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US 12,620,624 B2Granted
Non-aqueous electrolytic solution for lithium secondary battery and lithium secondary battery comprising same
AssigneeLG Energy Solution, Ltd.
InventorsJeong-Beom Lee, Ye-Eun Kim, Seok-Koo Kim, Je-Young Kim
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Abstract
An electrolyte for a lithium secondary battery including a wettability-improving additive having a trifluoromethylsulfonyl group. The electrolyte has reduced surface tension to improve the wettability of an electrode assembly with the electrolyte. Therefore, it is possible to ensure high electrolyte wettability even when the electrolyte includes a high-boiling point solvent or a high concentration of lithium salt.
Claims5
A non-aqueous electrolyte for a lithium-ion secondary battery, comprising a lithium salt, an organic solvent and a wettability-improving additive,
- wherein the wettability-improving additive consists of 1H,1H,5H-Octafluoropentyl trifluoromethanesulfonate, and is included in an amount of 0.05-3 wt % based on a total weight of the non-aqueous electrolyte,
- the organic solvent comprises nitrile-based solvent in an amount of 95 wt % or more based on a total amount of the organic solvent, and
- the nitrile-based solvent comprises succinonitrile.
Dependencies are inferred from the claim text.