| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery, wherein a collector can be sufficiently deformed along an active material surface, the contact between an active material and the collector can be properly kept, excellent in a charging/discharging cycle, and inexpensive. SOLUTION: Negative electrodes 6, consisting of an electrode constituting material layer 5, are provided on both surfaces of plane-like collectors 4 of the negative electrodes 6 are composed of electrolyte metallic foil formed of the electrolyte deposit of metal. In the electrolyte metallic foil, the surface roughness of one side main surface is smaller than 3.0μm in terms of a mean roughness of 10 points, and the difference of the surface roughness, between this and the other side main surfaces is smaller than 2.5μm in terms of a mean roughness of 10 points.
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