Non-aqueous electrolyte and battery
By using silicon-based fluorophosphate compounds as additives in lithium batteries, and combining them with ethers and other solvents to construct an interfacial film, the problem of insufficient oxidation stability of ether solvents is solved, the high voltage stability and cycle life of the battery are improved, the battery impedance is reduced, and the high-temperature storage performance is enhanced.
WO2026114126A1PCT designated stage Publication Date: 2026-06-04GUANGZHOU TINCI MATERIALS TECH
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- GUANGZHOU TINCI MATERIALS TECH
- Filing Date
- 2025-11-21
- Publication Date
- 2026-06-04
AI Technical Summary
Technical Problem
The oxidative stability of ether solvents is insufficient to meet the requirements of high-voltage lithium batteries, resulting in low battery cycle life and safety issues.
Method used
Silicon-based fluorophosphate compounds are used as electrolyte additives, combined with ether compounds and other solvents to construct an interface film with high conductivity, rigidity and dense stability, thereby improving the high voltage stability and conductivity of ether electrolytes.
Benefits of technology
It improves the high-voltage stability and cycle life of lithium batteries, reduces battery impedance, and enhances the high-temperature storage stability and cycle performance of batteries.
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Smart Images
Figure CN2025136774_04062026_PF_FP_ABST
Abstract
A non-aqueous electrolyte and a battery. The non-aqueous electrolyte comprises an additive, a first solvent and a second solvent. The additive comprises a silicon-based fluorophosphate compound that is as represented by formula 1, wherein R1, R2 and R3 each independently comprise any one of H, F, a C1-C4 alkyl, a C1-C4 fluoroalkyl, a C2-C4 alkenyl, a C2-C4 fluoroalkenyl, a C2-C4 alkynyl, a C5-C7 cycloalkyl, R4-substituted phenyl and R5-substituted benzyl, R4 and R5 each independently comprise F, a C1-C4 alkyl, a C2-C4 alkenyl, a C2-C4 alkynyl, a C1-C4 fluoroalkyl and a C2-C4 fluoroalkenyl, and R1, R2 and R3 are the same or different. The first solvent comprises an ether compound. The second solvent comprises at least one of a carbonic ester compound, a carboxylic ester compound, a sulfone compound and a nitrile compound.
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