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

Boukamp, B.A. and Verbraeken, M. and Blank, D.H.A. and Holtappels, P. (2006) SOFC-anodes, proof for a finite-length type Gerischer impedance? Solid State Ionics, 177 . pp. 2539-2541. ISSN 0167-2738

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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
Item Type:	Article
Copyright:	© 2006 Elsevier
Faculty:	Science and Technology (TNW)
Research Group:	Inorganic Materials Science (IMS)
Link to this item:	http://purl.utwente.nl/publications/59212
Official URL:	http://dx.doi.org/10.1016/j.ssi.2006.03.002
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