| 摘要 |
PROBLEM TO BE SOLVED: To provide a secondary battery with superior input and output characteristics and high energy capacity characteristics.SOLUTION: A secondary battery comprises: an electrolyte; and an electrode member 2 immersed in the electrolyte and used. The electrode member 2 forms electrode pairs 41, 42 that in which a plurality of positive electrodes 10a, 10b having positive electrode active material layers 12, 13 formed on a surface of a positive electrode current collector foil 11, a negative electrode 20 having negative electrode active material layers 22, 23 formed on a surface of a negative electrode current collector foil 21, and separators 30 are stacked between the positive electrodes 10a, 10b and the negative electrode 20, and which is composed of the positive electrode active material layers 12, 13 and the negative electrode active material layers 22, 23 opposed each other through separators 30. Each of electrode pairs 41, 42 has a first electrode pair 41 consisting of a first active material layer having first characteristics of relatively highest output and low capacity, and a second electrode pair 42 consisting of a second active material layer having second characteristics of relatively lowest output and high capacity. |
