Method for producing titanium foil or titanium sheet, and cathode electrode

Patent metadata

Field	Value
Publication number	US-2020385881-A1
Application number	US-201816490289-A
Country	US
Kind code	A1
Filing date	Mar 1, 2018
Priority date	Mar 1, 2017
Publication date	Dec 10, 2020
Grant date	—

Abstract

A titanium foil or a titanium sheet is produced by electrodeposition from molten salt using constant current pulse, the method comprising: forming an electrodeposited titanium film on a surface of a cathode electrode made of glassy carbon, graphite, Mo, and Ni, and separating thereafter the electrodeposited titanium film from the cathode electrode by performing one or both of applying an external force to the electrodeposited titanium film and removing the cathode electrode. This enables the electrodeposited titanium film electrodeposited on the cathode electrode to be peeled from the cathode electrode simply and at low cost.

First claim

1 . A method for producing a titanium foil or a titanium sheet by electrodeposition from molten salt using constant current pulse, the method comprising:
forming an electrodeposited titanium film on a surface of a cathode electrode made of one or more kinds selected from glassy carbon, graphite, Mo, and Ni, and thereafter separating the electrodeposited titanium film from the cathode electrode by performing one or both of a process of applying an external force to the electrodeposited titanium film and a process of removing at least a portion of the cathode electrode.

2 . The method for producing a titanium foil or a titanium sheet according to claim 1 , wherein the process of removing comprises a step of:
removing by physical means or chemical means.

3 . The method for producing a titanium foil or a titanium sheet according to claim 1 , wherein the separating process comprises steps of:
grasping directly a portion of the electrodeposited titanium film and peeling the electrodeposited titanium film from the cathode electrode, or bonding a separation member to a portion of the electrodeposited titanium film, grasping the separation member, and peeling the electrodeposited titanium film from the cathode electrode.

4 . The method for producing a titanium foil or a titanium sheet according to claim 1 , wherein the separating process comprises steps of: on an interface between the electrodeposited titanium film and the cathode electrode,
removing a portion of the cathode electrode to form a grasping portion in the portion of the electrodeposited titanium film, and thereafter, peeling the electrodeposited titanium film from the cathode electrode with the grasping portion as a starting point, or bonding a separation member to the grasping portion and then peeling the electrodeposited titanium film from the cathode electrode with the separation member as the starting point.

5 . A cathode electrode used for obtaining a titanium foil or a titanium sheet by electrodepositing titanium by electrodeposition from molten salt using constant current pulse, wherein at least a surface of the cathode electrode for the electrodeposition of titanium is made of one or more kinds selected from glassy carbon, graphite, Mo, and Ni.

6 . The method for producing a titanium foil or a titanium sheet according to claim 2 , wherein the separating process comprises steps of:
grasping directly a portion of the electrodeposited titanium film and peeling the electrodeposited titanium film from the cathode electrode, or bonding a separation member to a portion of the electrodeposited titanium film, grasping the separation member, and peeling the electrodeposited titanium film from the cathode electrode.

7 . The method for producing a titanium foil or a titanium sheet according to claim 2 , wherein the separating process comprises steps of: on an interface between the electrodeposited titanium film and the cathode electrode,
removing a portion of the cathode electrode to form a grasping portion in the portion of the electrodeposited titanium film, and thereafter, peeling the electrodeposited titanium film from the cathode electrode with the grasping portion as a starting point, or bonding a separation member to the grasping portion and then peeling the electrodeposited titanium film from the cathode electrode with the separation member as the starting point.

Assignees

• Univ Kyoto
• Nippon Steel Corp

Inventors

• Uda Tetsuya
• Funatsu Kouhei
• Kishimoto Akihiro
• Mori Kenichi
• Fujii Hideki

Classifications

• C25D1/20

  Separation of the formed objects from the electrodes {with no destruction of said electrodes} · CPC title

• C25D1/04 Primary

  Wires; Strips; Foils · CPC title

• C22C14/00

  Alloys based on titanium · CPC title

• C25C7/025

  used in cells for the electrolysis of melts · CPC title

• C25C3/28

  of titanium · CPC title