| abstract |
Nonaqueous electrolytic liquids for lithium secondary batteries which have flame retardancy (self-extinguishing characteristics) or incombustibility (no flash point), have a high conductivity, and are electrochemically stable. One of the nonaqueous electrolytic liquids comprises a nonaqueous solvent comprising as an essential ingredient at least one phosphate (a) selected among chain phosphoric esters (a1) and cyclic phosphoric esters (a2). The nonaqueous solvent may further contain a cyclic carboxylic ester (b1) and a cyclic carbonic ester (b2). Another nonaqueous electrolytic liquid comprises the nonaqueous solvent and incorporated therein at least either a vinylene carbonate compound (c1) or a vinylethylene carbonate compound (c2) and one or more compounds selected from the group consisting of cyclic amide compounds (d1), cyclic carbamate compounds (d2), and cyclic hetero-compounds (d3). |