Patent ID: 8808924

Claim:
An electrolyte for a secondary battery, comprising a mixture consisting of: (a) an amide group-containing compound with at least one electron donating group (EDG) introduced into the N-position thereof; and (b) an ionizable lithium salt; wherein the amide group-containing compound is selected from the group consisting of N-ethylacetamide, ethyl N-methylcarbamate, ethyl N-ethylcarbamate, ethyl N,N-dimethylcarbamate, methyl N-methylcarbamate, methyl N,N-dimethylcarbamate, phenyl N,N-dimethylcarbamate, methyl N-butylcarbamate, methyl N-phenylcarbamate, methyl N-ethylcarbamate, and N-ethyl-N-phenylethylcarbamate; and wherein the electrolyte excludes organic solvent selected from the group consisting of toluene, acetone, acetonitrile, tetrahydrofuran (THF), propylene carbonate (PC), ethylene carbonate (EC), diethyl carbonate (DEC), dimethyl carbonate (DMC), dipropyl carbonate (DPC), dimethyl sulfoxide, dimethoxyethane, diethoxyethane, N-methyl-2-pyrrolidone (NMP), ethyl methyl carbonate (EMC), gamma-butyrolactone (GBL) and a mixture thereof.