公开(公告)号：US11670780B2

公开(公告)日：2023-06-06

申请号：US17049871

申请日：2018-04-28

申请人： ENOMOTO CO., LTD. ,  UNIVERSITY OF YAMANASHI

发明人： Hiroshi Yanai ,  Mitsunori Nasu ,  Masahiro Watanabe

IPC分类号： H01M8/026 ,  H01M8/0234 ,  H01M8/0239 ,  H01M8/0243 ,  H01M8/241

CPC分类号： H01M8/026 ,  H01M8/0234 ,  H01M8/0239 ,  H01M8/0243 ,  H01M8/241

摘要： A fuel cell gas supply and diffusion layer includes a sheet-like porous body layer, and a plurality of gas passage grooves formed on one surface of the porous body layer in parallel and formed in a zigzag shape or a wave shape respectively. As viewed in a plan view, a first rectangular region where circumscribes one gas passage groove and a second rectangular region where circumscribes a gas passage groove adjacent to the one gas passage groove overlap along a region in contact each other. An overlapping region where the first rectangular region and the second rectangular region overlap exists at any depth position of the grooves. According to the fuel cell gas supply and diffusion layer, it is possible to increase a power generation efficiency of a fuel cell.

公开(公告)号：US11594737B2

公开(公告)日：2023-02-28

申请号：US16434031

申请日：2019-06-06

申请人： Mitsui Mining & Smelting Co., Ltd. ,  University of Yamanashi

发明人： Koji Taniguchi ,  Masahiro Watanabe ,  Makoto Uchida ,  Katsuyoshi Kakinuma

IPC分类号： H01M8/10 ,  H01M4/86 ,  H01M8/1004 ,  H01M4/90 ,  H01M4/92

摘要： A membrane-electrode assembly including a catalyst layer that includes a catalyst-supporting carrier in which a catalyst is supported on a carrier made of an inorganic oxide, and a highly hydrophobic substance having a higher degree of hydrophobicity than the inorganic oxide, the catalyst layer being formed on at least one surface of a polymer electrolyte membrane. It is preferable that, in the membrane-electrode assembly, the degree of hydrophobicity of the highly hydrophobic substance is from 0.5 vol % to 45 vol % at 25° C., the degree of hydrophobicity being defined as a concentration of methanol (vol %) when a light transmittance of a dispersion obtained by dispersing the highly hydrophobic substance in a mixed solution of water and methanol reaches 80%.

公开(公告)号：US10355285B2

公开(公告)日：2019-07-16

申请号：US15300075

申请日：2015-03-05

申请人： Mitsui Mining & Smelting Co., Ltd. ,  University of Yamanashi

发明人： Koji Taniguchi ,  Masahiro Watanabe ,  Makoto Uchida ,  Katsuyoshi Kakinuma

IPC分类号： H01M8/10 ,  H01M4/86 ,  H01M8/1004 ,  H01M4/90 ,  H01M4/92 ,  H01M8/1018

摘要： A membrane-electrode assembly including a catalyst layer that includes a catalyst-supporting carrier in which a catalyst is supported on a carrier made of an inorganic oxide, and a highly hydrophobic substance having a higher degree of hydrophobicity than the inorganic oxide, the catalyst layer being formed on at least one surface of a polymer electrolyte membrane. It is preferable that, in the membrane-electrode assembly, the degree of hydrophobicity of the highly hydrophobic substance is from 0.5 vol % to 45 vol % at 25° C., the degree of hydrophobicity being defined as a concentration of methanol (vol %) when a light transmittance of a dispersion obtained by dispersing the highly hydrophobic substance in a mixed solution of water and methanol reaches 80%.

公开(公告)号：US10333152B2

公开(公告)日：2019-06-25

申请号：US15234688

申请日：2016-08-11

申请人： UNIVERSITY OF YAMANASHI

发明人： Makoto Uchida ,  Katsuyoshi Kakinuma ,  Masahiro Watanabe ,  Akihiro Iiyama

IPC分类号： H01M8/04 ,  H01M4/92 ,  H01M8/04223 ,  H01M8/04225

摘要： A fuel cell system and a method of operating the same is provided that is capable of reducing degradation of a cathode catalyst of a fuel cell. A fuel cell system is provided that includes a fuel cell having a catalyst used for an anode, wherein a carrier of the catalyst is composed of a material with a property where electric resistance in an oxygen containing atmosphere is greater than electric resistance in a hydrogen atmosphere; and a control device configured to control the fuel cell, when supply of fuel gas is stopped during stoppage of operation of the fuel cell, to consume all or part of the fuel gas in a fuel gas chamber, followed by introducing oxygen containing gas into the fuel gas chamber.

公开(公告)号：US09431666B2

公开(公告)日：2016-08-30

申请号：US14749026

申请日：2015-06-24

申请人： University of Yamanashi

发明人： Masahiro Watanabe ,  Hiroyuki Uchida ,  Hisao Yamashita ,  Kenji Miyatake

IPC分类号： H01M8/0258 ,  H01M8/0206 ,  H01M8/021 ,  H01M8/0228 ,  H01M8/0239 ,  H01M8/02 ,  H01M8/04 ,  H01M8/10

CPC分类号： H01M8/0245 ,  H01M8/0206 ,  H01M8/021 ,  H01M8/0228 ,  H01M8/0234 ,  H01M8/0239 ,  H01M8/0243 ,  H01M8/0254 ,  H01M8/0267 ,  H01M8/04029 ,  H01M8/1018 ,  H01M2008/1095 ,  H01M2250/20 ,  Y02E60/50 ,  Y02P70/56 ,  Y02T90/32

摘要： A metallic separator for fuel cells having a metal plate, an electroconductive coating layer covering at least a surface in front and back surfaces of the metal plate which contacts a raw material and/or a reaction product, and an electroconductive channel-forming member disposed on a surface of the coating layer and forming a channel for the raw material and/or the reaction product and/or a channel for a cooling medium for cooling. A surface layer on the metal plate has a tensile residual stress within such a range that no stress-corrosion cracking occurs.