The improvement of rechargeable lithium battery electrolyte performance with additives

The deliberate introduction of additives like 2-methylfuran (2-MeF) is known to improve Li cycleability in cyclic ether electrolytes. The authors found that the proclivity of 2-MeF to polymerize in the bulk electrolyte or on a TiS₂ cathode was inhibited by the addition of reduced oxygen species, such as O₂ ^-/int and OH. Additionally, the polymerization of tetrahydrofuran and dioxolane and the destructive processes initiated by AsF₆^- decomposition to AsF₅ and AsF₃ were inhibited by the introduction of reduced oxygen species, particularly OH^- at the 10 p.p.m. to 100 p.p.m. level