglish
Title of host publicationECS Transactions
EditorsT. Kawada, S. C. Singhal
PublisherElectrochemical Society Inc.
Pages371-376
Number of pages6
Edition1
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - 2017 May 30
Event15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 - Hollywood, United States
Duration: 2017 Jul 232017 Jul 28

Publication series

NameECS Transactions
Number1
Volume78
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017
CountryUnited States
CityHollywood
Period17-07-2317-07-28

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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