(19)
(11) EP 1 970 471 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
13.05.2009 Bulletin 2009/20

(43) Date of publication A2:
17.09.2008 Bulletin 2008/38

(21) Application number: 08003969.6

(22) Date of filing: 04.03.2008
(51) International Patent Classification (IPC): 
C25B 11/04(2006.01)
 C25B 1/13(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated Extension States:
AL BA MK RS

(30) Priority: 07.03.2007 JP 2007057294
01.02.2008 JP 2008022524

(71) Applicant: Sanyo Electric Co., Ltd.
Moriguchi-shi, Osaka (JP)

(72) Inventors:
  • Kitsuka, Kenta
    Gunma, 370-0815 (JP)
  • Kaneda, Kazuhiro
    Saitama 366-0824 (JP)
  • Ikematsu, Mineo
    Ibaraki, 300-0013 (JP)
  • Kawata, Katsura
    Saitama, 360-0041 (JP)

(74) Representative: Glawe, Delfs, Moll 
Patentanwälte Postfach 26 01 62
80058 München
80058 München (DE)

   


(54) Electrode for electrolysis and electrolysis unit


(57) There are disclosed an electrode for electrolysis capable of efficiently forming ozone by electrolysis of an electrolytic solution (e.g., water) at ordinary temperature with a low current density, and an electrolysis unit using the electrode. The electrode for electrolysis includes a substrate and a surface layer formed on the surface of the substrate, and the surface layer is made of an amorphous insulator, for example, a thin film of amorphous tantalum oxide, amorphous tungsten oxide or amorphous aluminum oxide.







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