Solid State Multinuclear Magnetic Resonance Investigation of Electrolyte Decomposition Products on Lithium Ion Electrodes

DeSilva, J .H. S. R.; Udinwe, V.; Sideris, P. J.; Smart, M. C.; Krause, F. C.; Hwang, C.; Smith, K. A.; Greenbaum, S. G.

Solid 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)

hdl:2014/42794

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

Meeting Information

Meeting of the Electrochemical Society(Boston, MA)

Funding Number(s)

Distribution Limits

Public

Other

Keywords

NTRS

NTRS - NASA Technical Reports Server