Non-Aqueous Liquid Electrolytes for Li-O2 Batteries

Abstract

Li-O₂ batteries (LOBs) have become a research hotspot of energy storage devices because of its high theoretical energy density. Practical applications require that non-aqueous LOBs can deliver stable and high reversible capacity, which heavily depends on the appropriate electrolyte system. Therefore, it is very important to select electrolytes that are hard to decompose and conducive to modulating the growth kinetics of discharge products. Herein, we will review the current progress and challenges of non-aqueous liquid electrolytes for LOBs by analyzing the influence factors on electrolyte stability and introducing the design and modification methods of electrolytes with different solvent types. At last, the possible research tactics have been proposed to develop advanced electrolytes for improving electrochemical performance of LOBs.