公开(公告)号：US20150155569A1

公开(公告)日：2015-06-04

申请号：US14413441

申请日：2013-04-02

Applicant: SHOWA DENKO K.K.

Inventor： Noriyasu Tezuka ,  Masaki Horikita ,  Takuya Imai ,  Masayuki Yoshimura ,  Yuji Ito ,  Takashi Sato

IPC: H01M4/90

CPC classification number: H01M4/9016 ,  H01M4/8652 ,  H01M4/8663 ,  H01M4/8673 ,  H01M4/90 ,  H01M4/9041 ,  H01M4/9083 ,  H01M4/921 ,  H01M4/925 ,  H01M8/04126 ,  H01M8/04835 ,  H01M2004/8684 ,  H01M2004/8689 ,  H01M2008/1095 ,  H01M2300/0082

Abstract: Provided is a method for operating a fuel cell involving supplying an electrode with a low or non-humidified gas that achieves no significant decrease of voltage as compared with when a high-humidified feed gas is used. The method for operating a fuel cell having a membrane electrode assembly includes a cathode, an anode and an electrolyte membrane interposed between both the electrodes, wherein the cathode has a layer including an oxygen reducing catalyst including composite particles which include atoms of a metal element M1, carbon, nitrogen and oxygen and in which primary particles of a compound of the metal element M1 are dispersed in a carbon structure, which method includes supplying the cathode with an oxidizing agent gas which includes an oxygen gas and which has a relative humidity at a temperature of the membrane electrode assembly of 60% or less, and supplying the anode with a fuel gas.

Abstract translation: 提供了一种用于操作燃料电池的方法，该燃料电池涉及向使用低湿或非加湿气体的电极提供电压，与使用高湿化进料气体相比，不能显着降低电压。 用于操作具有膜电极组件的燃料电池的方法包括阴极，阳极和插入在两个电极之间的电解质膜，其中阴极具有包括氧还原催化剂的层，所述氧还原催化剂包括包含金属元素M1的原子的复合颗粒 碳，氮和氧，其中金属元素M1的化合物的一次粒子分散在碳结构中，该方法包括向阴极供给包含氧气的氧化剂气体，并且其相对湿度为 膜电极组件的温度为60％以下，向阳极供给燃料气体。

公开(公告)号：US09660272B2

公开(公告)日：2017-05-23

申请号：US14903311

申请日：2014-07-08

Applicant: SHOWA DENKO K.K.

Inventor： Yuji Ito ,  Junya Sakaguchi ,  Takuya Imai ,  Ryuji Monden ,  Masayuki Yoshimura

IPC: H01M4/86 ,  H01M4/90 ,  H01M4/92 ,  H01M8/10

CPC classification number: H01M4/8652 ,  H01M4/8657 ,  H01M4/9016 ,  H01M4/9041 ,  H01M4/92 ,  H01M4/925 ,  H01M8/10 ,  H01M2008/1095

Abstract: An oxygen reduction catalyst which includes composite particles including a portion including an inorganic metal compound and a portion containing carbon. The composite particles include a metal element M1, carbon, and oxygen as constituent elements; the amount of carbon atoms is 1 to 10 mol, and the amount of oxygen atoms is 1 to 3 mol, assuming that the total amount of atoms in the metal element M1 is 1 mol; a G-band and a D-band are present in a Raman spectrum, and a V/G ratio defined in an expression described below is 0.10 to 0.35: V/G ratio=(minimum value of spectral intensity in region V which is a region between G-band and D-band)/(peak intensity in G-band).

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：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：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.

公开(公告)号：US10230114B2

公开(公告)日：2019-03-12

申请号：US14901199

申请日：2014-05-28

Applicant: SHOWA DENKO K.K.

Inventor： Kousuke Miyazaki ,  Takuya Imai

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

Abstract: An oxygen reduction catalyst includes a composite particle, the composite particle including a carbon structure and particles each including a Group 4 metal element M1, the composite particle containing a Group 4 metal element M1, carbon, nitrogen and oxygen, the particles each including a Group 4 metal element M1 being dispersed in the carbon structure, and the composite particle having a percentage of mass loss (a) and a percentage of mass loss (b), which are represented by specific formulae, of not more than 15% and 25 to 70%, respectively.

公开(公告)号：US10720649B2

公开(公告)日：2020-07-21

申请号：US16495635

申请日：2018-03-22

Applicant: SHOWA DENKO K.K.

Inventor： Takuya Imai ,  Kazuo Furuya ,  Kunchan Lee

IPC: H01M4/90 ,  H01M8/1004 ,  H01M8/1018 ,  H01M4/86

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 CoS hexagonal structure in powder X-ray diffractometry, and having an S—Co/S—O peak area ratio of 2.1 to 8.9 in an S2p spectrum in X-ray photoelectron spectroscopic analysis.

公开(公告)号：US20150093681A1

公开(公告)日：2015-04-02

申请号：US14390520

申请日：2013-03-27

Applicant: SHOWA DENKO K.K.

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

IPC: H01M4/90 ,  H01M4/88

CPC classification number: H01M4/9016 ,  H01M4/88 ,  H01M4/9008 ,  H01M2008/1095 ,  H01M2300/0082

Abstract: An object of the present invention is to provide a fuel cell electrode catalyst with which high durability and a high maximum output density are obtained even when a fuel cell is continuously operated for long time; a method for producing the fuel cell electrode catalyst; a fuel cell in which the catalyst is used; and the like. A method for producing a fuel cell electrode catalyst is provided, the method including: a step of preparing a catalyst precursor comprising each atom of a metal element, carbon, nitrogen, and oxygen, and comprising copper as the metal element; and a contact step of bringing the catalyst precursor and an acid solution into contact with each other to obtain a catalyst.

Abstract translation: 本发明的目的在于提供即使燃料电池长时间连续运转也能获得高耐久性和高最大输出密度的燃料电池用电极催化剂， 燃料电池用电极催化剂的制造方法， 使用催化剂的燃料电池; 等等。 提供一种制造燃料电池用电极催化剂的方法，该方法包括：制备包含金属元素，碳，氮和氧的每个原子，并且包含铜作为金属元素的催化剂前体的步骤; 以及使催化剂前体和酸性溶液相互接触以获得催化剂的接触步骤。