SOFC-anodes, proof for a finite-lenght type Gerischer impedance?

Bernard A. Boukamp, M. Verbraeken, David H.A. Blank, P. Holtappels

Research output: Contribution to journalArticleAcademicpeer-review

44 Citations (Scopus)

Abstract

The impedance of a symmetric cell with Ni/Ti-doped YSZ cermet anodes was measured as function of ambient (PH2, PH2O) and temperature. The impedances showed identical shapes with a minor dispersive contribution in the high frequency region and a dominating dispersion down to 0.01 Hz. The characteristic shape of this dispersion was clearly in between a finite-length Warburg (FLW) and a Gerischer impedance. Analysis of the dispersion in the Bode representation, after subtraction of the high frequency contribution, showed a clear relation with the Gerischer impedance. Assuming a finite-length constraint led to quite reasonable modelling of the data. The parameter set of this finite-length Gerischer showed a consistent dependence on PH2, PH2O. A qualitative interpretation of this modified Gerischer is presented
Original languageUndefined
Pages (from-to)2539-2541
Number of pages4
JournalSolid state ionics
Volume177
DOIs
Publication statusPublished - 2006

Keywords

  • METIS-235028
  • IR-59212

Cite this

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title = "SOFC-anodes, proof for a finite-lenght type Gerischer impedance?",
abstract = "The impedance of a symmetric cell with Ni/Ti-doped YSZ cermet anodes was measured as function of ambient (PH2, PH2O) and temperature. The impedances showed identical shapes with a minor dispersive contribution in the high frequency region and a dominating dispersion down to 0.01 Hz. The characteristic shape of this dispersion was clearly in between a finite-length Warburg (FLW) and a Gerischer impedance. Analysis of the dispersion in the Bode representation, after subtraction of the high frequency contribution, showed a clear relation with the Gerischer impedance. Assuming a finite-length constraint led to quite reasonable modelling of the data. The parameter set of this finite-length Gerischer showed a consistent dependence on PH2, PH2O. A qualitative interpretation of this modified Gerischer is presented",
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author = "Boukamp, {Bernard A.} and M. Verbraeken and Blank, {David H.A.} and P. Holtappels",
year = "2006",
doi = "10.1016/j.ssi.2006.03.002",
language = "Undefined",
volume = "177",
pages = "2539--2541",
journal = "Solid state ionics",
issn = "0167-2738",
publisher = "Elsevier",

}

SOFC-anodes, proof for a finite-lenght type Gerischer impedance? / Boukamp, Bernard A.; Verbraeken, M.; Blank, David H.A.; Holtappels, P.

In: Solid state ionics, Vol. 177, 2006, p. 2539-2541.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - SOFC-anodes, proof for a finite-lenght type Gerischer impedance?

AU - Boukamp, Bernard A.

AU - Verbraeken, M.

AU - Blank, David H.A.

AU - Holtappels, P.

PY - 2006

Y1 - 2006

N2 - The impedance of a symmetric cell with Ni/Ti-doped YSZ cermet anodes was measured as function of ambient (PH2, PH2O) and temperature. The impedances showed identical shapes with a minor dispersive contribution in the high frequency region and a dominating dispersion down to 0.01 Hz. The characteristic shape of this dispersion was clearly in between a finite-length Warburg (FLW) and a Gerischer impedance. Analysis of the dispersion in the Bode representation, after subtraction of the high frequency contribution, showed a clear relation with the Gerischer impedance. Assuming a finite-length constraint led to quite reasonable modelling of the data. The parameter set of this finite-length Gerischer showed a consistent dependence on PH2, PH2O. A qualitative interpretation of this modified Gerischer is presented

AB - The impedance of a symmetric cell with Ni/Ti-doped YSZ cermet anodes was measured as function of ambient (PH2, PH2O) and temperature. The impedances showed identical shapes with a minor dispersive contribution in the high frequency region and a dominating dispersion down to 0.01 Hz. The characteristic shape of this dispersion was clearly in between a finite-length Warburg (FLW) and a Gerischer impedance. Analysis of the dispersion in the Bode representation, after subtraction of the high frequency contribution, showed a clear relation with the Gerischer impedance. Assuming a finite-length constraint led to quite reasonable modelling of the data. The parameter set of this finite-length Gerischer showed a consistent dependence on PH2, PH2O. A qualitative interpretation of this modified Gerischer is presented

KW - METIS-235028

KW - IR-59212

U2 - 10.1016/j.ssi.2006.03.002

DO - 10.1016/j.ssi.2006.03.002

M3 - Article

VL - 177

SP - 2539

EP - 2541

JO - Solid state ionics

JF - Solid state ionics

SN - 0167-2738

ER -