| 摘要 |
PROBLEM TO BE SOLVED: To provide a negative electrode excellent in adhesion and charge/discharge cycle characteristics.SOLUTION: In the present invention, a lithium ion secondary battery negative electrode is used. The lithium ion secondary battery negative electrode includes: a negative electrode active material layer mainly containing silicon or a silicon oxide; at least one binder selected from polyamide-imide and polyimide; and a negative electrode collector which contains at least phosphorous and at least one element selected from the group consisting of zinc, chromium and nickel, in the depth direction from a surface to a depth of 10 nm, and comprises a copper foil. |
