| 摘要 |
A positive electrode material for a lithium secondary cell for high voltage high capacity use exhibiting high cycle durability and high safety. The positive electrode material is composed of particles having a composition represented by the general formula: LiaCobMgcAdOeF f (wherein a represents a group VI transition element or group XIV element, and 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, 0.0001<=c+d<=0.03), and magnesium, the element A and fluorine exist uniformly in the vicinity of the surfaces of the particles. |
