Impedance of thin film cathodes: thickness and current collector dependence

Bernard A. Boukamp; Nicolas Hildenbrand; Henny J.M. Bouwmeester; Dave H.A. Blank

doi:10.1016/j.ssi.2015.10.013

Impedance of thin film cathodes: thickness and current collector dependence

Bernard A. Boukamp^*
, Nicolas Hildenbrand
, Henny J.M. Bouwmeester
, Dave H.A. Blank

^*Corresponding author for this work

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

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Abstract

The influence of the layer thickness of mixed ionic–electronic conducting (MIEC) cathodes and the type of noble metal current collector on the apparent surface exchange resistance is studied with impedance spectroscopy. The impedance data is analyzed with the ‘General Finite Length Diffusion’ transfer function. Also a simple relation is derived for the influence of the electronic sheet resistance of a thin layer on the apparent exchange resistance. These analysis methods are applied to a set 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). The apparent chemical capacitance is used to check the reliability of obtaining the oxygen exchange rate from the layer resistance. Use of a fresh, clean platinum gauze current collector significantly enhances the surface oxygen exchange rate on LSCF. But both ‘noble metal’ current collectors, Pt and Au, cannot be considered to be inert on LSCF.

Original language	English
Pages (from-to)	81-90
Number of pages	10
Journal	Solid state ionics
Volume	283
DOIs	https://doi.org/10.1016/j.ssi.2015.10.013
Publication status	Published - 2015

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Keywords

2023 OA procedure

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10.1016/j.ssi.2015.10.013

ArticleFinal published version, 1.56 MBLicence: Taverne

Impedance of thin-film cathodes: thickness and current collector dependence
Boukamp, B. A., Hildenbrand, N., Yoo, C.-Y., Bouwmeester, H. J. M. & Blank, D. H. A., 2 Jun 2013. 1 p.
Research output: Contribution to conference › Poster › Other research output

Cite this

@article{494be1a1482c42fa98035aeff8d23c97,

title = "Impedance of thin film cathodes: thickness and current collector dependence",

abstract = "The influence of the layer thickness of mixed ionic–electronic conducting (MIEC) cathodes and the type of noble metal current collector on the apparent surface exchange resistance is studied with impedance spectroscopy. The impedance data is analyzed with the {\textquoteleft}General Finite Length Diffusion{\textquoteright} transfer function. Also a simple relation is derived for the influence of the electronic sheet resistance of a thin layer on the apparent exchange resistance. These analysis methods are applied to a set 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). The apparent chemical capacitance is used to check the reliability of obtaining the oxygen exchange rate from the layer resistance. Use of a fresh, clean platinum gauze current collector significantly enhances the surface oxygen exchange rate on LSCF. But both {\textquoteleft}noble metal{\textquoteright} current collectors, Pt and Au, cannot be considered to be inert on LSCF.",

keywords = "2023 OA procedure",

author = "Boukamp, \{Bernard A.\} and Nicolas Hildenbrand and Bouwmeester, \{Henny J.M.\} and Blank, \{Dave H.A.\}",

year = "2015",

doi = "10.1016/j.ssi.2015.10.013",

language = "English",

volume = "283",

pages = "81--90",

journal = "Solid state ionics",

issn = "0167-2738",

publisher = "Elsevier",

}

TY - JOUR

T1 - Impedance of thin film cathodes

T2 - thickness and current collector dependence

AU - Boukamp, Bernard A.

AU - Hildenbrand, Nicolas

AU - Bouwmeester, Henny J.M.

AU - Blank, Dave H.A.

PY - 2015

Y1 - 2015

N2 - The influence of the layer thickness of mixed ionic–electronic conducting (MIEC) cathodes and the type of noble metal current collector on the apparent surface exchange resistance is studied with impedance spectroscopy. The impedance data is analyzed with the ‘General Finite Length Diffusion’ transfer function. Also a simple relation is derived for the influence of the electronic sheet resistance of a thin layer on the apparent exchange resistance. These analysis methods are applied to a set 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). The apparent chemical capacitance is used to check the reliability of obtaining the oxygen exchange rate from the layer resistance. Use of a fresh, clean platinum gauze current collector significantly enhances the surface oxygen exchange rate on LSCF. But both ‘noble metal’ current collectors, Pt and Au, cannot be considered to be inert on LSCF.

AB - The influence of the layer thickness of mixed ionic–electronic conducting (MIEC) cathodes and the type of noble metal current collector on the apparent surface exchange resistance is studied with impedance spectroscopy. The impedance data is analyzed with the ‘General Finite Length Diffusion’ transfer function. Also a simple relation is derived for the influence of the electronic sheet resistance of a thin layer on the apparent exchange resistance. These analysis methods are applied to a set 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). The apparent chemical capacitance is used to check the reliability of obtaining the oxygen exchange rate from the layer resistance. Use of a fresh, clean platinum gauze current collector significantly enhances the surface oxygen exchange rate on LSCF. But both ‘noble metal’ current collectors, Pt and Au, cannot be considered to be inert on LSCF.

KW - 2023 OA procedure

U2 - 10.1016/j.ssi.2015.10.013

DO - 10.1016/j.ssi.2015.10.013

M3 - Article

SN - 0167-2738

VL - 283

SP - 81

EP - 90

JO - Solid state ionics

JF - Solid state ionics

ER -

Impedance of thin film cathodes: thickness and current collector dependence

Abstract

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Impedance of thin-film cathodes: thickness and current collector dependence

Cite this