公开(公告)号：US10658655B2

公开(公告)日：2020-05-19

申请号：US16113479

申请日：2018-08-27

Applicant: KCF Technologies Co., Ltd.

Inventor： Young Wook Chae ,  Young Hyun Kim ,  Shan Hua Jin

IPC: H01M4/66 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/04 ,  C25D3/38 ,  C25D5/56 ,  C25D1/04 ,  H01M4/02 ,  H01M10/0525 ,  H01M4/133 ,  H01M4/36

Abstract: Disclosed is a copper foil including a copper layer having a matte surface and a shiny surface, wherein the copper foil has a first surface of a direction of the matte surface of the copper layer and a second surface of a direction of the shiny surface of the copper layer, wherein a dynamic friction coefficient of the first surface is designated by μk1 and a dynamic friction coefficient of the second surface is designated by μk2. A ratio of three-dimensional surface area to two-dimensional surface area of the first surface is designated by Fs1, a ratio of three-dimensional surface area to two-dimensional surface area of the second surface is designated by Fs2.