干旱区生态环境知识资源中心(Arid): Application of impedance spectroscopy to SOFC research

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DOI	10.2172/460180
报告编号	CONF-961107--Absts.
来源ID	OSTI_ID: 460180
	Application of impedance spectroscopy to SOFC research
	Hsieh, G.; Mason, T.O. [Northwestern Univ., Evanston, IL (United States)]; Pederson, L.R. [Pacific Northwest National Lab., Richland, WA (United States)]
英文摘要	With the resurgence of interest in solid oxide fuel cells and other solid state electrochemical devices, techniques originally developed for characterizing aqueous systems are being adapted and applied to solid state systems. One of these techniques, three-electrode impedance spectroscopy, is particularly powerful as it allows characterization of subcomponent and interfacial properties. Obtaining accurate impedance spectra, however, is difficult as reference electrode impedance is usually non-negligible and solid electrolytes typically have much lower conductance than aqueous solutions. Faidi et al and Chechirlian et al have both identified problems associated with low conductivity media. Other sources of error are still being uncovered. Ford et al identified resistive contacts with large time constants as a possibility, while Me et al showed that the small contact capacitance of the reference electrode was at fault. Still others show that instrument limitations play a role. Using the voltage divider concept, a simplified model that demonstrates the interplay of these various factors, predicts the form of possible distortions, and offers means to minimize errors is presented.
出版年	1996
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	30 DIRECT ENERGY CONVERSION ; 36 MATERIALS SCIENCE ; SOLID ELECTROLYTE FUEL CELLS ; ELECTRODES ; YTTRIUM OXIDES ; SPECTRA ; ZIRCONIUM OXIDES ; AQUEOUS SOLUTIONS ; CAPACITANCE ; ELECTROLYTES ; ERRORS
URL	http://www.osti.gov/scitech/servlets/purl/460180
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/266858
推荐引用方式 GB/T 7714	Hsieh, G.,Mason, T.O. [Northwestern Univ., Evanston, IL ,Pederson, L.R. [Pacific Northwest National Lab., Richland, WA . Application of impedance spectroscopy to SOFC research,1996.