Nonaqueous electrolyte battery and battery pack
Abstract:
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.
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