Relative comparison of cathode polarizations in solid oxide fuel cells using the spreading concept in AC 2 point impedance spectroscopy
- Authors
- Lee, B.-K.; Kim, E.-H.; Hwang, J.-H.
- Issue Date
- 2013
- Keywords
- Cathodes; Electrochemical polarization; Fuel cells; Impedance spectroscopy; Interfaces
- Citation
- Journal of the Korean Ceramic Society, v.50, no.2, pp.163 - 167
- Journal Title
- Journal of the Korean Ceramic Society
- Volume
- 50
- Number
- 2
- Start Page
- 163
- End Page
- 167
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/17266
- DOI
- 10.4191/kcers.2013.50.2.163
- ISSN
- 1229-7801
- Abstract
- A modified two-point impedance spectroscopy technique exploits the geometric constriction between an electrolyte and a cathode with an emphasis on semispherical-shaped electrolytes. The spatial limitation in the electrolyte/electrode interface leads to local amplification of the electrochemical reaction occurring in the corresponding electrolyte/electrode region. The modified impedance spectroscopy was applied to electrical monitoring of a YSZ (Y2O3-stabilized ZrO2)/SSC (Sm 0.5Sr0.5CoO3) system. The resolved bulk and interfacial component was numerically analyzed in combination with an equivalent circuit model. The effectiveness of the spreading resistance concept is validated by analysis of the electrode polarization in the cathode materials of solid oxide fuel cells.
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Collections - College of Engineering > Materials Science and Engineering Major > 1. Journal Articles
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