US12573661USUSPTO Grant XML

Non-aqueous electrolyte solution additive, non-aqueous electrolyte solution including the same, and lithium secondary battery

The present invention relates to a non-aqueous electrolyte solution additive capable of improving lifespan characteristics of a lithium secondary battery by forming a solid-electrolyte interphase that is stable even at a high temperature and has low resistance when applied to a non-aqueous electrolyte solution, and relates to a non-aqueous electrolyte solution additive including a sultone-based compound represented by Formula I, a non-aqueous electrolyte solution including the same, and a lithium secondary battery.

Patent

Brief

Patent brief

Problem

How can battery fires and thermal runaway in EV packs be prevented?

Novelty

Fire-resistant electrolytes is reinforced by front-page matches on electrolyte.

Uses

Lithium-ion cells, EV batteries, Grid storage

Assignee

LG Energy Solution, Ltd.

Published

Mar 10, 2026

Inventors

Jung Keun Kim, Young Min Lim, Won Kyun Lee, Duk Hun Jang, Chan Woo Noh, Chul Eun Yeom, Jeong Ae Yoon, Kyoung Hoon Kim, Chul Haeng Lee, Shul Kee Kim, Young Cheol Choi

Domain

Mobility / storage

Plain-English summary

Problem

How can battery fires and thermal runaway in EV packs be prevented?

Solution

relates to a non-aqueous electrolyte solution additive capable of improving lifespan characteristics of a lithium secondary battery by forming a solid-electrolyte interphase that is stable even at a high temperature and has low resistance when applied to a non-aqueous electrolyte solution, and relates to a non-aqueous electrolyte solution additive including a sultone-based compound represented by Formula I, a non-aqueous electrolyte solution including the same, and a lithium secondary battery.

Key novelty

Fire-resistant electrolytes is reinforced by front-page matches on electrolyte.

Applications

Lithium-ion cellsEV batteriesGrid storage

Relevant search intents

electrolyte

Claims preview

1 . A non-aqueous electrolyte solution additive, comprising: a sultone-based compound represented by Formula 1: wherein in Formula 1, X is O or S, Y is O, S, or NR, wherein R is hydrogen, a substituted or unsubstituted linear or branched C1-C10 alkyl group, a substituted or unsubstituted linear or branched C2-C10 alkenyl group, or a substituted or unsubstituted linear or branched C2-C10 alkynyl group, Z is a substituted or unsubstituted linear or branched C1-C10 alkylene group, a C O group, an O S O group, a C S group, or a S O group, and R1 and R2 are each independently hydrogen, a substituted or unsubstituted linear or branched C1-C10 alkyl group, a substituted or unsubstituted linear or branched C 2 -C 10 alkenyl group, or a substituted or unsubstituted linear or branched C 2 -C 10 alkynyl group. 2 . The non-aqueous electrolyte solution additive of claim 1 , wherein R is hydrogen, a substituted or unsubstituted linear or branched C 1 -C 6 alkyl group, a substituted or unsubstituted linear or branched C 2 -C 6 alkenyl group, or a substituted or unsubstituted linear or branched C 2 -C 6 alkynyl group. 3 . The non-aqueous electrolyte solution additive of claim 1 , wherein R 1 and R 2 above are each independently hydrogen, a substituted or unsubstituted linear or branched C 1 -C 6 alkyl group, a substituted or unsubstituted linear or branched C 2 -C 6 alkenyl group, or a substituted or unsubstituted linear or branched C 2 -C 6 alkynyl group.

Linked approaches

Fire-resistant electrolytes

Electrolyte formulations that suppress ignition and heat release.

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