| 摘要 |
A positive electrode material for lithium ion secondary battery that is for high voltage and high capacity uses and ensures high cycle durability and high safety, comprising a granular active substance of positive electrode for lithium ion secondary battery represented by the general formula LiaCobA cBdOcFf (wherein A is Al or Mg; B is a transition element of Group 4; 0.90 <= a <= 1.10; 0.97 <= b <= 1.00; 0.0001 <= c <= 0.03; 0.0001 <= d <= 0.03; 1.98 <= e <= 2.02; 0 <= f <= 0.02; and 0.0001 <= c+d <= 0.03), the element A, the element B and the fluorine uniformly existing in the vicinity of grain surface. |
