The impedance of thin dense oxide cathodes

Bernard A. Boukamp; Nicolas Hildenbrand; Pieter Nammensma; Dave H.A. Blank

doi:10.1016/j.ssi.2010.05.037

The impedance of thin dense oxide cathodes

Bernard A. Boukamp^*, Nicolas Hildenbrand, Pieter Nammensma, Dave H.A. Blank

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

The impedance is derived for a dense layer electrode of a mixed conducting oxide, assuming that the electronic resistance may be ignored. The influence of layer thickness, oxygen diffusion and surface exchange rate on the ‘General Finite Length Diffusion’ expression is evaluated. The thickness dependence is tested for a series of thin, dense layer electrodes of La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) deposited on a Ce0.9Gd0.1O1.95 electrolyte by pulsed laser deposition (PLD). A minimum thickness is required to avoid the influence of contact points of the contacting Pt-gauze and sheet resistance, which is about 1 μm for the studied LSCF electrodes. LEISS surface analysis indicates that PLD deposition process easily leads to a significant Cr contamination of the LSCF surface. Electrochemical impedance spectroscopy analysis indicates that the influence on the exchange rate of this Cr-contamination is still negligible.

Original language	English
Pages (from-to)	404-408
Number of pages	5
Journal	Solid state ionics
Volume	192
Issue number	1
DOIs	https://doi.org/10.1016/j.ssi.2010.05.037
Publication status	Published - 2011

Keywords

2023 OA procedure

UN SDGs

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title = "The impedance of thin dense oxide cathodes",

abstract = "The impedance is derived for a dense layer electrode of a mixed conducting oxide, assuming that the electronic resistance may be ignored. The influence of layer thickness, oxygen diffusion and surface exchange rate on the {\textquoteleft}General Finite Length Diffusion{\textquoteright} expression is evaluated. The thickness dependence is tested for a series of thin, dense layer electrodes of La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) deposited on a Ce0.9Gd0.1O1.95 electrolyte by pulsed laser deposition (PLD). A minimum thickness is required to avoid the influence of contact points of the contacting Pt-gauze and sheet resistance, which is about 1 μm for the studied LSCF electrodes. LEISS surface analysis indicates that PLD deposition process easily leads to a significant Cr contamination of the LSCF surface. Electrochemical impedance spectroscopy analysis indicates that the influence on the exchange rate of this Cr-contamination is still negligible.",

keywords = "2023 OA procedure",

author = "Boukamp, {Bernard A.} and Nicolas Hildenbrand and Pieter Nammensma and Blank, {Dave H.A.}",

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doi = "10.1016/j.ssi.2010.05.037",

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T1 - The impedance of thin dense oxide cathodes

AU - Boukamp, Bernard A.

AU - Hildenbrand, Nicolas

AU - Nammensma, Pieter

AU - Blank, Dave H.A.

PY - 2011

Y1 - 2011

N2 - The impedance is derived for a dense layer electrode of a mixed conducting oxide, assuming that the electronic resistance may be ignored. The influence of layer thickness, oxygen diffusion and surface exchange rate on the ‘General Finite Length Diffusion’ expression is evaluated. The thickness dependence is tested for a series of thin, dense layer electrodes of La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) deposited on a Ce0.9Gd0.1O1.95 electrolyte by pulsed laser deposition (PLD). A minimum thickness is required to avoid the influence of contact points of the contacting Pt-gauze and sheet resistance, which is about 1 μm for the studied LSCF electrodes. LEISS surface analysis indicates that PLD deposition process easily leads to a significant Cr contamination of the LSCF surface. Electrochemical impedance spectroscopy analysis indicates that the influence on the exchange rate of this Cr-contamination is still negligible.

AB - The impedance is derived for a dense layer electrode of a mixed conducting oxide, assuming that the electronic resistance may be ignored. The influence of layer thickness, oxygen diffusion and surface exchange rate on the ‘General Finite Length Diffusion’ expression is evaluated. The thickness dependence is tested for a series of thin, dense layer electrodes of La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) deposited on a Ce0.9Gd0.1O1.95 electrolyte by pulsed laser deposition (PLD). A minimum thickness is required to avoid the influence of contact points of the contacting Pt-gauze and sheet resistance, which is about 1 μm for the studied LSCF electrodes. LEISS surface analysis indicates that PLD deposition process easily leads to a significant Cr contamination of the LSCF surface. Electrochemical impedance spectroscopy analysis indicates that the influence on the exchange rate of this Cr-contamination is still negligible.

KW - 2023 OA procedure

U2 - 10.1016/j.ssi.2010.05.037

DO - 10.1016/j.ssi.2010.05.037

M3 - Article

SN - 0167-2738

VL - 192

SP - 404

EP - 408

JO - Solid state ionics

JF - Solid state ionics

IS - 1

ER -

The impedance of thin dense oxide cathodes

Abstract

Keywords

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