公开(公告)号：US10658676B2

公开(公告)日：2020-05-19

申请号：US16471397

申请日：2017-12-22

Applicant: SHOWA DENKO K.K. ,  NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY

Inventor： Kunchan Lee ,  Yoshinori Yamato ,  Kenichiro Ota ,  Akimitsu Ishihara

IPC: H01M4/00 ,  H01M4/90 ,  B01J27/24 ,  H01M4/36 ,  H01M4/48 ,  H01M8/10

Abstract: An object of the invention is to provide an oxygen reduction catalyst composed of a titanium oxynitride having high oxygen reduction capacity. The oxygen reduction catalyst of the invention is a titanium oxynitride that has a nitrogen element content of 8.0 to 15 mass %, has a crystal structure of anatase titanium dioxide in a powder X-ray diffraction measurement, and has a signal intensity ratio N—Ti—N/O—Ti—N in an X-ray photoelectron spectroscopic analysis of in the range of 0.35 to 0.70.

公开(公告)号：US10005066B2

公开(公告)日：2018-06-26

申请号：US15531175

申请日：2015-11-24

Applicant: SHOWA DENKO K.K.

Inventor： Kunchan Lee ,  Hiroshi Takahashi ,  Tomoya Kitagawa

IPC: B01J23/06 ,  B01J23/16 ,  B01J23/26 ,  B01J23/40 ,  B01J23/52 ,  B01J21/18 ,  B01J35/10 ,  B01J37/08 ,  B01J23/89 ,  H01M4/92 ,  H01M4/96 ,  H01M8/10

CPC classification number: B01J21/18 ,  B01J21/04 ,  B01J23/89 ,  B01J23/8913 ,  B01J35/0013 ,  B01J35/0033 ,  B01J35/008 ,  B01J35/10 ,  B01J37/08 ,  B01J37/084 ,  H01M4/9083 ,  H01M4/92 ,  H01M4/926 ,  H01M4/96 ,  H01M8/10

Abstract: A catalyst carrier, an electrode catalyst, an electrode including the catalyst, a membrane electrode assembly including the electrode, and a fuel cell including the membrane electrode assembly. The catalyst carrier includes a carbon material having a chain structure including a chain of carbon particles, and an oxide-carbon composite particle in which a carbon particle encloses a particle of an oxide of a group IV element on the periodic table, the oxide-carbon composite particle being contained in the carbon material. The catalyst carrier has a BET specific surface area of 450 to 1100 m2/g.

公开(公告)号：US10573902B2

公开(公告)日：2020-02-25

申请号：US16471623

申请日：2017-12-27

Applicant: SHOWA DENKO K.K.

Inventor： Suguru Sakaguchi ,  Yoshishige Okuno ,  Takuya Imai ,  Kunchan Lee

IPC: B01J27/04 ,  B01J27/045 ,  B01J27/047 ,  B01J27/051 ,  H01M4/92 ,  H01M8/10 ,  B01J27/043

Abstract: The present invention relates to an oxygen reduction catalyst, an electrode, a membrane electrode assembly, and a fuel cell, and the oxygen reduction catalyst is an oxygen reduction catalyst containing substituted CoS2, in which the substituted CoS2 has a cubic crystal structure, the oxygen reduction catalyst contains the substituted CoS2 within 0.83 nm from the surface thereof, and the substituted CoS2 has at least one substitutional atom selected from the group consisting of Cr, Mo, Mn, Tc, Re, Rh, Cu, and Ag in some of Co atom sites.

公开(公告)号：US09947937B2

公开(公告)日：2018-04-17

申请号：US15538050

申请日：2015-12-25

Applicant: SHOWA DENKO K.K.

Inventor： Kunchan Lee ,  Hiroshi Takahashi ,  Tomoya Kitagawa

IPC: H01M4/90 ,  H01M8/1004 ,  H01M4/88 ,  H01M4/92

CPC classification number: H01M4/9083 ,  B01J21/04 ,  B01J21/18 ,  B01J23/8913 ,  B01J35/0013 ,  B01J35/008 ,  B01J37/084 ,  H01M4/8817 ,  H01M4/8828 ,  H01M4/9041 ,  H01M4/926 ,  H01M8/1004 ,  H01M2250/10 ,  H01M2250/20 ,  Y02B90/14 ,  Y02P70/56 ,  Y02T90/32

Abstract: A catalyst carrier, an electrode catalyst, an electrode including the catalyst, a membrane electrode assembly including the electrode, and a fuel cell including the membrane electrode assembly. The catalyst carrier includes a carbon material having a chain structure including a chain of carbon particles and an alumina-carbon composite particle in which a carbon particle encloses an alumina particle, the alumina-carbon composite particle is contained in the carbon material, and the catalyst carrier has a BET specific surface area of 450 to 1100 m2/g.

公开(公告)号：US20150044595A1

公开(公告)日：2015-02-12

申请号：US14385574

申请日：2013-03-19

Applicant: SHOWA DENKO K.K.

Inventor： Ryuji Monden ,  Takuya Imai ,  Yuji Ito ,  Kunchan Lee ,  Takashi Sato

IPC: H01M4/90 ,  H01M4/86 ,  H01M8/10

CPC classification number: H01M4/9016 ,  H01M4/8605 ,  H01M4/9041 ,  H01M8/1004 ,  H01M8/1018 ,  H01M2008/1095

Abstract: An object of the present invention is to suppress flooding phenomenon in an electrode catalyst for fuel cells containing a metal atom, a carbon atom, a nitrogen atom and an oxygen atom. A production process of an electrode catalyst for fuel cells is provided which includes a fluorination step of bringing a catalyst body into contact with fluorine, the catalyst body having an atom of at least one metal element selected from the group consisting of zinc, titanium, niobium, zirconium, aluminum, chromium, manganese, iron, cobalt, nickel, copper, strontium, yttrium, tin, tungsten, cerium, samarium and lanthanum, a carbon atom, a nitrogen atom and an oxygen atom.

Abstract translation: 本发明的目的是为了抑制含有金属原子，碳原子，氮原子和氧原子的燃料电池的电极催化剂中的溢流现象。 提供了一种用于燃料电池的电极催化剂的生产方法，其包括使催化剂体与氟接触的氟化步骤，所述催化剂体具有选自锌，钛，铌中的至少一种金属元素的原子 锆，铝，铬，锰，铁，钴，镍，铜，锶，钇，锡，钨，铈，钐和镧，碳原子，氮原子和氧原子。

公开(公告)号：US10096841B2

公开(公告)日：2018-10-09

申请号：US15537907

申请日：2015-12-24

Applicant: SHOWA DENKO K.K.

Inventor： Kunchan Lee ,  Hiroshi Takahashi ,  Tomoya Kitagawa

IPC: H01M4/96 ,  H01M4/90 ,  B01J21/18 ,  H01M4/88 ,  H01M4/92 ,  B01J35/10 ,  B01J37/04 ,  B01J37/08

Abstract: A catalyst carrier, an electrode catalyst, an electrode including the catalyst, a membrane electrode assembly including the electrode, a fuel cell including the membrane electrode assembly, and a method for producing the catalyst carrier. The catalyst carrier includes a carbon material having a chain structure including a chain of carbon particles. The catalyst carrier contains a titanium compound-carbon composite particle in which carbon encloses a titanium compound particle. The molar ratios of a carbon element, a nitrogen element, and an oxygen element to a titanium element taken as 1 in the catalyst carrier are more than 0 and 50 or less, more than 0 and 2 or less, and more than 0 and 3 or less, respectively.

公开(公告)号：US09947940B2

公开(公告)日：2018-04-17

申请号：US15103383

申请日：2014-08-26

Applicant: SHOWA DENKO K.K.

Inventor： Kunning Zhu ,  Kunchan Lee

IPC: B01J23/00 ,  H01M4/92 ,  H01M4/88

CPC classification number: H01M4/921 ,  H01M4/88 ,  H01M4/925 ,  H01M4/926 ,  H01M4/928

Abstract: A method is provided for producing a platinum alloy-containing fuel cell electrode catalyst with high activity which is suited for its industrial mass-production. The method for producing a fuel cell electrode catalyst includes a step of preparing a dispersion in which particles of a fuel cell electrode catalyst precursor including a platinum alloy is dispersed in an electrolyte solution, and a step of alternately subjecting the dispersion to bubbling with an oxidizing gas and to bubbling with an inert gas or a reducing gas.

公开(公告)号：US09640801B2

公开(公告)日：2017-05-02

申请号：US15064510

申请日：2016-03-08

Applicant: SHOWA DENKO K.K.

Inventor： Masaki Horikita ,  Kunchan Lee ,  Ryuji Monden ,  Chunfu Yu ,  Yasuaki Wakizaka ,  Takashi Sato ,  Yoshinori Abe

IPC: H01M4/88 ,  H01M4/90 ,  H01M4/92 ,  H01M8/1011

CPC classification number: H01M4/8817 ,  H01M4/8803 ,  H01M4/8882 ,  H01M4/8885 ,  H01M4/9008 ,  H01M4/9041 ,  H01M4/9075 ,  H01M4/921 ,  H01M4/925 ,  H01M8/1011 ,  Y02E60/50 ,  Y02E60/523 ,  Y02P70/56

Abstract: A catalyst carrier production process includes a step (a) of mixing a transition metal compound (1), a nitrogen-containing organic compound (2), and a solvent to provide a catalyst carrier precursor solution; a step (b) of removing the solvent from the catalyst carrier precursor solution; and a step (c) of thermally treating a solid residue obtained in the step (b) at a temperature of 500 to 1100° C. to provide a catalyst carrier; wherein the transition metal compound (1) is partly or wholly a compound including a transition metal element (M1) selected from the group 4 and 5 elements of the periodic table as a transition metal element; and at least one of the transition metal compound (1) and the nitrogen-containing organic compound (2) includes an oxygen atom.

公开(公告)号：US09318749B2

公开(公告)日：2016-04-19

申请号：US13946531

申请日：2013-07-19

Applicant: SHOWA DENKO K.K.

Inventor： Masaki Horikita ,  Kunchan Lee ,  Ryuji Monden ,  Chunfu Yu ,  Yasuaki Wakizaka ,  Takashi Sato ,  Yoshinori Abe

IPC: H01M4/90 ,  H01M4/92 ,  H01M4/88 ,  H01M8/10

CPC classification number: H01M4/8817 ,  H01M4/8803 ,  H01M4/8882 ,  H01M4/8885 ,  H01M4/9008 ,  H01M4/9041 ,  H01M4/9075 ,  H01M4/921 ,  H01M4/925 ,  H01M8/1011 ,  Y02E60/50 ,  Y02E60/523 ,  Y02P70/56

Abstract: A catalyst carrier production process includes a step (a) of mixing a transition metal compound (1), a nitrogen-containing organic compound (2), and a solvent to provide a catalyst carrier precursor solution; a step (b) of removing the solvent from the catalyst carrier precursor solution; and a step (c) of the thermally treating a solid residue obtained in the step (b) at a temperature of 500 to 1100° C. to provide a catalyst carrier; wherein the transition metal compound (1) is partly or wholly a compound including a transition metal element (M1) selected from the group 4 and 5 elements of the periodic table as a transition metal element; and at least one of the transition metal compound (1) and the nitrogen-containing organic compound (2) includes an oxygen atom.

Abstract translation: 催化剂载体的制造方法包括将过渡金属化合物（1），含氮有机化合物（2）和溶剂混合的步骤（a），以提供催化剂载体前体溶液; 从催化剂载体前体溶液中除去溶剂的步骤（b）; 和步骤（c），在500〜1100℃的温度下热处理步骤（b）中得到的固体残渣，得到催化剂载体; 其中过渡金属化合物（1）部分或全部是包含选自元素周期表第4族和第5族元素的过渡金属元素（M1）作为过渡金属元素的化合物; 并且过渡金属化合物（1）和含氮有机化合物（2）中的至少一种包含氧原子。

公开(公告)号：US10727514B2

公开(公告)日：2020-07-28

申请号：US16495637

申请日：2018-03-22

Applicant: SHOWA DENKO K.K.

Inventor： Takuya Imai ,  Kazuo Furuya ,  Kunchan Lee

IPC: H01M4/92 ,  H01M8/1004 ,  B01J27/043 ,  H01M4/90 ,  H01M8/1018

Abstract: Provided are an oxygen reduction catalyst having a high electrode potential under a fuel cell operating environment, an electrode containing the oxygen reduction catalyst, a membrane electrode assembly in which a cathode is the electrode, and a fuel cell including the membrane electrode assembly. The oxygen reduction catalyst used here contains cobalt, sulfur, and oxygen as elements, has a CoS2 cubic structure in powder X-ray diffractometry, and having an S—Co/S—O peak area ratio of 6 to 15 in an S2p spectrum in X-ray photoelectron spectroscopic analysis.