NONAQUEOUS ELECTROLYTE BATTERY AND BATTERY PACK

摘要

According to one embodiment, there is provided a nonaqueous electrolyte battery. The nonaqueous electrolyte battery includes a negative electrode, a positive electrode, and a nonaqueous electrolyte. An Li-atom abundance ratio ALi, Ti-atom abundance ratio ATi, and C-atom abundance ratio AC of a surface of the negative electrode satisfy inequalities 2≦AC/ATi≦10, and 1.0≦ALi/AC≦1.5. The positive electrode includes a nickel-cobalt-manganese composite oxide represented by a composition formula Li1-aNixCoyMnzO2. Subscripts x, y, and z satisfy an inequality 0.1≦x/(y+z)≦1.3, and subscript a satisfies an inequality 0≦a≦1. A ratio p/n of a capacity p of the positive electrode to a capacity n of the negative electrode is within a range of 1.2 to 2.

主权项

1. A nonaqueous electrolyte battery comprising:
a negative electrode including an oxide of titanium in which an Li-atom abundance ratio ALi, Ti-atom abundance ratio ATi, and C-atom abundance ratio AC obtained by subjecting a surface of the negative electrode to a photoelectron spectroscopy measurement satisfy inequalities 2≦AC/ATi≦10, and 1.0≦ALi/AC≦1.5; a positive electrode including a nickel-cobalt-manganese composite oxide which is represented by a composition formula Li1-aNixCoyMnzO2, subscripts x, y, and z satisfy an inequality 0.1≦x/(y+z)≦1.3 and subscript a satisfies an inequality 0≦a≦1; and a nonaqueous electrolyte, wherein a ratio p/n of a capacity p of the positive electrode to a capacity n of the negative electrode is within a range of 1.2 to 2.