The influence of additives on lithium dope / undope reactions for a tin film electrode in a room-temperature ionic liquid electrolyte

摘要

Various organic solvent-based solutions have been widely used as rechargeable lithium battery electrolytes. However, these electrolytes may cause combustion and/or explosion in case of accidents due to their flammability and volatility. Since room-temperature ionic liquids are regarded as nonflammable and nonvolatile, ionic liquid electrolytes are expected to improve safety of rechargeable lithium battery. Among many kinds of ionic liquids, l-butyl-l-methyl-pyrrolidinium bis(trifluoromethylsulfonyl)amide (BMPTFSA) containing LiTFSA has been investigated as a promising electrolyte because of acceptable cathodic stability and conductivity [1-5].