| 摘要 |
PURPOSE: To obtain a nonaqueous electrolyte battery which has an excellent preserving property and large energy density, by covering a center layer which consists of a compound to store and discharge an alkaline metal, by a surface layer which consists of compound different from the center layer. CONSTITUTION: The surface of a center layer consisting of compound which can store and discharge alkaline metal reversely is covered by a surface layer consisting of at least one sort of compound different from the center layer, to form a positive electrode active material. This positive electrode 1 is pressure contacted to a positive electrode can 4 attaching a positive electrode collector 6. On the other hand, a negative electrode 2 is pressure contacted to a negative electrode can 5 through a negative electrode collector 7. A nonaqueous electrolyte battery is formed by using the positive electrode 1, the negative electrode 2, electrolyte liquid, and a separator 3. The compound of the center layer of the positive electrode active material is made by oxide having at least the α-NaFeO2 structure or oxide having a spinal structure. As compound to form the surface layer, metal oxide, boride, carbide, or the like is used. |
