Super long cycle electrolyte for supercapacitor based on ionic liquid and ethylene carbonate synergistically regulated stable CEI membrane
By synergistically regulating the CEI membrane with acetonitrile and ethylene carbonate, the problem of insufficient stability of supercapacitor electrolyte under high voltage is solved, achieving long cycle life and high performance under high temperature and high pressure, which is suitable for new energy vehicles and grid energy storage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-16
- Publication Date
- 2026-06-12
AI Technical Summary
Existing supercapacitor electrolytes lack stability under high voltage, resulting in low energy density and insufficient energy storage capacity. Furthermore, pure ionic liquids have high viscosity and high cost, limiting their application in high-power characteristics and long cycle life.
Acetonitrile, 1-n-butyl-1-methylpyrrolidine di(trifluoromethanesulfonyl)imide (PYR14-TFSI), and ethylene carbonate were used to synergistically regulate and stabilize the CEI film, forming a dense and uniform CEI film. The high electrochemical stability of the ionic liquid and the film-forming aid properties of ethylene carbonate were used to optimize the interfacial stability and ion transport.
It achieves an ultra-long cycle life under high temperature and high pressure, combines high ionic conductivity and low cost, adapts to electrolytes with a wide temperature range, and improves the energy density and power density of supercapacitors, making it suitable for new energy vehicles, grid energy storage and portable electronic devices.
Smart Images
Figure CN122202070A_ABST