Abstract

Electrolytes play an essential role in determining the safety and electrochemical performance of Li-ion batteries. This work reported a propylene carbonate-based electrolyte with high-concentration Li salt. The fire-retardancy test and thermogravimetric analysis showed that this electrolyte is of high safety. In addition, this electrolyte exhibited superior electrochemical performance as compared with the commercial electrolyte in case of reversible capacity, rate behavior, and cycling stability.