| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve energy density and output density while securing durability. <P>SOLUTION: A negative electrode 15 includes a negative electrode current collector 16 in which a through hole 16a is formed, and a negative electrode mixture layer 17 coated on this. Moreover, positive electrodes 13, 14 are arranged so as to pinch the negative electrode 15, a thin positive electrode mixture layer 20 having high input characteristics is formed at one positive electrode 13, and a thick positive electrode mixture layer 22 having high capacity characteristics is formed at the other positive electrode 14. In this way, by combining the positive electrodes 13, 14 different in charge and discharge characteristics, the energy density and the output density of a power storage device 10 become improvable. Moreover, since ions can be moved through the through hole 16a between the positive electrode mixture layers 22, 20, dispersions of positive electrode potential formed between the positive electrodes 13, 14 can be eliminated, and the durability of the storage device can be secured. <P>COPYRIGHT: (C)2009,JPO&INPIT |
