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Electrochemical impedance spectroscopy investigation of the anodic functionalities and processes in LSCM-CGO-Ni systems

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Author(s)

Samir Boulfrad, A. Nechache, Mark Cassidy, E. Traversa, John Thomas Sirr Irvine

School/Research organisations

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.

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Details

Original languageEnglish
Title of host publication14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015
EditorsK. Eguchi, S. C. Singhal
PublisherElectrochemical Society
Pages2011-2018
Number of pages8
ISBN (Print)9781607685395
DOIs
Publication statusPublished - 2015

Publication series

NameECS Transactions
PublisherElectrochemical Society
Number1
Volume68
ISSN (Print)1938-5862

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