Electrolytes for lithium secondary batteries and lithium secondary batteries containing the same
The use of a sulfonyl-based compound with a cyano group in the electrolyte for lithium secondary batteries forms a protective SEI, addressing stability and lifespan issues by stabilizing electrode interfaces and improving high-voltage and high-temperature performance.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- SK ON CO LTD
- Filing Date
- 2025-12-24
- Publication Date
- 2026-07-10
AI Technical Summary
Lithium secondary batteries experience reduced stability and lifespan due to side reactions between the positive electrode active material and the electrolyte during repeated charging and discharging, particularly at high voltages and temperatures.
Incorporation of a sulfonyl-based compound containing a cyano group and a lithium salt into the electrolyte, which forms a uniform and highly ionically conductive solid electrolyte interface (SEI) on the electrode surfaces, stabilizing the electrode interfaces and suppressing side reactions.
The electrolyte improves high-voltage and high-temperature characteristics of lithium secondary batteries by forming protective films on the electrodes, reducing decomposition, gas generation, and minimizing performance degradation, thereby enhancing cycle life.
Smart Images
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