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.
Claims17
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 in a volume ratio of about 1:3 to 1:9.
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 electrolyte salt comprises a lithium salt selected from the group consisting of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), lithium bis(oxalate)borate (LiBOB), lithium bis(fluorosulfonyl)imide (LiFSI), and lithium hexafluorophosphate (LiPF6), and optionally further comprises a salt additive comprising LiNO3.
Dependencies are inferred from the claim text.