Abstract:

The decomposition of traditional lithium-ion batteries at high voltage limit the development of high voltage lithium-ion batteries. Approaches to circumvent these challenges include (1) the design and synthesis of intrinsically stable electrolytes to tolerate high voltages, and (2) looking for suitable electrolyte additives. The latter approach is particularly appealing from the techno-economic perspective to stabilize the electrode/electrolyte interphase. This review summarizes the latest research progress on electrolyte additives for high voltage lithium-ion batteries. According to their types, the additives can be divided into six categories: boron-based additives, organophosphorus additives, carbonate additives, sulfur-based additives, ionic liquid additives, and other additives. The effect and working mechanism of the additives are generally described and discussed. The prospect of the high voltage electrolyte additives used in the future were also analyzed.

Key words: lithium-ion batteries, electrolyte additives, high voltage