A non-aqueous electrolyte, a lithium ion battery, a battery module, a battery pack, and a power utilization device
By using specific electrolyte additives to form a stable interface film in lithium-ion batteries, the problems of volume expansion and SEI film rupture of silicon anode materials in lithium-ion batteries are solved, thereby improving the cycle life and high-temperature performance of the battery.
Patent Information
- Application Number
- CN202511862561.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-11
- Publication Date
- 2026-05-01
- Estimated Expiration
- 2045-12-11
AI Technical Summary
In existing lithium-ion batteries, the silicon anode material generates internal stress during the lithium-ion deintercalation and intercalation process, which leads to volume expansion, damages the material structure, causes repeated growth and rupture of the SEI film, consumes lithium ions, and affects cycle stability and lifespan. In addition, existing electrolyte additives are prone to vaporization at high temperatures, which affects battery performance.
A non-aqueous electrolyte additive containing 1,3-propanesulfonate lactone, fluoroethylene carbonate, vinylene carbonate, lithium tetrafluoroborate, and compound of formula I (N-[3-(trimethoxysilyl)propyl]-2-acrylamide) is used to form a stable interfacial film, inhibit electrolyte consumption, reduce interfacial side reactions, and improve the cycle life of lithium-ion batteries.
A stable interfacial film is formed on the positive and negative electrode surfaces, which improves Li+ transport capability, reduces impedance, enhances interfacial stability, extends battery cycle life and stability, and improves high-temperature performance.