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    • 67. 发明授权
    • Metal foil for collector and method of manufacturing the same, collector for secondary battery and secondary battery
    • 用于集电器的金属箔及其制造方法,二次电池和二次电池的集电器
    • US06447957B1
    • 2002-09-10
    • US09543279
    • 2000-04-05
    • Hiroyuki SakamotoHiroshi TadaToshihisa Tamai
    • Hiroyuki SakamotoHiroshi TadaToshihisa Tamai
    • H01M474
    • H01M4/742H01M4/74H01M6/10
    • A collector for a secondary battery includes a metal foil having throughholes shaped or arranged to achieve an increased hole area ratio to improve an active material's adhesion thereto. A throughhole in the metal foil has a largest dimension of at least 1.55 mm, and the foil has a hole area ratio of at least 40%, and a thickness of at least 5 &mgr;m and at most 200 &mgr;m. The throughhole has a peripheral shape including two substantially straight sides that extend along lines intersecting with each other on their respective extensions to form an acute angle at a corner of the throughhole. To form the metal foil, a resist film with a predetermined pattern is arranged on a solid foil, and is used as a mask to etch the foil to provide the plurality of throughholes penetrating the foil.
    • 二次电池用集电体包括金属箔,其具有形成或布置成具有增加的孔面积比的通孔,以改善活性材料与其的附着力。 金属箔中的通孔具有至少1.55mm的最大尺寸,并且箔的孔面积比至少为40%,厚度为至少5μm且至多为200μm。 通孔具有周边形状,其包括两个基本上直的侧面,该两个基本上直的边沿它们各自的延伸线彼此相交的线延伸,以在通孔的角部处形成锐角。 为了形成金属箔,将具有预定图案的抗蚀剂膜布置在固体箔上,并用作掩模以蚀刻箔以提供穿透箔的多个通孔。