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公开(公告)号：US10355285B2
公开(公告)日：2019-07-16
申请号：US15300075
申请日：2015-03-05
Inventor： Koji Taniguchi , Masahiro Watanabe , Makoto Uchida , Katsuyoshi Kakinuma
IPC: H01M8/10 , H01M4/86 , H01M8/1004 , H01M4/90 , H01M4/92 , H01M8/1018
Abstract: 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%.
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公开(公告)号：US10333152B2
公开(公告)日：2019-06-25
申请号：US15234688
申请日：2016-08-11
Applicant: UNIVERSITY OF YAMANASHI
Inventor： Makoto Uchida , Katsuyoshi Kakinuma , Masahiro Watanabe , Akihiro Iiyama
IPC: H01M8/04 , H01M4/92 , H01M8/04223 , H01M8/04225
Abstract: 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.
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