锂电池低温电解液和锂电池
By using a mixture of solvents with high dielectric constant, low viscosity and low melting point, along with specific lithium salts and additives, a stable solid electrolyte interface film is formed, solving the performance degradation problem of lithium batteries in low-temperature environments and achieving efficient lithium-ion migration and battery performance maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- INSTITUTE OF PHYSICS CHINESE ACADEMY OF SCIENCES
- Filing Date
- 2021-10-14
- Publication Date
- 2026-07-17
AI Technical Summary
Lithium batteries suffer severe performance degradation at low temperatures, manifested as a decrease in battery discharge capacity, cycle life, and high-power charge and discharge performance, and even lithium plating, leading to safety hazards. Existing technologies offer limited improvement.
A mixed solvent consisting of a high dielectric constant base organic solvent, a low viscosity solvent, and a low melting point solvent, combined with specific lithium salts and electrolyte additives, is used to form a low-temperature electrolyte for lithium batteries with high ionic conductivity and low viscosity. A stable solid electrolyte interface film is formed through low-temperature additives and film-forming additives.
Improving lithium-ion transference number and electrode interface performance in lithium batteries under low-temperature conditions, slowing down battery cycle capacity decay, maintaining performance unaffected at room temperature, and broadening the application scenarios of lithium batteries.
Smart Images
Figure CN115986211B_ABST