Electrochemical impedance spectroscopy investigation of the anodic functionalities and processes in LSCM-CGO-Ni systems
Abstract
Electrochemical impedance spectroscopy was used to characterize anode compositions made of (La0.75Sr0.25)0.97Cr0.5Mn0.5O3 (LSCM) and gadolinia doped ceria (CGO) with and without additional submicron Ni, or exsoluted Ni nanoparticles. In addition, the effects of the anode gas flow rate and the working temperature were investigated. Higher content of the ionic conductor leads to a decrease of the impedance in the frequency range from 100 Hz to 10 Hz. The effect of the catalyst component was investigated while keeping the electronic conductivity unchanged in the tested materials. Enhanced catalytic activity was demonstrated to considerably decrease the impedance especially in the frequency range between 100 Hz to 1 Hz. The change in the gas flow rate affects mainly the impedance bellow 1 Hz.
Citation
Boulfrad , S , Nechache , A , Cassidy , M , Traversa , E & Irvine , J T S 2015 , Electrochemical impedance spectroscopy investigation of the anodic functionalities and processes in LSCM-CGO-Ni systems . in K Eguchi & S C Singhal (eds) , 14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015 . ECS Transactions , no. 1 , vol. 68 , Electrochemical Society , pp. 2011-2018 . https://doi.org/10.1149/06801.2011ecst
Publication
14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015
ISSN
1938-5862Type
Conference item
Rights
© The Electrochemical Society, Inc. 2015. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS). The archival version of this work was published here: https://dx.doi.org/10.1149/06801.2011ecst
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