Metallic lithium as the anode material in batteries offer extraordinarily high specific capacity and low electrochemical potential, allowing lithium metal batteries (LMBs) to achieve gravimetric energy densities unobtainable by traditional intercalation-based chemistry. However, one must control the morphology and composition of its solid electrolyte interphase (SEI) in order to suppress the growth of separator-piercing Li dendrites and combat electrolyte depletion. Here, we find the usage of small amounts of organofluorine additives to the commercial ethylene carbonate and diethyl carbonate (EC-DEC) electrolyte mixture improves the specific capacity and capacity retention (>99% over 100 cycles at C/3 rate) of LiNi8.15Co1.5Al0.35O2 (NCA) LMB cells. Esters, carboxylic acids, and ketoesters with various degrees of fluorination were explored as potential electrolyte additives. Figure 1