Electrolytes for high-voltage lithium batteries

In the aim of achieving higher energy density in lithium (Li) ion batteries (LIBs), both industry and academia show great interest in developing high-voltage LIBs (>4.3 V). However, increasing the charge cutoff voltage of the commercial LIBs causes severe degradation of both the positive electrode materials and convenLiPF6-organocarbonate electrolytes suffer from a short cycle life when operated at higher charge cutoff voltages. In this review, the aging mechanisms associated with high-voltage LIBs are analyzed, and the countermeasures from the electrolyte design are discussed.

Automated summary

In order to achieve higher energy density in lithium-ion batteries, there is great interest in developing high-voltage LIBs (>4.3 V) in both industry and academia. However, increasing the charge cutoff voltage of commercial LIBs can lead to severe degradation of both positive electrode materials and LiPF6-organocarbonate electrolytes. This paper analyzes the aging mechanisms associated with high-voltage LIBs and discusses countermeasures from electrolyte design.