| 摘要 |
PROBLEM TO BE SOLVED: To obtain a lithium ion secondary battery cathodic substance having a cycling stability, high charging electric voltage resistance and high energy density of a secondary battery having a lithium cathode substance. SOLUTION: A proper amount of a selected divalent cation is added to a lithiated transition metal oxide having a rhombohedral R-3m crystal structure to allow all or a part of the divalent cation to occupy crystal lattices in the crystal structure of a transition metal atom layer. The lithiated transition metal oxide can be used as the cathodic substance of a lithium ion secondary battery. The substance includes an Li1+x Ni1+y My Nx O2(1+ X) and Li1 Ni1-y My Nx Op without limited to the compounds. Therein, the transition metal is selected from titanium, vanadium, chromium, manganese, cobalt and aluminum. N is the element of the group II in the periodic table, and is selected from magnesium, calcium, strontium, barium and zinc. |
