ELECTROLYTE SOLUTIONS FOR ELECTROCHEMICAL ENERGY DEVICES

摘要

Electrolyte solutions for an electrochemical energy device, including a lithium secondary battery, comprising (a) a supporting electrolyte salt and (b) a solvent composition comprising (1) at least one of a cyclic carbonic acid ester solvent and (2) at least one fluorine-containing solvent having a boiling point of at least 80° C., selected from among the following chemical formulas (i) to (iii): (i) R₁-O-R_f1; (ii) R₂-O-(R_f2-O)_p-(R_f3-O)_q-R₃; (iii) A-(O-R_f4)_m (where the definition of each formula is as described in the claim)