Secondary battery of improved lithium ion mobility and cell capacity

The invention is to the discharge of the positive electrode active material that acts sequentially redox levels to exhibit excellent discharge characteristics at high-rate discharge range of different two or more active material in, preferably includes, their particle size different active material and in, private minimal (dead volume) improve the discharge characteristics at high-rate discharge Sikkim range and at the same time, provides a secondary battery, the capacity is increased with an increase in the improvement of the electrode density and loading amounts.