Active material, nonaqueous electrolyte battery, battery pack and battery module
摘要
說明書
In an X-ray diffraction diagram for the composite oxide represented by the general formula of Li2+wNa2?xM1yTi6?zM2zO14+δ, obtained by a powder X-ray diffraction using Cu—Kα rays, it is preferable that an intensity ratio IL/IH is within a range of 2.25≤IL/IH≤3.50, wherein IL is an intensity of a strongest diffraction peak appearing in a range of 17°≤2θ≤18.5°, and IH is an intensity of a strongest diffraction peak appearing in a range of 18.5°<2θ≤19.5°.
A composite oxide according to another example of the preferable aspects in which the intensity ratio IL/IH is within a range of 2.25≤IL/IH≤3.5 in an X-ray diffraction diagram of a composite oxide, obtained according to a powder X-ray diffraction, is a composite oxide having an orthorhombic crystal structure belonging to a space group Fmmm. In such a composite oxide, in the X-ray diffraction diagram of the composite oxide obtained by the powder X-ray diffraction using Cu—Kα rays, an intensity ratio is within a range of 2.25≤IL1/IH1≤3.5, wherein IL1 is an intensity of a diffraction peak corresponding to a (111) plane, and IH1 is an intensity of a diffraction peak corresponding to a (202) plane.
In the crystal structure shown in
