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    Electrochemical Impedance Spectroscopy Investigation of the Anodic Functionalities and Processes in LSCM-CGO-Ni Systems

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    Type
    Conference Paper
    Authors
    Boulfrad, Samir
    Nechache, Aziz
    Cassidy, Mark
    Traversa, Enrico cc
    Irvine, John T S
    KAUST Department
    Material Science and Engineering Program
    Materials for Energy Conversion and Storage (MECS) Lab
    Physical Science and Engineering (PSE) Division
    Date
    2015-07-17
    Online Publication Date
    2015-07-17
    Print Publication Date
    2015-07-17
    Permanent link to this record
    http://hdl.handle.net/10754/594110
    
    Metadata
    Show full item record
    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. © The Electrochemical Society.
    Citation
    Boulfrad S, Nechache A, Cassidy M, Traversa E, Irvine JTS (2015) Electrochemical Impedance Spectroscopy Investigation of the Anodic Functionalities and Processes in LSCM-CGO-Ni Systems. ECS Transactions 68: 2011–2018. Available: http://dx.doi.org/10.1149/06801.2011ecst.
    Publisher
    The Electrochemical Society
    Journal
    ECS Transactions
    Conference/Event name
    14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage
    DOI
    10.1149/06801.2011ecst
    ae974a485f413a2113503eed53cd6c53
    10.1149/06801.2011ecst
    Scopus Count
    Collections
    Conference Papers; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program

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