ELECTROLYTIC COPPER FOIL, METHOD OF MANUFACTURING THE SAME, AND LITHIUM ION SECONDARY BATTERY

To provide an electrolytic copper foil, a method of manufacturing the electrolytic copper foil, and a lithium ion secondary battery.SOLUTION: An electrolytic copper foil includes a raw foil layer having a first surface and a second surface facing the first surface. According to X-ray diffraction spectrum of the first surface, a ratio value between the diffraction peak intensity I (200) of a (200) crystal surface in the first surface and the diffraction peak intensity I (111) of a (111) crystal surface in the first surface is in the range of 0.5 to 2.0. According to X-ray diffraction spectrum of the second surface, a ratio value between the diffraction peak intensity I (200) of the (200) crystal surface in the second surface and the diffraction peak intensity I (111) of the (111) crystal surface in the second surface is in the range of 0.5 to 2.0.SELECTED DRAWING: Figure 2 【課題】本発明は電解銅箔、その製造方法、及びリチウムイオン二次電池を開示する。【解決手段】電解銅箔は、第１表面と、第１表面に対合する第２表面とを有する生箔層を含む。第１表面のＸ線回折スペクトルにおいて、第１表面における（２００）結晶面の回折ピーク強度Ｉ（２００）と第１表面における（１１１）結晶面の回折ピーク強度Ｉ（１１１）の比値が０．５から２．０の間である。第２表面のＸ線回折スペクトルにおいて、第２表面における（２００）結晶面の回折ピーク強度Ｉ（２００）と第２表面における（１１１）結晶面の回折ピーク強度Ｉ（１１１）の比値も０．５から２．０の間である。【選択図】図２