Additive having cyano group for non-aqueous electrolyte and electrochemical device using the same

摘要

Disclosed is an additive for a non-aqueous electrolyte, which is a compound having a double bond and at least two cyano groups, the two cyano groups being in a trans-formation to the double bond. Also, a non-aqueous electrolyte comprising the additive and an electrochemical device comprising the non-aqueous electrolyte are also disclosed. Further, an electrode comprising the cyano group-containing compound and an electrochemical device comprising the electrode are disclosed.

主权项

1. A non-aqueous electrolyte comprising:
an electrolyte salt; an organic solvent; and an additive for a non-aqueous electrolyte, wherein the additive for a non-aqueous electrolyte is a compound represented by the following Formula 1 and having a double bond and at least two cyano groups, wherein the two of the at least two cyano groups are in a trans-formation to the double bond, wherein the electrolyte salt is formed of a combination of (i) a cation selected from the group consisting of Li+, Na+ and K+; and (ii) an anion selected from the group consisting of PF6−, BF4−, Cl−, Br−, I−, ClO4−, AsF6−; CH3CO2−, CF3SO3−, N(CF3SO2)2− and C(CF2SO2)3−, wherein the organic solvent is at least one solvent selected from the group consisting of cyclic carbonates, linear carbonates, lactones, ethers, esters, sulfoxides, acetonitriles, lactams, ketones and halogen derivatives thereof: wherein the compound represented by the Formula 1 is 1,1,4,4-tetracyanobutene.