| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve output density by enhancing adhesion of a collector and an electrode material layer. <P>SOLUTION: In the secondary battery with a positive electrode and a negative electrode each having an electrode material layer containing an active material and a conductive material formed on the surface of each collector superposed between each other's electrode material layers with an interposition of a separator, and with a nonaqueous electrode material filled between the collectors of the positive electrode and the negative electrode, concaves and convexes are formed on the surface of the collectors 4 of at least either the positive electrode or the negative electrode, and the electrode material layer is formed of a first electrode material 16 filled in concave parts 15 on the surface of the collector, and a second electrode material 17 spread over a whole surface of the collector so as to cover the first electrode material 16, with the first electrode material 16 having a smaller electric resistance than the second electrode material 17. <P>COPYRIGHT: (C)2010,JPO&INPIT |
