Diffusion and Gas Conversion Analysis of Solid Oxide Fuel Cells at Loads via AC Impedance
Joint Authors
Zhu, Wenhua H.
Tatarchuk, Bruce J.
Elangovan, S.
Payne, Robert U.
Timper, Mark S.
Zhu, Ying
Source
International Journal of Electrochemistry
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-10-01
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Impedance measurements were conducted under practical load conditions in solid oxide fuel cells of differing sizes.
For a 2 cm2 button cell, impedance spectra data were separately measured for the anode, cathode, and total cell.
Improved equivalent circuit models are proposed and applied to simulate each of measured impedance data.
Circuit elements related to the chemical and physical processes have been added to the total-cell model to account for an extra relaxation process in the spectra not measured at either electrode.
The processes to which elements are attributed have been deduced by varying cell temperature, load current, and hydrogen concentration.
Spectra data were also obtained for a planar stack of five 61 cm2 cells and the individual cells therein, which were fitted to a simplified equivalent circuit model of the total button cell.
Similar to the button cell, the planar cells and stack exhibit a pronounced low-frequency relaxation process, which has been attributed to concentration losses, that is, the combined effects of diffusion and gas conversion.
The simplified total-cell model approximates well the dynamic behavior of the SOFC cells and the whole stack.
American Psychological Association (APA)
Payne, Robert U.& Zhu, Ying& Zhu, Wenhua H.& Timper, Mark S.& Elangovan, S.& Tatarchuk, Bruce J.. 2011. Diffusion and Gas Conversion Analysis of Solid Oxide Fuel Cells at Loads via AC Impedance. International Journal of Electrochemistry،Vol. 2011, no. 2011, pp.1-11.
https://search.emarefa.net/detail/BIM-473737
Modern Language Association (MLA)
Payne, Robert U.…[et al.]. Diffusion and Gas Conversion Analysis of Solid Oxide Fuel Cells at Loads via AC Impedance. International Journal of Electrochemistry No. 2011 (2011), pp.1-11.
https://search.emarefa.net/detail/BIM-473737
American Medical Association (AMA)
Payne, Robert U.& Zhu, Ying& Zhu, Wenhua H.& Timper, Mark S.& Elangovan, S.& Tatarchuk, Bruce J.. Diffusion and Gas Conversion Analysis of Solid Oxide Fuel Cells at Loads via AC Impedance. International Journal of Electrochemistry. 2011. Vol. 2011, no. 2011, pp.1-11.
https://search.emarefa.net/detail/BIM-473737
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-473737