Electrolyte for lithium secondary batteries and lithium secondary battery comprising the same
AssigneeSamsung SDI Co., Ltd.
InventorsYongju Jung, Seok Kim, Jan-Dee Kim
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Abstract
An electrolyte in a lithium secondary battery includes an alkyl ammonium salt having a cation of the following Formula 1, a lithium salt, and an organic solvent: wherein R1 to R4 are independently a C1 to C6 alkyl, a C2 to C6 alkenyl, or substituents thereof. The lithium secondary battery has improved cycle life, high rate characteristics, and a high energy density due to an increase of the average discharge voltage at a high rate.
Claims14
An electrolyte for use in a lithium secondary battery, comprising an alkyl ammonium salt having a cation of the following Formula 1, a lithium salt, and an organic solvent:
- wherein R1 to R4 are independently a C1 to C6 alkyl, a C2 to C6 alkenyl, or substituents thereof, and wherein an anion to be linked with the cation is at least one selected from the group consisting of bis(perfluoroethylsulfonyl)imide (N(C2F5SO2)2−), bis(trifluoromethylsulfonyl)imide (N(CF3SO2)2−), tris(trifluoromethylsulfonyl)methide (C(CF3SO2)3−), trifluoromethane sulfonimide, trifluoromethylsulfonimide, trifluoromethylsulfonate, AsF9−, ClO4−, PF6−, and BF4−.
An electrolyte for use in a lithium secondary battery, comprising an alkyl ammonium salt having a cation of the following Formula 1, a lithium salt, and an organic solvent:
- wherein R1 to R4 are independently a C1 to C6 alkyl, a C2 to C6 alkenyl, or substituents thereof, wherein the organic solvent includes at least one of dimethoxy ethane, dioxolane, and mixtures thereof.
A lithium secondary battery comprising an electrolyte which includes an alkyl ammonium salt having a cation of the following Formula 1, a lithium salt, and an organic solvent:
- wherein R1 to R4 are independently a C1, to C6 alkyl, a C2 to C6 alkenyl, or substituents thereof and wherein the lithium-secondary battery is a lithium-sulfur battery.
Dependencies are inferred from the claim text.