Electrolyte Composition for Li-Ion Batteries Under High-Temperature Storage

The patent introduces compounds with specific molecular structures (formulas 1-1 and 1-2) that have particular physical and chemical parameters including solubility characteristics and stability constants. These parameter changes in the electrolyte composition enable simultaneous reduction of initial resistance and suppression of gas generation during high-temperature storage by optimizing the electrochemical properties of the electrolyte solution.

The patent creates a composite electrolyte system by combining compounds represented by formulas (1-1) and (1-2) with other electrolyte components. This composite approach integrates multiple functional materials that work synergistically to reduce initial resistance while suppressing gas generation, achieving a balance between electrical performance and thermal stability that neither component could achieve alone.

The patent optimizes the molecular structure parameters of the electrolyte compounds to achieve a balance between stability and conductivity. By carefully selecting alkyl group configurations in formulas (1-1) and (1-2), the patent adjusts solubility, viscosity, and electrochemical stability parameters to simultaneously improve high-temperature storage performance while maintaining low initial resistance.

The patent applies local quality by designing specific regions in the molecular structure of the electrolyte compounds with different functional characteristics. The compounds have localized functional groups that provide stability in certain regions while maintaining conductivity in other regions, enabling the electrolyte to exhibit both high stability and low resistance properties simultaneously.