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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12577691 B1

PDFFull Text
Date of Patent:
Mar. 17, 2026

Filed:

Feb. 01, 2023

Water electrolysis cell and water electrolysis stack

Applicant:

Toyota Jidosha Kabushiki Kaisha, Toyota, JP;

Inventors:

Joji Yoshimura, Toyota, JP;

Tomoyuki Kayama, Nagakute, JP;

Tsuyoshi Hamaguchi, Nagakute, JP;

Ryuichi Iwata, Nagakute, JP;

Takahiro Ikeda, Nagakute, JP;

Assignee:

TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;

Attorney:

Hunton Andrews Kurth LLP

Primary Examiner:

Louis J Rufo

Int. Cl.
CPC ...
C25B 9/23 (2021.01); C25B 1/04 (2021.01); C25B 9/77 (2021.01); C25B 11/032 (2021.01); C25B 13/02 (2006.01);
U.S. Cl.
CPC ...
C25B 9/23 (2021.01); C25B 1/04 (2013.01); C25B 9/77 (2021.01); C25B 11/032 (2021.01); C25B 13/02 (2013.01);
Abstract

A water electrolysis cell includes an anode disposed on one side across a solid polymer electrolyte membrane and a cathode disposed on the other side. The anode is configured of an anode catalyst layer, an anode gas diffusion layer, and an anode separator, laminated in that order from a side of the solid polymer electrolyte membrane. The cathode is configured of a cathode catalyst layer, a cathode gas diffusion layer, and a cathode separator, laminated in that order from the side of the solid polymer electrolyte membrane. A first channel is provided in the anode separator, and a wall face of the first channel in the anode separator is imparted with water repellency. A second channel is provided in the cathode separator, and a wall face of the second channel in the cathode separator is imparted with hydrophilicity.

Find Patent Forward Citations

Yoshimura, Joji. (2026). Water electrolysis cell and water electrolysis stack (U.S. Patent No. 12577691). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12577691

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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