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Patent Searching and Data


Title:
2次電池集電体用電解銅箔
Document Type and Number:
Japanese Patent JP5588043
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an electrolytic copper foil for a secondary battery collector, which has a small surface roughness, and in which formation of wrinkles after stretching and discolored streaks along the length direction is suppressed by making thickness in the width and length directions uniform.SOLUTION: An electrolytic copper foil for a secondary battery collector has 1.5% or less of difference in foil thickness in the width direction and is free from discolored streaks along the length direction on a surface of the copper foil, wherein the difference in foil thickness in the width direction is 1.4% or less. The electrolytic copper foil for the secondary battery collector has an average surface roughness Rzavg of 2.0 μm or smaller in the width direction on a matte surface and has 50% or less of variation in roughness (Rzmax-Rzmin)/Rzavg.

Inventors:
Michiya Kohiki
Application Number:
JP2013093382A
Publication Date:
September 10, 2014
Filing Date:
April 26, 2013
Export Citation:
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Assignee:
JX day ore Nippon Oil metal incorporated company
International Classes:
C25D1/04; H01M4/66
Attorney, Agent or Firm:
Axis international patent business corporation
Isamu Ogoshi