Patents Assigned to Permelec Electrode
  • Publication number: 20140322632
    Abstract: The present invention provides an electrode for electrochemistry with a high quality, in which the surface area of the polycrystalline conductive diamond layer is increased and the crystal plane is controlled. In addition, when the catalyst layer of electrode substance is coated on the polycrystalline conductive diamond layer, adherence between the two layers is increased to provide an electrode for electrochemistry with a high durability. The polycrystalline conductive diamond layer is held under an atmosphere of carbon dioxide at a temperature 400 degrees Celsius or higher but 1000 degrees Celsius or lower to make the polycrystalline conductive diamond layer porous and make a specific crystal plane to remain and be formed.
    Type: Application
    Filed: November 1, 2012
    Publication date: October 30, 2014
    Applicant: Permelec Electrode Ltd.
    Inventors: Wataru Sugimoto, Junfeng Zhang
  • Patent number: 8815064
    Abstract: The present invention provides an ozone generator comprising an anode and a cathode provided on each side of a fluororesin type cation exchange membrane, the anode being a conductive diamond electrode having conductive diamond on the surface, wherein water is supplied to an anode compartment, DC current is supplied between the anode and the cathode to electrolyze water to evolve ozone from the anode compartment and hydrogen from a cathode compartment, the conductive diamond electrode comprising a substrate having a plurality of convexo-concave and a conductive diamond film coated on the surface of the substrate is applied as the conductive diamond electrode, and a close packed layer of ion exchange resin particles or the fluororesin type cation exchange membrane with notch is closely adhered to the surface of the anode side of the fluororesin type cation exchange membrane.
    Type: Grant
    Filed: November 26, 2010
    Date of Patent: August 26, 2014
    Assignee: Permelec Electrode Ltd.
    Inventors: Masaaki Kato, Rie Kawaguchi, Takamichi Kishi
  • Patent number: 8617377
    Abstract: An electrowinning method of metals through electrolysis of a metal chloride solution uses an anode comprising a substrate comprising titanium or titanium alloy, and a coating layer comprising a plurality of a unit layer, provided on the surface of the substrate. The unit layer comprises the first coating layer comprising a mixture of iridium oxide, ruthenium oxide and titanium oxide and the second coating layer comprising a mixture of platinum and iridium oxide. The first coating layer contacts with the surface of said substrate and an outer coating layer of the unit layer formed on the outermost layer of said coating layer is the second coating layer. The coating layer is formed by thermal decomposition baking, which followed by post-baking at a higher baking temperature.
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: December 31, 2013
    Assignee: Permelec Electrode Ltd.
    Inventor: Toshikazu Hayashida
  • Patent number: 8394245
    Abstract: An object of the present invention is to provide a production apparatus for electro-deposited metal foil or the like that can reduce thickness fluctuation of electro-deposited metal foil. To achieve the object, a production apparatus for electro-deposited metal foil or the like in which a cathode and an insoluble anode apart from each other, supplying an electrolytic solution through a gap between the cathode and the anode, making the cathode move along to the insoluble anode, electrodepositing a metal component on an electro-deposition surface of the moving cathode is applied.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: March 12, 2013
    Assignee: Permelec Electrode Ltd.
    Inventors: Yusuke Ozaki, Akira Kunimatsu
  • Patent number: 8366889
    Abstract: Subject The present invention aims to provide an anode for electrolysis by an ion exchange membrane process and the manufacturing method thereof which can show a lower concentration of by-product oxygen gas in chlorine gas and a lower overvoltage stably for a long time, compared with conventional anodes.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: February 5, 2013
    Assignee: Permelec Electrode Ltd.
    Inventor: Toshikazu Hayashida
  • Patent number: 8349164
    Abstract: The present invention provides a conductive diamond electrode structure for use in electrolytic synthesis of a fluorine-containing material with a fluoride ion-containing molten salt electrolytic bath, which comprises: a conductive electrode feeder; and a conductive diamond catalyst carrier comprising a conductive substrate and a conductive diamond film carried on a surface thereof, wherein the conductive diamond catalyst carrier is detachably attached to the conductive electrode feeder at a portion to be immersed in the electrolytic bath. Also disclosed is an electrolytic synthesis of a fluorine-containing material using the conductive diamond electrode structure.
    Type: Grant
    Filed: June 20, 2008
    Date of Patent: January 8, 2013
    Assignee: Permelec Electrode Ltd.
    Inventors: Tsuneto Furuta, Setsuro Ogata, Masaharu Uno
  • Patent number: 8337958
    Abstract: A process for manufacturing electrodes for electrolysis, including the steps of forming an arc ion plating undercoating layer comprising valve metal or valve metal alloy including a crystalline tantalum component and a crystalline titanium component on the surface of the electrode substrate comprising valve metal or valve metal alloy, by an arc ion plating method; heat sintering the electrode substrate to transform only the tantalum component of the arc ion plating undercoating layer into an amorphous substance; and forming an electrode catalyst layer on the surface of the arc ion plating undercoating layer including the valve metal or valve metal alloy including the tantalum component transformed to the amorphous substance and the crystalline titanium component.
    Type: Grant
    Filed: March 18, 2009
    Date of Patent: December 25, 2012
    Assignee: Permelec Electrode Ltd.
    Inventors: Yi Cao, Masashi Hosonuma
  • Patent number: 8338323
    Abstract: The present invention provides a process for producing an electrode for electrochemical reaction, wherein a conductive diamond layer is formed on an electrode substrate in the electrode; and the electrode substrate on which the conductive diamond layer is formed is kept at a temperature of 400° C. or more and 1,000° C. or less in a water vapor, thereby forming a micropore in the conductive diamond layer. Also, the present invention provides an electrode for electrochemical reaction obtained by the foregoing production process.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: December 25, 2012
    Assignees: Permelec Electrode Ltd., Shinshu University
    Inventors: Yoshio Takasu, Wataru Sugimoto, Tatsuya Ohashi, Junfeng Zhang
  • Patent number: 8070924
    Abstract: The present invention provides an electrode for generation of hydrogen comprising: a conductive substrate; a catalytic layer formed on the conductive substrate and containing at least one platinum group metal selected from the group consisting of Pt, Ir, Ru, Pd and Rh; and a hydrogen adsorption layer formed on the catalytic layer. The present invention also provides an electrode for generation of hydrogen comprising: a conductive substrate, a catalytic layer formed on the conductive substrate and containing: at least one platinum group metal selected from the group consisting of Pt, Ir, Ru, Pd and Rh and/or at least one oxide of said platinum group metals; and at least one metal selected from the group consisting of lanthanum series metals, valve metals, iron series metals and silver and/or at least one oxide of said metals; and a hydrogen adsorption layer formed on the catalytic layer.
    Type: Grant
    Filed: March 24, 2008
    Date of Patent: December 6, 2011
    Assignee: Permelec Electrode Ltd.
    Inventors: Takeo Ohsaka, Shunsuke Sata, Miwako Nara, Yoshinori Nishiki
  • Patent number: 7964068
    Abstract: The present invention provides: a membrane-electrode assembly having a first electrode having a shape of a rod-form or a cylindrical-form, a strip-form diaphragm covering the periphery of the first electrode, and a second electrode disposed on a surface of the strip-form diaphragm; an electrolytic unit containing the membrane-electrode assembly; an electrolytic water ejecting apparatus containing the electrolytic unit; and a method of sterilization using the membrane-electrode assembly.
    Type: Grant
    Filed: September 20, 2007
    Date of Patent: June 21, 2011
    Assignees: Permelec Electrode Ltd., Institute of National Colleges of Technology, Japan
    Inventors: Noriyuki Kitaori, Kota Sekido, Genzo Yamane, Katsumi Hamaguchi, Hozumi Tanaka, Yoshinori Nishiki, Tsuneto Furuta
  • Patent number: 7959774
    Abstract: The present invention provides a cathode for hydrogen generation comprising a cathode substrate having provided thereon a catalytic layer, wherein the catalytic layer contains at least three components of platinum, cerium and lanthanum in amounts of 50 to 98 mol %, 1 to 49 mol % and 1 to 49 mol %, respectively, in the form of metal, metal oxide or metal hydroxide.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: June 14, 2011
    Assignee: Permelec Electrode Ltd.
    Inventors: Miwako Nara, Tomohisa Suzuki, Masashi Tanaka, Yoshinori Nishiki
  • Patent number: 7914652
    Abstract: The present invention provides an oxygen gas diffusion cathode for sodium chloride electrolysis comprising: a porous conductive substrate comprising silver, a hydrophobic material and a carbon material; a catalyst comprising silver and palladium, coated on the porous conductive substrate.
    Type: Grant
    Filed: November 16, 2007
    Date of Patent: March 29, 2011
    Assignee: Permelec Electrode Ltd.
    Inventors: Yuji Yamada, Yuki Izawa, Yoshinori Nishiki
  • Patent number: 7887679
    Abstract: The present invention provides a method of sterilization with an electrolytic water, including: electrolyzing a raw water with an electrolytic unit including: a cathode; and an anode at least having a part containing a conductive diamond to prepare an electrolytic water; and ejecting the electrolytic water to a substance to be sterilized, and an electrolytic water ejecting apparatus.
    Type: Grant
    Filed: June 15, 2006
    Date of Patent: February 15, 2011
    Assignees: Permelec Electrode Ltd., Institute of National Colleges of Technology, Japan
    Inventors: Noriyuki Kitaori, Masaharu Uno, Yoshinori Nishiki, Tsuneto Furuta
  • Patent number: 7857953
    Abstract: The present invention provides an oxygen-reduction gas diffusion cathode having: a porous conductive substrate; diamond particle having a hydrophobic surface; and catalyst particle, the diamond particle and the catalyst particle being disposed on the porous conductive substrate, and a method of sodium chloride electrolysis using the cathode.
    Type: Grant
    Filed: October 25, 2006
    Date of Patent: December 28, 2010
    Assignee: Permelec Electrode Ltd.
    Inventors: Yuji Yamada, Yuki Izawa, Masaharu Uno, Yoshinori Nishiki, Tsuneto Furuta
  • Patent number: 7858551
    Abstract: The present invention provides an electrode catalyst for electrochemical reaction, the electrode catalyst having: a conductive diamond particle having fine pores on a surface thereof; and a carbon-reactive catalyst metal in the fine pores, a process for producing the electrode catalyst, and an electrode.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: December 28, 2010
    Assignees: Permelec Electrode Ltd., Shinshu University
    Inventors: Yoshio Takasu, Yasushi Murakami, Wataru Sugimoto, Yuji Yamada, Masaharu Uno, Yoshinori Nishiki, Tsuneto Furuta
  • Patent number: 7842353
    Abstract: A process for manufacturing electrodes for electrolysis, including steps of forming an arc ion plating (AIP) undercoating layer including valve metal or valve metal alloy containing a crystalline tantalum component and a crystalline titanium component on a surface of the electrode substrate comprising valve metal or valve metal alloy, by an arc ion plating method; heat sintering, including the steps of coating a metal compound solution, which includes valve metal as a chief element, onto the surface of the AIP undercoating layer, followed by heat sintering to transform only the tantalum component of the AIP undercoating layer into an amorphous substance, and to form an oxide interlayer, which includes a valve metal oxides component as a chief element, on the surface of the AIP undercoating layer containing the transformed amorphous tantalum component and the crystalline titanium component; and forming an electrode catalyst layer on the surface of the oxide interlayer.
    Type: Grant
    Filed: March 18, 2009
    Date of Patent: November 30, 2010
    Assignee: Permelec Electrode Ltd.
    Inventors: Yi Cao, Hajime Wada, Masashi Hosonuma
  • Patent number: 7708867
    Abstract: The present invention provides a gas diffusion electrode having: an electrode substrate; and a catalyst layer containing a hydrophilic catalyst and a hydrophobic binder, which is carried on the electrode substrate, wherein the electrode substrate contains at least one carbon material selected from a carbon cloth, a carbon paper, a foamed carbon material, and a sintered carbon material.
    Type: Grant
    Filed: February 8, 2006
    Date of Patent: May 4, 2010
    Assignee: Permelec Electrode Ltd.
    Inventors: Yuji Yamada, Takeshi Kasuga, Yoshinori Nishiki, Tsuneto Furuta
  • Publication number: 20090246410
    Abstract: A process for manufacturing electrodes for electrolysis, including the steps of forming an arc ion plating undercoating layer comprising valve metal or valve metal alloy including a crystalline tantalum component and a crystalline titanium component on the surface of the electrode substrate comprising valve metal or valve metal alloy, by an arc ion plating method; heat sintering the electrode substrate to transform only the tantalum component of the arc ion plating undercoating layer into an amorphous substance; and forming an electrode catalyst layer on the surface of the arc ion plating undercoating layer including the valve metal or valve metal alloy including the tantalum component transformed to the amorphous substance and the crystalline titanium component.
    Type: Application
    Filed: March 18, 2009
    Publication date: October 1, 2009
    Applicant: Permelec Electrode Ltd.
    Inventors: Yi Cao, Masashi Hosonuma
  • Publication number: 20090242417
    Abstract: A process for manufacturing electrodes for electrolysis, including steps of forming an arc ion plating (AIP) undercoating layer including valve metal or valve metal alloy containing a crystalline tantalum component and a crystalline titanium component on a surface of the electrode substrate comprising valve metal or valve metal alloy, by an arc ion plating method; heat sintering, including the steps of coating a metal compound solution, which includes valve metal as a chief element, onto the surface of the AIP undercoating layer, followed by heat sintering to transform only the tantalum component of the AIP undercoating layer into an amorphous substance, and to form an oxide interlayer, which includes a valve metal oxides component as a chief element, on the surface of the AIP undercoating layer containing the transformed amorphous tantalum component and the crystalline titanium component; and forming an electrode catalyst layer on the surface of the oxide interlayer.
    Type: Application
    Filed: March 18, 2009
    Publication date: October 1, 2009
    Applicant: Permelec Electrode Ltd.
    Inventors: Yi Cao, Hajime Wada, Masashi Hosonuma
  • Patent number: 7468121
    Abstract: The present invention provides a conductive diamond electrode having: a conductive substrate; a coating layer formed on a surface of the conductive substrate, the coating layer containing one of a metal and an alloy each including at least one of niobium and tantalum; and a conductive diamond layer formed on a surface of the coating layer, and a process for producing the conductive diamond electrode.
    Type: Grant
    Filed: August 1, 2006
    Date of Patent: December 23, 2008
    Assignee: Permelec Electrode Ltd.
    Inventors: Masashi Hosonuma, Masaharu Uno, Tomoyasu Shibata, Yoshinori Nishiki, Tsuneto Furuta