Powerful qua-functional electrolyte additive for lithium metal batteries

Abstract

Lithium metal batteries (LMBs) have attracted tremendous research attention because of the high theoretical capacity (3860 mAh g−1) and the lowest electrochemical potential (−3.04 V vs. standard hydrogen electrode). However, the Lithium dendrites, forming from plating/stripping processes, cause the excessive consumption of electrolyte and active Li and the puncture on the separator. This limits the commercialization of LMBs. Recently, Ma's group proposed heptafluorobutyric anhydride (HFA) as qua-functional electrolyte additive and verified the protection mechanism from the structure and electrochemical properties. Such results creatively put forward qua-functional electrolyte additive for the improvement of LMBs and provides good experience for the exploration of multi-functional additive, inspiring researchers to explore new multi-functional electrolyte additives in future.