To provide a secondary battery having high capacity and an excellent cycle characteristic by using a negative electrode constituted by applying a negative electrode active material capable of storing and releasing a lithium ion to outside both surfaces of its current collecting bodies by sandwiching metallic lithium between plural conductive porous current collecting bodies.
A negative electrode 4 is obtained in such a way that a negative electrode active material 2 capable of storing and releasing a lithium ion is applied to a surface of a porous current collecting body 1, and metallic lithium 3 is press-fitted to the reverse, and the metallic lithium 3 side is put on the inside, and is bent from the center. The press-fitted metallic lithium 3 is uniformly dispersed in a negative electrode active material layer 2 by passing through a pore of the porous current collecting body 1. Therefore, since the whole reverse of the porous current collecting body 1 can be used as a position to which the metallic lithium 3 is stuck, a sufficient quantity of lithium can be replenished. It is better to form the porous current collecting body 1 of conductive porous metallic foil, for example, a copper punching sheet.
KAWAMURA YUMIKO
FUJII TAKAFUMI
