| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery which enables the suppression of short circuit of positive and negative electrodes, and which is hard to cause thermorunaway and superior in safety.SOLUTION: A nonaqueous electrolyte secondary battery comprises: a nonaqueous electrolytic solution; a positive electrode; a negative electrode; a separator provided between the positive and negative electrodes, and composed of a micro porous film including a thermoplastic resin as a main constituent; and a filler layer provided between the positive and negative electrodes, and including an inorganic filler as a main constituent. The nonaqueous electrolytic solution includes an electrolyte and a liquid composition. At least one kind of the electrolyte is a lithium salt. The liquid composition includes: at least one kind of fluorine-containing solvent (A) selected from a group consisting of a fluorine-containing ether compound, a fluorine-containing chain carboxylic acid ester compound and a fluorine-containing chain carbonate compound; and a cyclic carboxylic acid ester compound (B).SELECTED DRAWING: None |
