| 摘要 |
<p>Provided is an electrolytic copper foil, especially an electrolytic copper foil useful for a secondary battery negative electrode collector, having a high tensile strength in an ordinary state, a surface roughness (Rz) of 2.0 µm or less, and a small number of projections due to abnormal electrodeposition. The electrolytic copper foil is characterized in that the tensile strength in an ordinary state (referred to below as "ordinary-state tensile strength") is 45 kgf/mm2 to 70 kgf/mm2, the number of projections caused by abnormal electrodeposition and having a height of 1.0 µm or more and a diameter of 4.0 µm or more is 20/cm2 or less, and the surface roughness (Rz) is 2.0 µm or less.</p> |
