Liquid electrolyte composition for lithium metal secondary battery and lithium metal secondary battery having such liquid electrolyte composition

摘要

The present invention relates to a liquid electrolyte formulation for a lithium metal secondary battery comprising:- a conductive lithium salt which is selected from the group comprising LiTFSI, LiFSI, LiCI, LiF, LiCN, LiCN, LiNs, LiNO, LiNO, LiBF, LiPF, LiAsF, LiSbF, LiAlCl- a first ionic liquid having the formula (CATION)FSI, wherein CATION is a quaternary alkyl ammonium cation selected from the group comprising (RRR)Nand (RR)N, where Rand R, which may be identical or different, form an heterocycle containing Cto Clinear or branched alkyl chains, Rand R, which may be identical or different, are linear or branched Cto Calkyl chain,- a second ionic liquid as anti-corrosion agent, said second ionic liquid having the formula (CATION)(ANION) where (CATION) is defined as above and (ANION) is an anion comprising at least one nitrile functionality.The present invention relates also to a process for preparing such liquid electrolyte formulation and a lithium metal secondary battery comprising said liquid electrolyte formulation.