Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 158, Issue 5, Pages A498-A503Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.3561424
Keywords
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Funding
- Ministry of Education, Science and Technology [R31-10013]
- Research Center for Energy Conversion and Storage
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The passivating ability of surface film derived from vinylene carbonate (VC) is addressed on tin (Sn) negative electrode after a comparative study on the thickness, film growth pattern, chemical composition, and mechanical flexibility of the surface films generated from VC-free and VC-added electrolytes. The surface film derived from the former electrolyte is enriched by inorganic fluorinated and carbonate species, and shows a poor passivating ability to cause a continued electrolyte decomposition, film growth and eventual electrode failure. In contrast, organic carbon-oxygen species are dominant in the film derived from the VC-added electrolyte. Even if this film is thinner than the other, it passivates the Sn electrode surface more effectively. As a result, the film growth and electrode polarization are less significant. The superior passivating ability of organic-rich surface film has been ascribed to a uniform coverage and higher mechanical flexibility. (C) 2011 The Electrochemical Society. [DOI: 10.1149/1.3561424] All rights reserved.
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