Electrochemical analysis of Nanoscaled Ba0.5Sr 0.5Co0.8Fe0.2O3-δthin-film cathodes

K. Asano; D. Klotz; J. Hayd; J. Szász; E. Ivers-Tiffée

doi:10.1149/05701.2065ecst

Electrochemical analysis of Nanoscaled Ba_0.5Sr _0.5Co_0.8Fe_0.2O_3-δthin-film cathodes

K. Asano, D. Klotz, J. Hayd, J. Szász, E. Ivers-Tiffée

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

Abstract

Nanoscaled Ba_0.5Sr_0.5Co_0.8Fe _0.2O_3-δthin-film cathodes deposited by spin-coating followed by pyrolysis of the metal organic precursors (the metal organic deposition [MOD] process) with a film thickness below 100 nm on Ce _0.9Gd_0.1O_1.95electrolyte pellets were investigated with a focus on the cathode reaction processes. Electrochemical impedance spectroscopy was carried out under systematic variation of the temperature (T = 500-625 °C) and oxygen partial pressure (pO₂ = 0.01-0.5 atm). The impedance data were then analyzed by calculating the distribution of relaxation times (DRT) and performing complex nonlinear least squares (CNLS) fitting. Five processes were identified in the cathode reaction. Area specific polarization resistances as low as ASRpol = 39 mω cm ² at 600 °C were found.

Original language	English
Pages (from-to)	2065-2073
Number of pages	9
Journal	ECS Transactions
Volume	57
Issue number	1
DOIs	https://doi.org/10.1149/05701.2065ecst
Publication status	Published - 2013
Externally published	Yes

All Science Journal Classification (ASJC) codes

Engineering(all)

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title = "Electrochemical analysis of Nanoscaled Ba0.5Sr 0.5Co0.8Fe0.2O3-δthin-film cathodes",

abstract = "Nanoscaled Ba0.5Sr0.5Co0.8Fe 0.2O3-δthin-film cathodes deposited by spin-coating followed by pyrolysis of the metal organic precursors (the metal organic deposition [MOD] process) with a film thickness below 100 nm on Ce 0.9Gd0.1O1.95electrolyte pellets were investigated with a focus on the cathode reaction processes. Electrochemical impedance spectroscopy was carried out under systematic variation of the temperature (T = 500-625 °C) and oxygen partial pressure (pO2 = 0.01-0.5 atm). The impedance data were then analyzed by calculating the distribution of relaxation times (DRT) and performing complex nonlinear least squares (CNLS) fitting. Five processes were identified in the cathode reaction. Area specific polarization resistances as low as ASRpol = 39 mω cm 2 at 600 °C were found.",

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AU - Asano, K.

AU - Klotz, D.

AU - Hayd, J.

AU - Szász, J.

AU - Ivers-Tiffée, E.

PY - 2013

Y1 - 2013

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