Electrolyte for lithium secondary batteries comprising ionic liquid and cosolvent and lithium secondary battery comprising the same
AssigneesHyundai Motor Company, Kia Corporation, Hanbat National University Industry-Academic Cooperation Foundation
InventorsSam Ick Son, Sun Yul Ryou, Phiri Isheunesu, Hyeong Su Bae
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Abstract
An electrolyte for lithium secondary batteries includes an ionic liquid and cosolvents and a lithium secondary battery includes the same. The electrolyte includes a mixed solvent including the ionic liquid and the cosolvents, and at least one electrolyte salt, the cosolvents include a carbonate-based solvent and a nitrile-based solvent, and the mixed solvent includes 50-80 vol % of the ionic liquid, 15-45 vol % of the carbonate-based solvent, and 5-10 vol % of the nitrile-based solvent.
Claims15
An electrolyte for a lithium secondary battery, the electrolyte comprising:
- a mixed solvent comprising an ionic liquid and a cosolvent;
- and
- an electrolyte salt,
- wherein the cosolvent comprises a carbonate-based solvent and a nitrile-based solvent, wherein the ionic liquid comprises at least one of 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMI-TFSI), 1-methyl-3-propylpiperidinium bis(trifluoromethanesulfonyl)imide (P13-TFSI), 1-butyl 1-methylpiperidinium bis(trifluoromethylsulfonyl)imide (P14-TFSI) or any combination thereof, and
- wherein the mixed solvent comprises:
- an amount of about 50-80 vol % of the ionic liquid;
- an amount of about 15-45 vol % of the carbonate-based solvent;
- and
- an amount of about 5-10 vol % of the nitrile-based solvent.
Dependencies are inferred from the claim text.