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Break Down of Losses in Thin Electrolyte SOFCs

✍ Scribed by R. Barfod; A. Hagen; S. Ramousse; P. V. Hendriksen; M. Mogensen

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
331 KB
Volume
6
Category
Article
ISSN
1615-6846

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✦ Synopsis

Abstract

The contributions of the individual components of the cell (anode, cathode, and electrolyte) to the cell resistance were determined experimentally, directly from impedance spectra obtained from a full cell. It was an anode supported thin electrolyte cell, consisting of a YSZ electrolyte, a Ni/YSZ cermet anode, and a LSM composite cathode. Additional, qualitative information was obtained using symmetric cells with LSM composite electrodes. The investigations were carried out in the temperature interval from 700 to 850 °C. The electrolyte and anode activation energies obtained were 0.9 and 1.1 eV, respectively, which is in relatively good agreement with literature values. The anode resistance was 0.24 Ω cm^2^ and the cathode resistance was 0.58 Ω cm^2^ at 700 °C, corresponding to 23% and 56% of the total resistance, respectively.

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