Characterization of a LSCF/GDC Cathode Composite in Solid Oxide Fuel Cells Using Impedance SpectroscopyCharacterization of a LSCF/GDC Cathode Composite in Solid Oxide Fuel Cells Using Impedance Spectroscopy
- Other Titles
- Characterization of a LSCF/GDC Cathode Composite in Solid Oxide Fuel Cells Using Impedance Spectroscopy
- Authors
- 황진하; Byung-Kook Lee
- Issue Date
- 2005
- Publisher
- 한국세라믹학회
- Keywords
- Electrolyte; Point Contact; SOFC; Impedance Spectroscopy; Spreading ResistanceI. IntroductionThe concept of a hydrogen economy has ignited the advent of the electrochemical fuel cells which convert the chemical energy of fuels directly to electricit
- Citation
- 한국세라믹학회지, v.42, no.12, pp.793 - 799
- Journal Title
- 한국세라믹학회지
- Volume
- 42
- Number
- 12
- Start Page
- 793
- End Page
- 799
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/25363
- ISSN
- 1229-7801
- Abstract
- A composite cathode of LSCF(La0.6Sr0.4Co0.2Fe0.8O3) and GDC(Gd2O3-Doped CeO2: Cd0.9Ge0.1O1.95) was characterized in terms of an electrode response, using a point contact in an yttria-stabilized zirconia (YSZ) electrolyte incorporated into AC two-point impedance spectroscopy. The point-contacted configuration amplifies the responses occurring near the YSZ/cathode interface through the aligned point contact on the planar LSCF/GDC electrode. The point contact interface increases the bulk resistance allowing the estimation of the point contact geometry and resolving the electrode-related responses. The resultant impedance spectra are analyzed through an equivalent circuit model constructed by resistors and constant phase elements. The bulk responses can be resolved from the electrode-related portions in terms of spreading resistance. The electrode-related polarizations are measured in terms of temperature and oxygen partial pressure. The modified impedance spectroscopy is discussed in terms of methodology and analytical aspects, toward resolving the electrode-polarization issues 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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