| abstract |
It is aimed at providing a nonaqueous electrolyte cell excellent in cell performance in a high-temperature environment. A nonaqueous electrolyte cell comprising a positive electrode and a negative electrode, and produced by using a nonaqueous electrolyte including at least one kind of a cyclic carbonate having a carbon-carbon π bond and at least one kind of a cyclic organic compound having an S═O bond, characterized in n that the positive electrode is constituted of a positive-electrode active material including a main component which is a fired oxide having a layered rock salt type crystal structure represented by Li m [Ni b M (1-b) O 2 ] (M is one or more kinds of elements included in 1 to 16 groups excluding Ni, Li, and O; and 0≦m≦1.1), and in which the value of b is 0<b<1, and n particularly, that the fired oxide has a layered rock salt type crystal structure represented by Li m [Mn a Ni b Co c O 2 ] (0≦m≦1.1, a+b+c=1, |a-b|≦0.05, a≠0, b≠0) in which the value of c is 0≦c<1. |