Nonaqueous electrolyte battery and battery pack
AssigneeKabushiki Kaisha Toshiba
InventorsNorio Takami, Wen Zhang, Hiroki Inagaki
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Abstract
According to one embodiment, a nonaqueous electrolyte battery including a positive electrode and a negative electrode is provided. The positive electrode includes LiNixM1-xO2 wherein M is a metal element including Mn, and x is within a range of 0.5≦x≦1. The negative electrode includes graphitized material particles and a layer. The graphitized material particles have an interplanar spacing of (002), according to an X-ray diffraction method, of 0.337 nm or less. The layer includes a titanium-containing oxide. The layer covers at least a part of a surface of the graphitized material particles.
Claims21
A nonaqueous electrolyte battery comprising:
- a positive electrode;
- a negative electrode comprising graphitized material particles having an interplanar spacing of (002), according to an X-ray diffraction method, of 0.337 nm or less as a negative electrode active material, and a layer which comprises a titanium-containing oxide of the formula Li4/3+aTi5/3O4 wherein 0<a≦2 and covers at least a part of a surface of the graphitized material particles;
- and
- a nonaqueous electrolyte,
- wherein the graphitized material particles satisfy the following formula (1):
- 0≦Ir/Ih≦0.1 (1)
- wherein Ih is an intensity of a (101) diffraction peak of a hexagonal system of the graphitized material particles according to an X-ray diffraction method, and Ir is an intensity of a (101) diffraction peak of a rhombohedral system of the graphitized material particles according to the X-ray diffraction method.
Dependencies are inferred from the claim text.