| 摘要 |
Provided is a stainless steel foil for a battery outer packaging, the stainless steel foil having excellent adhesion to resins after cold impact and after immersion in electrolyte solutions, even without a special treatment such as a corona discharge being performed. A stainless steel foil (1) that is for a battery outer packaging, that contains 35 mol% or more of a metal element, which exists as a hydroxide, and 40 mol% or less of SiO2, that has an oxide film (1a) that has a thickness of 2nm or more, and that, in a direction that is orthogonal to a rolling direction, has an arithmetic mean roughness Ra of 0.02 μm or more but less than 0.1 μm. |
