Jig for laminate production, method for laminate production, package, laminate, electrolyzer, and method for producing electrolyzer

Patent metadata

Field	Value
Publication number	US-2022025525-A1
Application number	US-201917277343-A
Country	US
Kind code	A1
Filing date	Sep 20, 2019
Priority date	Sep 21, 2018
Publication date	Jan 27, 2022
Grant date	—

Abstract

A jig for laminate production for producing a laminate of an electrode for electrolysis and a membrane, the jig containing:
a roll for electrode around which an elongate electrode for electrolysis is wound, and a roll for membrane around which an elongate membrane is wound.

First claim

1 . A jig for laminate production for producing a laminate of an electrode for electrolysis and a membrane, the jig for laminate production comprising:
a roll for electrode around which an elongate electrode for electrolysis is wound, and a roll for membrane around which an elongate membrane is wound.

2 . The jig for laminate production according to claim 1 , further comprising a water retention section that supplies moisture to at least one of the roll for electrode, the roll for membrane, the electrode for electrolysis rolled out from the roll for electrode, and the membrane rolled out from the roll for membrane.

3 . (canceled)

4 . The jig for laminate production according to claim 2 , wherein the water retention section comprises a spray nozzle.

5 . (canceled)

6 . The jig for laminate production according to claim 1 , further comprising a positioning section for fixing relative positions of the roll for electrode and the roll for membrane.

7 . The jig for laminate production according to claim 6 , wherein the positioning section presses the roll for electrode and the roll for membrane to each other by means of a spring.

8 - 11 . (canceled)

12 . A method for producing a laminate of an electrode for electrolysis and a membrane, comprising:
rolling out an elongate electrode for electrolysis from a roll for electrode around which the electrode for electrolysis is wound, and rolling out an elongate membrane from a roll for membrane around which the membrane is wound.

13 - 16 . (canceled)

17 . The method for producing the laminate according to claim 12 , further comprising supplying moisture to the electrode for electrolysis rolled out from the roll for electrode.

18 . The method for producing the laminate according to claim 12 , wherein the electrode for electrolysis and membrane, which have been in a wound state, are each rolled out in a state where relative positions of the roll for electrode and the roll for membrane are fixed.

19 . A package comprising:
a roll for electrode around which an elongate electrode for electrolysis is wound and/or a roll for membrane around which an elongate membrane is wound, and a housing storing the roll for electrode and/or the roll for membrane.

20 . A laminate comprising:
an electrode for electrolysis, and a membrane laminated on the electrode for electrolysis, wherein the membrane has an asperity geometry on the surface thereof, and a ratio a of a gap volume between the electrode for electrolysis and the membrane with respect to a unit area of the membrane is more than 0.8 μm and 200 μm or less.

21 . The laminate according to claim 20 , wherein a height difference, which is a difference between a maximum value and a minimum value in the asperity geometry, is more than 2.5 μm.

22 - 27 . (canceled)

28 . An electrolyzer comprising the laminate according to claim 20 .

29 . A method for producing a new electrolyzer by arranging a laminate in an existing electrolyzer comprising an anode, a cathode that is opposed to the anode, and a membrane that is arranged between the anode and the cathode, the method comprising:
replacing the membrane in the existing electrolyzer by the laminate, wherein the laminate is the laminate according to claim 20 .

30 . A method for producing a new electrolyzer by arranging an electrode for electrolysis in an existing electrolyzer comprising an anode, a cathode that is opposed to the anode, a membrane arranged between the anode and the cathode, and an electrolytic cell frame comprising an anode frame that supports an the anode and a cathode frame that supports the cathode, the electrolytic cell frame storing the anode, the cathode, and the membrane by integrating the anode frame and the cathode frame, the method comprising:
a releasing process (A1) of releasing the integration of the anode frame and the cathode frame to expose the membrane, an arranging process (B1) of arranging the electrode for electrolysis on at least one of surfaces of the membrane after the releasing process (A1), and an integrating process (C1) of integrating the anode frame and the cathode frame after the arranging process (B1) to store the anode, the cathode, the membrane, and the electrode for electrolysis into the electrolytic cell frame.

31 . The method for producing the electrolyzer according to claim 30 , wherein, before the arranging process (B1), the electrode for electrolysis and/or the membrane is moistened with an aqueous solution.

32 . (canceled)

33 . The method for producing the electrolyzer according to claim 30 , wherein, in the arranging process (B1), the electrode for electrolysis is positioned such that a conducting surface on the membrane is covered with the electrode for electrolysis.

34 . (canceled)

35 . The method for producing the electrolyzer according to claim 30 , wherein, in the arranging process (B1), a wound body obtained by winding the electrode for electrolysis is used.

36 . The method for producing the electrolyzer according to claim 35 , wherein, in the arranging process (B1), a wound state of the wound body is released on the membrane.

37 . A method for producing a new electrolyzer by arranging an electrode for electrolysis and a new membrane in an existing electrolyzer comprising an anode, a cathode that is opposed to the anode, a membrane arranged between the anode and the cathode, and an electrolytic cell frame comprising an anode frame that supports an the anode and a cathode frame that supports the cathode, the electrolytic cell frame storing the anode, the cathode, and the membrane by integrating the anode frame and the cathode frame, the method comprising:
a releasing process (A2) of releasing the integration of the anode frame and the cathode frame to expose the membrane, a removing process (B2) of removing the membrane after the releasing process (A2) and arranging the electrode for electrolysis and new membrane on the anode or cathode, and an integrating process (C2) of integrating the anode frame and the cathode frame to store the anode, the cathode, the membrane, the electrode for electrolysis, and the new membrane into the electrolytic cell frame.

38 . The method for producing the electrolyzer according to claim 37 , wherein, in the removing process (B2), the electrode for electrolysis is mounted on the anode or cathode, the new membrane is mounted on the electrode for electrolysis, and the new membrane is flattened.

39 . (canceled)

Assignees

• Asahi Chemical Ind

Inventors

• Wada Yoshifumi
• Tachihara Hiroshi
• Matsuoka Mamoru
• Funakawa Akiyasu
• Kado Yoshifumi
• Morikawa Takuya
• Yamamoto Aguru

Classifications

• B32B38/1808

  characterised by the laying up of the layers · CPC title

• C25B9/23 Primary

  comprising ion-exchange membranes in or on which electrode material is embedded · CPC title

• C25B1/04 Primary

  by electrolysis of water · CPC title

• Y02E60/36

  Hydrogen production from non-carbon containing sources, e.g. by water electrolysis · CPC title

• B32B2255/20

  Inorganic coating · CPC title