Electrode structure, method for producing electrode structure, electrolytic cell, and electrolyzer

Patent metadata

Field	Value
Publication number	US-11967695-B2
Application number	US-201917257688-A
Country	US
Kind code	B2
Filing date	Jul 5, 2019
Priority date	Jul 6, 2018
Publication date	Apr 23, 2024
Grant date	Apr 23, 2024

Abstract

An electrode structure including:
an electrode; a current collector facing the electrode; an elastic body located between the electrode and the current collector, the elastic body having conductivity; and an electrode fixing member located between the elastic body and the current collector, wherein at least a part of a peripheral edge of the electrode being fixed between the electrode fixing member and the current collector.

First claim

The invention claimed is:

1. An electrode structure comprising:
an electrode;
a current collector facing the electrode;
an elastic body located between the electrode and the current collector, the elastic body having conductivity; and
an electrode fixing member located between the elastic body and the current collector,
wherein at least a part of a peripheral edge of the electrode is fixed between the electrode fixing member and the current collector.

2. The electrode structure according to claim 1 , wherein an entire peripheral edge of the electrode is fixed between the electrode fixing member and the current collector.

3. The electrode structure according to claim 1 , wherein a partial length of the electrode located between the electrode fixing member and the current collector is 5 mm or more and 30 mm or less.

4. An electrolytic cell comprising:
a cathode chamber;
a partition wall facing the cathode chamber; and
an anode chamber facing the partition wall, the anode chamber being located on an opposite side of the cathode chamber,
wherein at least one of the cathode chamber and the anode chamber comprises the electrode structure according to claim 1 .

5. An electrolyzer comprising:
the electrolytic cell according to claim 4 ; and
an ion exchange membrane facing the electrolytic cell.

6. A method for producing an electrode structure, comprising:
a removal process of removing a first electrode from a structure comprising the first electrode, a current collector facing the first electrode, and a first elastic body located between the first electrode and the current collector, the first elastic body having conductivity;
a placement process of placing a second electrode on the current collector;
providing an electrode fixing member at a location between the first elastic body and the current collector; and
a bending process of bending at least a part of a peripheral edge of the second electrode over the current collector to form a bent section, followed by fixing at least a part of the bent section between the electrode fixing member and the current collector such that the second electrode is fixed to the current collector.

7. The method for producing the electrode structure according to claim 6 , wherein the first elastic body is further removed in the removal process, and
in the placement process a second elastic body is placed on the current collector, followed by placing the second electrode on the current collector.

8. A method for producing an electrode structure, comprising:
a removal process of removing a first electrode from a structure comprising the first electrode, a current collector having a first face facing the first electrode and a second face on an opposite side of the first face, and an elastic body located between the first electrode and the first face of the current collector, the first elastic body having conductivity;
a cutting process of cutting at least a part of a peripheral edge of the current collector to thereby form a cut-out inside the structure; and
a bending process of placing a second electrode on the elastic body, followed by bending the second electrode so that at least a part of a peripheral edge of the second electrode is located over the second face via the cut-out.

9. The method for producing the electrode structure according to claim 8 , wherein the elastic body is bent so that at least a part of a peripheral edge of the elastic body is located over the second face via the cut-out in the bending process.

10. The method for producing the electrode structure according to claim 8 , wherein the structure further comprises a flange that adheres to the first electrode via an adhesive member, and
the adhesive member is removed to thereby separate the first electrode from the flange in the removal process.

11. The method for producing the electrode structure according to claim 6 , further comprising:
fixing the electrode fixing member to a surface of the current collector such that a gap is defined between the surface of the current collector and an opposing surface of the electrode fixing member; and
the fixing the at least the part of the bent section between the electrode fixing member and the current collector includes fixedly positioning the at least the part of the bent section within the gap.

Assignees

• Asahi Chemical Ind

Inventors

• Kai Naoyuki
• Iiyama Sohei
• Funakawa Akiyasu
• Kado Yoshifumi

Classifications

• C25B9/05

  Pressure cells · CPC title

• C25B9/23

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

• C25B11/02 Primary

  characterised by shape or form · CPC title

• H01M4/0404 Primary

  by coating on electrode collectors · CPC title

• C25B9/63 Primary

  Holders for electrodes; Positioning of the electrodes · CPC title