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Anodic polymerization of vinyl ethylene carbonate in Li-Ion battery electrolyte

  • Author(s): Chen, Guoying
  • Zhuang, Guorong V.
  • Richardson, Thomas J.
  • Gao, Liu
  • Ross Jr., Philip N.
  • et al.
Abstract

A study of the anodic oxidation of vinyl ethylene carbonate (VEC) was conducted with post-mortem analysis of reaction products by ATR-FTIR and gel permeation chromatography (GPC). The half-wave potential (E1/2) for oxidation of VEC is ca. 3.6 V producing a resistive film on the electrode surface. GPC analysis of the film on a gold electrode produced by anodization of a commercial Li-ion battery electrolyte containing 2 percent VEC at 4.1 V showed the presence of a high molecular weight polymer. IR analysis indicated polycarbonate with alkyl carbonate rings linked by aliphatic methylene and methyl branches.

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