| 摘要 |
This nonaqueous electrolyte secondary battery comprises a positive electrode, a negative electrode, a nonaqueous electrolyte and a separator, and is characterized in that: the positive electrode comprises a collector and a positive electrode mixture layer that is formed on the collector; the positive electrode mixture layer contains a positive electrode active material and a binder; the positive electrode active material contains a lithium/nickel-containing composite oxide that contains nickel and cobalt and/or manganese; the lithium/nickel-containing composite oxide has a nickel ratio of 30 mol% or more when the amount of elements other than lithium and oxygen is taken as 100 mol%; the binder contains a vinylidene fluoride-chlorotrifluoroethylene copolymer; a heat-resistant fine particle layer, which contains heat-resistant fine inorganic particles and a binder, is arranged between the positive electrode and the negative electrode; and the upper limit voltage for charging is set to 4.3 V or more. |
