Nonlinear Analysis of Porous La 0.9 Ca 0.1 FeO 3-δ Electrodes in Oxygen Environments
Nonlinear electrochemical impedance spectroscopy (NLEIS) was performed on porous La 0.9 Ca 0.1 FeO 3-δ electrodes at 700, 750, and 800°C and 0.01, 0.21, and 1 atm O 2 . The measured response was compared to a simplified one-dimensional porous electrode model assuming a co-limitation of kinetic and t...
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| Published in | ECS transactions Vol. 58; no. 3; pp. 145 - 152 |
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| Main Authors | , |
| Format | Journal Article |
| Language | English |
| Published |
31.08.2013
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| Online Access | Get full text |
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| Summary: | Nonlinear electrochemical impedance spectroscopy (NLEIS) was performed on porous La
0.9
Ca
0.1
FeO
3-δ
electrodes at 700, 750, and 800°C and 0.01, 0.21, and 1 atm O
2
. The measured response was compared to a simplified one-dimensional porous electrode model assuming a co-limitation of kinetic and transport phenomena. The observed nonlinear trends were inconsistent with a bulk vacancy-only transport pathway or surface thermodynamics held at the independently-measured bulk values. |
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| ISSN: | 1938-5862 1938-6737 |
| DOI: | 10.1149/05803.0145ecst |