Impedance studies on LSCM/GDC composite cathode for high temperature CO2 electrolysis

X. Yue; J. T S Irvine

doi:10.1149/1.3702415

Impedance studies on LSCM/GDC composite cathode for high temperature CO2 electrolysis

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The cathode performance of LSCM/GDC composite for high temperature CO ₂ electrolysis has been studied by electrochemical impedance spectroscopy (EIS) measurements in a three-electrode electrolysis cell. The main feature in the impedance of LSCM/GDC is that it showed a Gerischer like impedance dispersion at 900°C in all CO₂-CO mixtures investigated here. The Rs of LSCM/GDC changes little with the variations in CO ₂/CO ratio and operating voltage, however, the Rp of LSCM/GDC composite reduces with increasing CO concentration and operation potential. The activation energy for area specific resistance and for cathode polarization resistance is ∼58 and 72 kJ mol^-1 in CO₂/CO 70/30 fUel, respectively. The surface adsorption/desorption equilibration and/or surface diffusion processes play a dominant role in the electrochemical reduction of CO₂ by SOEC.

Original language	English
Title of host publication	Electrochemical Synthesis of Fuels 1
Pages	87-95
Number of pages	9
Volume	41
Edition	33
DOIs	https://doi.org/10.1149/1.3702415
Publication status	Published - 1 Dec 2012
Event	1st International Symposium on Electrochemical Synthesis of Fuels, ESF 2011 - 220th ECS Meeting - Boston, MA, United States Duration: 9 Oct 2011 → 14 Oct 2011

Conference

Conference	1st International Symposium on Electrochemical Synthesis of Fuels, ESF 2011 - 220th ECS Meeting
Country/Territory	United States
City	Boston, MA
Period	9/10/11 → 14/10/11

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10.1149/1.3702415

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title = "Impedance studies on LSCM/GDC composite cathode for high temperature CO2 electrolysis",

abstract = "The cathode performance of LSCM/GDC composite for high temperature CO 2 electrolysis has been studied by electrochemical impedance spectroscopy (EIS) measurements in a three-electrode electrolysis cell. The main feature in the impedance of LSCM/GDC is that it showed a Gerischer like impedance dispersion at 900°C in all CO2-CO mixtures investigated here. The Rs of LSCM/GDC changes little with the variations in CO 2/CO ratio and operating voltage, however, the Rp of LSCM/GDC composite reduces with increasing CO concentration and operation potential. The activation energy for area specific resistance and for cathode polarization resistance is ∼58 and 72 kJ mol-1 in CO2/CO 70/30 fUel, respectively. The surface adsorption/desorption equilibration and/or surface diffusion processes play a dominant role in the electrochemical reduction of CO2 by SOEC.",

author = "X. Yue and Irvine, {J. T S}",

year = "2012",

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doi = "10.1149/1.3702415",

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AU - Yue, X.

AU - Irvine, J. T S

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N2 - The cathode performance of LSCM/GDC composite for high temperature CO 2 electrolysis has been studied by electrochemical impedance spectroscopy (EIS) measurements in a three-electrode electrolysis cell. The main feature in the impedance of LSCM/GDC is that it showed a Gerischer like impedance dispersion at 900°C in all CO2-CO mixtures investigated here. The Rs of LSCM/GDC changes little with the variations in CO 2/CO ratio and operating voltage, however, the Rp of LSCM/GDC composite reduces with increasing CO concentration and operation potential. The activation energy for area specific resistance and for cathode polarization resistance is ∼58 and 72 kJ mol-1 in CO2/CO 70/30 fUel, respectively. The surface adsorption/desorption equilibration and/or surface diffusion processes play a dominant role in the electrochemical reduction of CO2 by SOEC.

AB - The cathode performance of LSCM/GDC composite for high temperature CO 2 electrolysis has been studied by electrochemical impedance spectroscopy (EIS) measurements in a three-electrode electrolysis cell. The main feature in the impedance of LSCM/GDC is that it showed a Gerischer like impedance dispersion at 900°C in all CO2-CO mixtures investigated here. The Rs of LSCM/GDC changes little with the variations in CO 2/CO ratio and operating voltage, however, the Rp of LSCM/GDC composite reduces with increasing CO concentration and operation potential. The activation energy for area specific resistance and for cathode polarization resistance is ∼58 and 72 kJ mol-1 in CO2/CO 70/30 fUel, respectively. The surface adsorption/desorption equilibration and/or surface diffusion processes play a dominant role in the electrochemical reduction of CO2 by SOEC.

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BT - Electrochemical Synthesis of Fuels 1

T2 - 1st International Symposium on Electrochemical Synthesis of Fuels, ESF 2011 - 220th ECS Meeting

Y2 - 9 October 2011 through 14 October 2011

ER -

Impedance studies on LSCM/GDC composite cathode for high temperature CO2 electrolysis

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