Fermi Potential across Working Solid Oxide Cells with Zirconia or Ceria Electrolytes

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Abstract

Two kinds of electrochemical relevant potentials are important in order to describe several observed phenomena in operating electrochemical cells with solid electrolytes. This paper gives illustrative examples of how the profiles of the two potential types, the Galvani potential, φ, and the electromotive – also called the Fermi potential, π, will vary across the electrolyte, and of how the electron leak current density though the electrolyte, which is related to π, will be affected by temperature and cell voltage across the electrolyte in cells based on gadolinia doped ceria (CGO) and on yttria stabilized zirconia (YSZ) electrolytes. The nature of the two potential types and the importance of each of them for the cell operation are explained.
Original languageEnglish
JournalE C S Transactions
Volume61
Issue number1
Pages (from-to)203-214
ISSN1938-5862
DOIs
Publication statusPublished - 2014
Event225th ECS Meeting - Orlando, FL, United States
Duration: 11 May 201415 May 2014
Conference number: 225

Conference

Conference225th ECS Meeting
Number225
CountryUnited States
CityOrlando, FL
Period11/05/201415/05/2014

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