Electrolyte and electrochemical device comprising the same

  • US 11,024,884 B2
  • Filed: 12/06/2018
  • Issued: 06/01/2021
  • Est. Priority Date: 09/21/2018
  • Status: Active Grant
First Claim
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1. An electrolyte, comprising a fluorinated cyclic carbonate, a multi-nitrile compound having an ether bond, and a dinitrile compound;

  • wherein the dinitrile compound comprises at least one selected from the group consisting of succinonitrile and adiponitrile;

    based on the total weight of the electrolyte, the weight percentage (Cf) of the fluorinated cyclic carbonate is greater than the weight percentage (Cn) of the multi-nitrile compound having the ether bond,wherein based on the total weight of the electrolyte, Cf is about 0.1 wt %-about 10 wt %, and Cn is about 0.1 wt %-about 5 wt %, andwherein the multi-nitrile compound having an ether bond is selected from at least one of the group consisting of 1,2,3-tris(2-cyanoethoxy)propane, 1,2,4-tris(2-cyanoethoxy)butane, 1,1,1-tris(cyanoethoxymethylene)ethane, 1,1,1-tris(cyanoethoxymethylene)propane, 3-methyl-1,3,5-tris(cyanoethoxy)pentane, 1,2,7-tris(cyanoethoxy)heptane, 1,2,6-tris(cyanoethoxy)hexane, and 1,2,5-tris(cyanoethoxy)pentane.

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