(19)
(11) EP 4 455 371 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
07.05.2025 Bulletin 2025/19

(43) Date of publication A2:
30.10.2024 Bulletin 2024/44

(21) Application number: 24163202.5

(22) Date of filing: 13.03.2024
(51) International Patent Classification (IPC): 
C25B 13/08(2006.01)
C25B 1/04(2021.01)
C25B 3/03(2021.01)
C25B 9/23(2021.01)
C25B 11/032(2021.01)
C25B 11/065(2021.01)
 C25B 13/05(2021.01)
C25B 1/23(2021.01)
C25B 3/26(2021.01)
C25B 11/031(2021.01)
C25B 11/063(2021.01)
C25B 11/091(2021.01)
(52) Cooperative Patent Classification (CPC):
C25B 13/08; C25B 13/05; C25B 11/063; C25B 11/065; C25B 11/031; C25B 11/091; C25B 11/032; C25B 9/23; C25B 1/23; C25B 1/04; C25B 3/03; C25B 3/26
(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: 26.04.2023 JP 2023072196
06.02.2024 JP 2024016578

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

(72) Inventors:
  • YONETSU, Maki
    Tokyo, 105-0023 (JP)
  • KIYOTA, Yasuhiro
    Tokyo, 105-0023 (JP)
  • KOFUJI, Yusuke
    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 CELL AND ELECTROLYSIS DEVICE


(57) An electrolysis cell 20 includes: a cathode 31 to reduce a reducible gas; an anode 41 to oxidize an oxidizable substance in an electrolytic solution, the cathode 41 containing titanium; and a separator 50 separating the cathode 31 from the anode 41. The separator 50 includes a porous membrane. The porous membrane gives a pore size distribution defined by a graph having a horizontal axis and a vertical axis, the horizontal axis representing pore sizes of through holes of the porous membrane, the pore sizes being determined by using a porometer, the vertical axis representing a pore size flow distribution of pore volumes corresponding to the pore sizes, and the pore size distribution having a peak top in a range of not less than 0.01 µm nor more than 0.3 µm. The porous membrane has an ISO air permeance of not less than 0.8 µm/Pa·s nor more than 150 µm/Pa·s.







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