Journal article
Electrochemical Characterization of SEI-Type Passivating Films Using Redox Shuttles
Journal of the Electrochemical Society, v 158(5), pp A530-A536
01 Jan 2011
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Although redox shuttles have been demonstrated to provide overcharge protection for up to 200 cycles, the existence of the solid-electrolyte-interphase (SEI), a passivating film on the negative electrode, seems to be inherently incompatible with a successful shuttle reaction. In this work, the kinetics of ferrocene is measured in the presence and absence of passivating films using rotating-disk-electrode voltammetry. The steady-state current-voltage curve is described by a simple model of Butler-Volmer kinetics and a through-film limiting current. The presence of a passivating film decreases both the limiting current and the effective rate constant. Both parameters decrease with increased passivation time; a decreasing porosity is a possible explanation for the latter observation. The characterization method developed in this work allows direct measurements of the effect of passivating films, thus contributing to understanding of passivation phenomena in nonaqueous electrolytes. (C) 2011 The Electrochemical Society. [DOI: 10.1149/1.3567765] All rights reserved.
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Details
- Title
- Electrochemical Characterization of SEI-Type Passivating Films Using Redox Shuttles
- Creators
- Maureen Tang - University of California, BerkeleyJohn Newman - University of California, Berkeley
- Publication Details
- Journal of the Electrochemical Society, v 158(5), pp A530-A536
- Publisher
- Electrochemical Soc Inc
- Number of pages
- 7
- Grant note
- DE-AC02-05CH11231 / Office of Vehicle Technologies of the U.S. Department of Energy; United States Department of Energy (DOE)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering
- Web of Science ID
- WOS:000288867700014
- Scopus ID
- 2-s2.0-79953215689
- Other Identifier
- 991019298823704721
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InCites Highlights
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Electrochemistry
- Materials Science, Coatings & Films