Functionalized choline chloride ionic liquid, preparation method thereof and use in electrochemical energy storage device

Abstract

The present invention discloses a process for preparing a functionalized choline chloride ionic liquid as defined in formula (I), and thereof use in an electrochemical energy storage device, as an electrolyte solution or an additive for a lithium ion battery and a supercapacitor. The ionic liquid electrolyte material has better biocompatibility, flame retardance, high ionic conductivity, low viscosity, and wide electrochemical window. wherein R1 is selected from the group consisting of: (CH2═CH—(CH2)n)—, CN(CH2)n—, or R23Si—; R2 is selected from CH3—(CH2)m—, n is an integer selected from 1 to 3, m is an integer selected from 0 to 2; or one of R2 is (CH3)3Si—O—. Anion A in Formula I is selected from the group consisting of: Cl−, Br−, I−, BF4−, NO3−, SO42−, CF3COO−, CF3SO3−, (CF3SO2)2N−, PF6−, BF2C2O4−, or B(C2O4)2−.

Dependencies are inferred from the claim text.