Stable cyclic ether as an electrolyte additive for high-performance lithium metal batteries

Abstract

Introducing a methyl group into 1,3-dioxolane (DOL) to obtain a stable cyclic ether, 4-methyl-1,3-dioxolane (4-Me DOL), allows it to be used as an additive in LiPF₆-based carbonate electrolytes. The addition of 4-Me DOL can form a stable SEI with good Li⁺ transport ability, which can simultaneously improve the rate capability and cycling performance of lithium metal batteries.