Electrochemical analysis of nanoscaled Ba0.5Sr 0.5Co0.8Fe0.2O3-δ thin-film cathodes

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

doi:10.1149/2.0861409jes

Electrochemical analysis of nanoscaled Ba_0.5Sr _0.5Co_0.8Fe_0.2O_3-δ thin-film cathodes

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

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

3 Citations (Scopus)

Abstract

The performance of nanoscaled Ba_0.5Sr_0.5Co _0.8Fe_0.2O_3-δ (BSCF) thin-film cathodes was investigated by electrochemical impedance spectroscopy (EIS). Thin-film cathodes derived by metal-organic deposition on Ce_0.9Gd _0.1O_1.95 electrolyte pellets exhibited a film thickness of <100 nm. Performance evaluations of the nanoscaled BSCF thin-film cathodes were systematically conducted on symmetrical cells by EIS with varying temperatures and oxygen partial pressures in the range of 500-625°C and 0.01-0.5 atm, respectively. The impedance data were then analyzed by calculating the distribution of relaxation times (DRT) and by complex nonlinear least squares fitting. Five independent processes associated with the cathode reaction were identified. Area-specific polarization resistances as low as 39 mωcm² were measured at 600°C.

Original language	English
Pages (from-to)	F940-F943
Journal	Journal of the Electrochemical Society
Volume	161
Issue number	9
DOIs	https://doi.org/10.1149/2.0861409jes
Publication status	Published - 2014
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

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

abstract = "The performance of nanoscaled Ba0.5Sr0.5Co 0.8Fe0.2O3-δ (BSCF) thin-film cathodes was investigated by electrochemical impedance spectroscopy (EIS). Thin-film cathodes derived by metal-organic deposition on Ce0.9Gd 0.1O1.95 electrolyte pellets exhibited a film thickness of <100 nm. Performance evaluations of the nanoscaled BSCF thin-film cathodes were systematically conducted on symmetrical cells by EIS with varying temperatures and oxygen partial pressures in the range of 500-625°C and 0.01-0.5 atm, respectively. The impedance data were then analyzed by calculating the distribution of relaxation times (DRT) and by complex nonlinear least squares fitting. Five independent processes associated with the cathode reaction were identified. Area-specific polarization resistances as low as 39 mωcm2 were measured at 600°C.",

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AU - Asano, K.

AU - Klotz, D.

AU - Hayd, J.

AU - Szász, J.

AU - Ivers-Tiffée, E.

PY - 2014

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