Electrochemical Impedance Spectroscopy Investigation of the Anodic Functionalities and Processes in LSCM-CGO-Ni Systems
Type
Conference PaperKAUST Department
Material Science and Engineering ProgramMaterials for Energy Conversion and Storage (MECS) Lab
Physical Science and Engineering (PSE) Division
Date
2015-07-17Online Publication Date
2015-07-17Print Publication Date
2015-07-17Permanent link to this record
http://hdl.handle.net/10754/594110
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Show full item recordAbstract
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 SocietyJournal
ECS TransactionsConference/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 Storageae974a485f413a2113503eed53cd6c53
10.1149/06801.2011ecst