| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a battery electrode which improves the initial discharge capacity and charging/discharging cycle characteristics considering difference in the form of an electrode when formed and used and is well suited for a lithium ion secondary battery or the like, to provide a manufacturing method for the battery electrode, and to provide a secondary battery using the battery electrode. <P>SOLUTION: A lithium ion secondary battery is manufactured which contains materials with large energy capacity including elemental substances of silicon or tin and their compounds as active materials in a negative electrode active material layer forming a negative electrode. In this case, an electrolytic copper foil with roughly processed top surface is used as a negative electrode collector 12 to form the active material layer on the negative electrode collector 12, where an active material layer formation surface is held in the concave surface shape against a vapor deposition source 3. <P>COPYRIGHT: (C)2008,JPO&INPIT |
