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I-BIEM calculations of the frequency dispersion and ac current distribution at disk and ring-disk electrodesThe Iterative Boundary Integral Equation Method (I-BIEM) has been applied to the problem of frequency dispersion at a disk electrode in a finite geometry. The I-BIEM permits the direct evaluation of the AC potential (a complex variable) using complex boundary conditions. The point spacing was made highly nonuniform, to give extremely high resolution in those regions where the variables change most rapidly, i.e., in the vicinity of the edge of the disk. Results are analyzed with respect to IR correction, equipotential surfaces, and reference electrode placement. The current distribution is also examined for a ring-disk configuration, with the ring and the disk at the same AC potential. It is shown that the apparent impedance of the disk is inductive at higher frequencies. The results are compared to analytic calculations from the literature, and usually agree to better than 0.001 percent.
Document ID
19930050249
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Cahan, Boris D.
(Case Western Reserve Univ. Cleveland, OH, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1991
Publication Information
Publication: In: Modeling of batteries and fuel cells; Proceedings of the Symposium, Phoenix, AZ, Oct. 13-19, 1991 (A93-34244 13-25)
Publisher: Electrochemical Society, Inc.
Subject Category
Energy Production And Conversion
Accession Number
93A34246
Distribution Limits
Public
Copyright
Other

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