Gel polymer electrolyte and lithium secondary battery comprising same
The gel polymer electrolyte with a crosslinked polymer and fluorinated linear alkyl phosphate compound addresses lithium dendrite growth and flammable electrolyte issues, enhancing battery safety and performance.
WO2026111116A1PCT designated stage Publication Date: 2026-05-28SAMSUNG SDI CO LTD
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Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- SAMSUNG SDI CO LTD
- Filing Date
- 2025-09-03
- Publication Date
- 2026-05-28
AI Technical Summary
Technical Problem
Lithium-ion rechargeable batteries face limitations in energy density and safety due to lithium dendrite growth and flammable electrolytes, leading to safety issues and reduced lifespan.
Method used
A gel polymer electrolyte comprising a crosslinked polymer, fluorinated linear alkyl phosphate compound, and lithium salt is used, which forms a stable SEI film, enhancing safety and ionic conductivity.
Benefits of technology
The gel polymer electrolyte improves battery safety, capacity retention, and lifespan by preventing dendrite growth and extinguishing combustion reactions.
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Smart Images
Figure KR2025013547_28052026_PF_FP_ABST
Abstract
According to an embodiment of the present disclosure, aiming to resolve a technical problem, this gel polymer electrolyte comprises a crosslinked polymer, a fluorinated linear alkyl phosphate compound, a lithium salt, and an organic solvent, wherein the total content of the crosslinked polymer is 3-50 wt % relative to the total weight of the gel polymer electrolyte, and the total content of the fluorinated linear alkyl phosphate compound is 3-20 wt % relative to the total weight of the lithium salt, the organic solvent, and the fluorinated linear alkyl phosphate compound.
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