| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery superior in performance balance. SOLUTION: This nonaqueous electrolyte secondary battery 1 is equipped with a positive electrode 3 having a positive-electrode mix layer, including at least, a binder of fluororubber, a positive-electrode active material and a conductive assistant, the fluororubber is a copolymer having, as monomers, vinylidene fluoride(VDF), hexafluoropropylene(HFP), and tetrafluoroethylene(TFE), and the monomer composition ratio is, 45.0 to 55.0 wt.% for vinylidene fluoride, 25.0 to 35.0 wt.% for hexafluoropropylene, and 15.0 to 25.0 wt.% for tetrafluoroethylene. |
