| 摘要 |
PURPOSE:To enhance overdischarge characteristics of a nonaqueous secondary battery by using a specific positive electrode main active material, and using composite oxides of lithium and copper as positive electrode auxiliary active material. CONSTITUTION:LixMyNzO2 (M is one kind of transition metal, N is one kind of non-transition metal, x, y, z are 0.05<=x<=1.10, 0.85<=y<=1.00, 0<=z<=0.10) is used as positive electrode main active material and composite oxides of lithium and copper as positive electrode auxiliary active material. For example, Co, Ni, Fe etc., can be mentioned as M and Al, In, Sn etc., as N. The value of (x) fluctuates with charge and discharge conditions within the range 0.05<=x<=1.10, and when the value of (y) is less than 0.85 or exceeds 1.00, phenomena such as deterioration of cycle properties, a rise in over voltage, etc., occur and when the value of (z) exceeds 0.10 basic characteristics as active material for secondary batteries are damaged. Overdischarge characteristics of a nonaqueous secondary battery are thereby enhanced. |
