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Dependence of Open-circuit Potential and Power Density on Electrolyte Thickness in Solid Oxide Fuel Cells with Mixed Conducting Electrolytes by Keith L. Duncan; Kang-Taek Lee; Eric D. Wachsman is a Engineering article available to read on EtoBox.

What is Dependence of Open-circuit Potential and Power Density on Electrolyte Thickness in Solid Oxide Fuel Cells with Mixed Conducting Electrolytes about?

Solid oxide fuel cell (SOFC) Modeling Mixed conducting electrolyte or mixed ionic-electronic conductor (MIEC) Electrolyte open circuit voltage/potential (OCV or OCP) Power density Ceria a b s t r a c t A continuum-level electrochemical model previously developed by the authors [1] is used to investigate the dependence of open-circuit voltage (OCV) , and maximum power density on electrolyte thickness for solid oxide fuel cells (SOFCs) with mixed conducting electrolytes. Experimental results confirm the models predictions that OCV decreases monotonically with decreasing electrolyte thickness due to increased permeation flux [1]. The model was further extended to show that there exists an optimal electrolyte thickness at which maximum power density occurs for mixed conducting electrolytes. As expected, for electrolyte thickness greater than optimal losses from ohmic overpotential reduce cell output. However, when the electrolyte thickness is lower than optimal losses from an increasing electronic "leakage" current reduce cell output.

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Author

Keith L. Duncan; Kang-Taek Lee; Eric D. Wachsman

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0378-7753)

Published

2011

Language

EN

Field

Engineering (Physical Sciences)