| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lithium secondary battery with a large capacity and a high cycle property of which the swelling of an electrode, the wrinkling of a current collector, and the generation of a crack inside an activator thin film are restrained by restraining the influence of the volume change of the activator thin film to the minimum. <P>SOLUTION: The thin film electrode is composed of the current collector 11 made of a metal not alloyed with lithium, and the thin film 12 formed on the current collector containing an element alloyed with lithium, wherein the thin film 12 has convex parts 14 with heights H1 of 2 μm or higher and 20 μm or lower, and a recess part 15. The manufacturing method of the thin film electrode comprises a process of forming the thin film 12 containing an element alloyed with lithium on the surface of the current collector 11 made of a metal not alloyed with lithium, and a process of forming irregularity on the surface of the thin film 12 by pressing the thin film 12 by a metal mesh 13 as an indentation forming member. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
