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Solid State Multinuclear Magnetic Resonance Investigation of Electrolyte Decomposition Products on Lithium Ion ElectrodesSolid electrolyte interphase (SEI) formation in lithium ion cells prepared with advanced electrolytes is investigated by solid state multinuclear (7Li, 19F, 31P) magnetic resonance (NMR) measurements of electrode materials harvested from cycled cells subjected to an accelerated aging protocol. The electrolyte composition is varied to include the addition of fluorinated carbonates and triphenyl phosphate (TPP, a flame retardant). In addition to species associated with LiPF6 decomposition, cathode NMR spectra are characterized by the presence of compounds originating from the TPP additive. Substantial amounts of LiF are observed in the anodes as well as compounds originating from the fluorinated carbonates.
Document ID
20140001964
Document Type
Conference Paper
External Source(s)
Authors
DeSilva, J .H. S. R. (Hunter Coll. New York, NY, United States)
Udinwe, V. (Hunter Coll. New York, NY, United States)
Sideris, P. J. (Hunter Coll. New York, NY, United States)
Smart, M. C. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Krause, F. C. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Hwang, C. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Smith, K. A. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Greenbaum, S. G. (Hunter Coll. New York, NY, United States)
Date Acquired
March 17, 2014
Publication Date
October 10, 2012
Subject Category
Energy Production and Conversion
Meeting Information
Meeting of the Electrochemical Society(Boston, MA)
Funding Number(s)
CONTRACT_GRANT: RR 003037
CONTRACT_GRANT: DE-SC0005029
Distribution Limits
Public
Copyright
Other
Keywords
Li-ion battery electrolytes
NMR analysis
Li-ion batteries