| 摘要 |
<P>PROBLEM TO BE SOLVED: To easily prevent the capacity of a lithium secondary battery from being reduced since a surface of a thin film of a negative electrode active material is oxidized when manufacturing a negative electrode for the lithium secondary battery in which the thin film of the negative electrode active material is formed on a negative electrode current collector. <P>SOLUTION: The method includes: a step of forming the thin film 1b of the negative electrode active material by discharging the negative electrode active material to store or release lithium into a gas phase under a reduced pressure, and supplying it on the lengthy sheet state negative electrode current collector 1a; and a step of winding up the negative electrode current collector in which the thin film of the negative electrode active material is formed. Before winding up the negative electrode current collector in which the thin film of the negative electrode active material is formed, the negative electrode current collector is cooled down to a temperature lower than room temperature, and an inert gas is adsorbed on a surface of the thin film of the negative electrode active material. <P>COPYRIGHT: (C)2009,JPO&INPIT |
