Electrochemical impedance measurement and analysis of anodic concentration polarization for pressurized solid oxide fuel cells

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题名:	Electrochemical impedance measurement and analysis of anodic concentration polarization for pressurized solid oxide fuel cells
作者:	施聖洋;Wu, P. C.;Jheng, H. S.;Shy, S. S.
贡献者:	工學院機械工程學系
日期:	2014-01-01
上传时间:	2026-04-23 15:07:08 (UTC+8)
出版者:	Electrochemical Society, Inc.;The Electrochemical Society
摘要:	摘要： This paper investigates experimentally and analytically the effect of pressurization on the anodic concentration polarization of a planar anode-supported full cell with flow distributors in both anode and cathode using a recently-established high-pressure dual-chamber SOFC test facility. In it the power generating characteristics and electrochemical impedance spectra of such single-cell are measured at constant flow rates (anode: 0.5 slpm H2 + 0.4 slpm N2; cathode: 0.9 slpm air) and at a fixed operating temperature (T = 800°C) but with five different pressures (p) varying incrementally from to 1 atm to 5 atm. Measurements show that the high frequency arcs of impedance spectra decrease rather weakly with increasing p, while the low frequency arcs with characteristic frequencies occurring at about 0.5 ∼ 1 Hz decrease strongly with increasing p. It is found that the ohmic resistance is independent of p, but the polarization resistance and the calculated anodic concentration overvoltage decrease noticeably with increasing p. 其他題名： J. Electrochem. Soc 出版者： The Electrochemical Society 出版日期： 2014-01-01 出處： Journal of the Electrochemical Society, 2014-01, Vol.161 (4), p.F513-F517 資源來源： Institute of Physics Journals 版權： 2014 The Electrochemical Society 識別號： ISSN: 0013-4651 識別號： EISSN: 1945-7111 識別號： DOI: 10.1149/2.078404jes
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