公开(公告)号：US11692276B2

公开(公告)日：2023-07-04

申请号：US17905232

申请日：2021-03-08

申请人： DE NORA PERMELEC LTD ,  KAWASAKI JUKOGYO KABUSHIKI KAISHA ,  NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY

发明人： Shigenori Mitsushima ,  Yoshiyuki Kuroda ,  Shohei Takatsu ,  Ikuo Nagashima ,  Tatsuya Taniguchi ,  Akihiko Inomata ,  Ayaka Nagai ,  Yoshinori Nishiki ,  Akihiro Kato ,  Awaludin Zaenal ,  Takaaki Nakai

IPC分类号： C25B11/052 ,  C25B1/04 ,  C25B15/029 ,  C25B11/077 ,  C25B15/08 ,  C25B11/061 ,  C25B11/085

CPC分类号： C25B11/052 ,  C25B1/04 ,  C25B11/061 ,  C25B11/077 ,  C25B11/085 ,  C25B15/029 ,  C25B15/08

摘要： The present invention realizes industrially excellent effects such that when electric power having a large output fluctuation, such as renewable energy, is used as a power source, electrolysis performance is unlikely to be deteriorated and excellent catalytic activity is retained stably over a longer period of time, and in addition, the present invention provides a technique that enables forming a catalyst layer of an oxygen generation anode, which gives such excellent effects, with a more versatile materials and by a simple electrolysis method. Provided are an alkaline water electrolysis method including supplying an electrolyte obtained by dispersing a catalyst containing a hybrid nickel-iron hydroxide nanosheet (NiFe-ns) being a composite of a metal hydroxide and an organic substance to an anode chamber and a cathode chamber, and using the electrolyte for electrolysis in each chamber in common, an alkaline water electrolysis method including supplying an electrolyte obtained by dispersing a catalyst containing the NiFe-ns to an anode chamber and a cathode chamber, and performing electrolytic deposition of the NiFe-ns in the electrolytic cell during operation to electrolytically deposit the NiFe-ns on a surface of an electrically conductive substrate having a catalyst layer formed on a surface of an oxygen generation anode, thereby recovering and improving electrolysis performance, and an alkaline water electrolysis anode.

公开(公告)号：US10676832B2

公开(公告)日：2020-06-09

申请号：US16331049

申请日：2017-09-11

申请人： DE NORA PERMELEC LTD ,  NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY ,  KAWASAKI JUKOGYO KABUSHIKI KAISHA

发明人： Shigenori Mitsushima ,  Sho Fujita ,  Ikuo Nagashima ,  Yoshinori Nishiki ,  Akiyoshi Manabe ,  Akihiro Kato

IPC分类号： C25B11/04 ,  C25B1/06 ,  C25B9/00 ,  C25B11/03

摘要： Provided is a method capable of producing, in a simple and low-cost manner, an electrolysis electrode which can be used in alkaline water electrolysis and has superior durability against output variation. The method for producing an anode for alkaline water electrolysis includes: a step of dissolving lithium nitrate and a nickel carboxylate in water to prepare an aqueous solution containing lithium ions and nickel ions, a step of applying the aqueous solution to the surface of a conductive substrate having at least the surface composed of nickel or a nickel-based alloy, and a step of subjecting the conductive substrate to which the aqueous solution has been applied to a heat treatment at a temperature within a range from at least 450° C. to not more than 600° C., thereby forming a catalyst layer composed of a lithium-containing nickel oxide on the conductive substrate.

公开(公告)号：US11866834B2

公开(公告)日：2024-01-09

申请号：US16975868

申请日：2019-03-04

申请人： DE NORA PERMELEC LTD ,  KAWASAKI JUKOGYO KABUSHIKI KAISHA

发明人： Shigenori Mitsushima ,  Yoshiyuki Kuroda ,  Ikuo Nagashima ,  Tatsuya Taniguchi ,  Yoshinori Nishiki ,  Akihiro Kato ,  Awaludin Zaenal ,  Fumiya Tsujii ,  Takaaki Nakai

IPC分类号： C25B11/077 ,  C23C18/12

CPC分类号： C25B11/0771 ,  C23C18/1216 ,  C25B11/0773

摘要： The present invention provides an electrode for electrolysis in which electrolysis performance is hard to deteriorate and excellent catalytic activity is kept stable over a long period of time even when electric power in which there is a large fluctuation in output, such as renewable energy, is used as a power source. The electrode for electrolysis is an electrode 10 for electrolysis provided with an electrically conductive substrate 2 at least the surface of which contains nickel or a nickel-based alloy, an intermediate layer 4 formed on the surface of the electrically conductive substrate 2 and containing a lithium-containing nickel oxide represented by composition formula LixNi2-xO2 (0.02≤x≤0.5), and a catalyst layer 6 of a nickel cobalt spinel oxide, an iridium oxide, or the like, the catalyst layer 6 formed on the surface of the intermediate layer 4.

公开(公告)号：US11060198B2

公开(公告)日：2021-07-13

申请号：US16345290

申请日：2018-02-15

申请人： KAWASAKI JUKOGYO KABUSHIKI KAISHA

发明人： Tatsuya Taniguchi ,  Ayaka Oishi ,  Ikuo Nagashima

IPC分类号： C25B15/08 ,  C25B15/02 ,  C25B9/00 ,  C25B1/04 ,  C25B9/19 ,  C25B9/73

摘要： A water electrolysis system includes: a water electrolysis tank; a cathode side gas passage through which a cathode side gas flows; a monitoring device configured to monitor at least one of a hydrogen concentration of the cathode side gas in the cathode side gas passage, an oxygen concentration of the cathode side gas in the cathode side gas passage, and an amount of electric power supplied to the water electrolysis tank; a hydrogen supply passage through which a hydrogen gas is supplied to the cathode side gas in the cathode side gas passage to increase the hydrogen concentration of the cathode side gas; and a flow regulating valve configured to regulate a flow rate of the hydrogen gas supplied through the hydrogen supply passage to the cathode side gas.