NON-AQUEOUS ELECTROLYTE COMPOSITIONS COMPRISING LITHIUM BIS(FLUOROSULFONYL)IMIDE

Disclosed are electrolyte compositions comprising a fluorinated acyclic carboxylic acid ester, lithium bis(fluorosulfonyl)imide (also called LiFSI); and at least one electrolyte salt. The electrolyte compositions are useful in electrochemical cells, such as lithium-ion batteries.