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Chemical and morphological characteristics of lithium electrode surfacesLithium electrode surfaces were analyzed for chemical and morphological characteristics, using electron spectroscopy chemical analysis (ESCA) and scanning electron microscopy (SEM). Samples included lithium metal and lithium electrodes which were cycled in a 1.5 M lithium arsenic hexafluoride/two-methyl tetrahydrofuran electrolyte. Results show that the surface of the as-received lithium metal was already covered by a film composed of LiO2 and an Li2O/CO2 adduct with a thickness of approximately 100-200 A. No evidence of Ni3 was found. Upon exposure of the lithium electrode to a 1.5 M LiAsF6/2-Me-THF electrochemical environment, a second film was observed to form on the surface, consisting primarily of As, Si, and F, possibly in the form of lithium arsenic oxyfluorides or lithium fluorosilicates. It is suggested that the film formation may be attributed to salt degradation.
Document ID
19810055786
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Yen, S. P. S.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Shen, D.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Vasquez, R. P.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Grunthaner, F. J.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Somoano, R. B.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)
Date Acquired
August 11, 2013
Publication Date
July 1, 1981
Publication Information
Publication: Electrochemical Society
Subject Category
Inorganic And Physical Chemistry
Accession Number
81A40190
Funding Number(s)
CONTRACT_GRANT: NAS7-100
Distribution Limits
Public
Copyright
Other

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