By Marta Boaro, Aricò Antonino Salvatore
In this ebook famous specialists spotlight state of the art examine priorities and speak about the state-of-the-art within the box of stable oxide gasoline cells giving an replace on particular matters resembling protonic conductors, interconnects, electrocatalytic and catalytic strategies and modelling approaches.Fundamentals and advances during this box are illustrated to aid younger researchers deal with concerns within the characterization of fabrics and within the research of approaches, rarely tackled in scholarly books.
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Extra info for Advances in Medium and High Temperature Solid Oxide Fuel Cell Technology
The gradient of the Fermi potential will even have the opposite sign of the electrostatic potential gradient across the electrolyte in fuel cell mode (Jacobsen and Mogensen 2008; Mogensen and Jacobsen 2009). The various types of potentials relevant to an electrochemical cell are illustrated in Fig. 3. Fig. 3 Potentials in a solid conductor relative to the outer electric potential in vacuum. leÀ is the electrochemical potential of the electrons and F is the Faraday’s number. The Galvani potential is the same as the electrostatic potential, and the Fermi potential, π, is also called the electromotive potential (Jacobsen et al.
B. dk © CISM International Centre for Mechanical Sciences 2017 M. S. 1007/978-3-319-46146-5_2 31 32 A. B. Mogensen 1 Introduction This chapter describes the electrochemical testing and characterization of electrodes and cells and provides a brief discussion of short stack testing as well. To achieve the maximum obtainable knowledge from testing of electrodes and cells, it is obviously necessary to have a good understanding of the fundamental principles of electrochemistry (Bockris 1970; Holze 2007; Hamann 1998; Greef 1985) and especially solid-state electrochemistry (Kharton 2009, 2011).
Note that there is a potential loss across the electrolyte due to the electrolyte resistance. The potential steps at the interfaces are now smaller compared to the OCV condition in the fuel cell case and larger in the electrolysis case due to the Testing of Electrodes, Cells, and Short Stacks 35 Fig. 2 Electrostatic potential through the electrode-supported cell with a no current, b current load in fuel cell mode, c current load in electrolysis mode, and d the potential across the electrolyte at the “reference” electrode position (thick line) and through the cell part with the current load (thin line).