| 摘要 |
PURPOSE:To improve the charge/discharge characteristics and construct a nonaqueous electrolyte secondary battery of high operating performance by enhancing the crystalline characteristics of a positive electrode active material, and generating a state with less change in the structure. CONSTITUTION:A nonaqueous electrolyte secondary battery comprises a negative electrode using lithium or lithium-containing compound as active material, a nonaqueous electrolyte, and a positive electrode using lithium-manganese oxide as active material, which is prepared from a crude material admixture of lithium and manganese subjected to a baking process at 470-600 deg.C followed by rapid cooling, wherein the crystalline structure is such that the half-value width of the diffraction peak at a diffraction angle of 18.6 deg. ranges between 0.29-0.44 deg. according to the X-ray diffraction using CuKalpha rays. |
