High-voltage lithium ion battery electrolyte containing fluorine substituted carboxylic ester

High-voltage lithium ion battery electrolyte containing fluorine substituted carboxylic ester

  • CN 105,720,303 B
  • Filed: 12/05/2014
  • Issued: 06/12/2020
  • Est. Priority Date: 12/05/2014
  • Status: Active Grant
First Claim
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1. A battery electrolyte for high voltage lithium ions, characterized by:

  • the electrolyte contains four components;

    (A) lithium salt, (B) fluorocarboxylate, (C) organic solvent and (D) functional additive;

    the fluorocarboxylic acid ester is ethyl trifluoroacetate;

    the mass fraction of the lithium salt in the electrolyte is 10-15%, the mass fraction of the fluorocarboxylate in the electrolyte is 20-44%, the mass fraction of the organic solvent in the electrolyte is 45-69%, and the mass fraction of the functional additive in the electrolyte is 1-5%;

    the organic solvent is selected from fluoroethylene carbonate and/or difluoroethylene carbonate;

    the functional additive adopts the combination of vinylene carbonate and biphenyl.

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