Triazole Phosphate Electrolyte Additive for Hot Lithium Batteries

The patent introduces a fluorinated cyclic carbonate compound as an intermediary substance in the electrolyte that mediates between the high-capacity electrodes and the high-temperature environment. This compound preferentially decomposes to form a protective interface layer that prevents direct harmful interactions between the electrodes and electrolyte at high temperatures, thereby maintaining stability while preserving the high capacity benefits of the electrode materials.

The patent modifies the chemical composition parameters of the electrolyte by incorporating fluorinated cyclic carbonate compounds with specific molecular structures (containing F, C=O, and cyclic carbonate groups). This parameter change in the electrolyte composition alters the decomposition behavior and interface formation characteristics, enabling the system to maintain high-temperature stability without sacrificing the high capacity of the electrodes.

The patent changes the chemical structure parameters of the electrolyte additive by using fluorinated cyclic carbonate compounds instead of conventional additives. The fluorination and cyclic carbonate structure provide specific decomposition characteristics that simultaneously suppress gas generation and maintain low resistance at high temperatures, overcoming the limitations of conventional additives.

The patent creates a composite protective interface layer through the decomposition of fluorinated cyclic carbonate compounds that combines multiple beneficial properties: gas suppression, resistance control, and thermal stability. This composite effect at the electrode-electrolyte interface achieves multiple functions simultaneously that conventional single-function additives cannot provide.