(19)
(11) EP 4 527 984 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
30.04.2025 Bulletin 2025/18

(43) Date of publication A2:
26.03.2025 Bulletin 2025/13

(21) Application number: 24161998.0

(22) Date of filing: 07.03.2024
(51) International Patent Classification (IPC): 
C25B 1/04(2021.01)
C25B 9/77(2021.01)
C25B 1/23(2021.01)
C25B 1/27(2021.01)
 C25B 9/73(2021.01)
C25B 15/08(2006.01)
C25B 3/26(2021.01)
C25B 3/25(2021.01)
(52) Cooperative Patent Classification (CPC):
C25B 9/73; C25B 9/77; C25B 15/08; C25B 1/23; C25B 3/26; C25B 1/27; C25B 3/25
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA
Designated Validation States:
GE KH MA MD TN

(30) Priority: 19.09.2023 JP 2023151655

(71) Applicant: Kabushiki Kaisha Toshiba
Tokyo 105-0023 (JP)

(72) Inventors:
  • YAMAGIWA, Masakazu
    Tokyo, 105-0023 (JP)
  • KUDO, Yuki
    Tokyo, 105-0023 (JP)
  • KIYOTA, Yasuhiro
    Tokyo, 105-0023 (JP)
  • ONO, Akihiko
    Tokyo, 105-0023 (JP)
  • YONETSU, Maki
    Tokyo, 105-0023 (JP)
  • KITAGAWA, Ryota
    Tokyo, 105-0023 (JP)
  • MIKOSHIBA, Satoshi
    Tokyo, 105-0023 (JP)

(74) Representative: Hoffmann Eitle 
Patent- und Rechtsanwälte PartmbB Arabellastraße 30
81925 München
81925 München (DE)

   


(54) ELECTROLYSIS DEVICE, ELECTROLYSIS SYSTEM, AND METHOD OF OPERATING ELECTROLYSIS DEVICE


(57) An electrolysis device includes: a first electrolysis cell to reduce a reducible material and oxidize an oxidizable material; a second electrolysis cell to reduce the reducible material and oxidize the oxidizable material; a first supply source to supply a first fluid containing gas of the reducible material to the cells; a second supply source to supply a second fluid containing liquid of the oxidizable material to the cells; and at least one power supply to supply a first and a second power supply current to the first and the second electrolysis cell respectively. The at least one power supply can set values of the first and second power supply currents so that a current density of current flowing through the second electrolysis cell when reducing the reducible material is higher than a current density of current flowing through the first electrolysis cell when reducing the reducible material.







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