A Study of Electrochemical Reduction of Ethylene and Propylene Carbonate Electrolytes on Graphite Using ATR-FTIR Spectroscopy

We present results testing the hypothesis that there is a different reaction pathway for the electrochemical reduction of PC versus EC-based electrolytes at graphite electrodes with LiPF6 as the salt in common. We examined the reduction products formed using ex-situ Fourier Transform Infrared (FTIR)...

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Bibliographic Details
Main Authors: Zhuang, Guorong V., Yang, Hui, Blizanac, Berislav, Ross, Philip N., Jr.
Other Authors: United States. Department of Energy. Office of FreedomCAR and Vehicle Technologies.
Format: Article in Journal/Newspaper
Language:English
Published: Lawrence Berkeley National Laboratory 2005
Subjects:
Ethylene
25 Energy Storage
Reflection
Electrodes
Geometry
Inorganic Compounds
Testing Li-Ion Battery Ftir Spectroscopy Solid Electrolyteinterphase
Electrolytes
Lithium Carbonates
Graphite
Mixtures
Spectroscopy
Carbonic Acid Esters
Li-Ion Battery Ftir Spectroscopy Solid Electrolyteinterphase
Hypothesis
Carbonic acid
Online Access:https://digital.library.unt.edu/ark:/67531/metadc794270/
Description
Summary:We present results testing the hypothesis that there is a different reaction pathway for the electrochemical reduction of PC versus EC-based electrolytes at graphite electrodes with LiPF6 as the salt in common. We examined the reduction products formed using ex-situ Fourier Transform Infrared (FTIR) spectroscopy in attenuated total reflection (ATR) geometry. The results show the pathway for reduction of PC leads nearly entirely to lithium carbonate as the solid product (and presumably ethylene gas as the co-product) while EC follows a path producing a mixture of organic and inorganic compounds. Possible explanations for the difference in reaction pathway are discussed.

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