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Title:
ELECTRODE CATALYST LAYER FOR FUEL CELLS AND SOLID POLYMER FUEL CELL USING SAME
Document Type and Number:
WIPO Patent Application WO/2020/031479
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing an electrode catalyst layer for fuel cells which is capable of effectively preventing a cell voltage drop in a high-electric-current-density region. The electrode catalyst layer for fuel cells according to the present invention comprises: a catalyst support carrier comprising a catalyst being carried on a carrier including an electroconductive inorganic oxide; and a hydrophilic material. The hydrophilic material is an aggregate of hydrophilic particles having electrical conductivity. The hydrophilic material content in the catalyst layer is 2% by mass or more, but less than 20% by mass with respect to the total of the carrier and the hydrophilic material. The ratio of a particle diameter d1 of the hydrophilic particles to a particle diameter D of the catalyst support carrier is 0.5-3.0. The ratio of a particle diameter d2 of the hydrophilic material to a thickness T of the catalyst layer is 0.1-1.2.

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Inventors:
MOGI SATOSHI (JP)
WATANABE HIROMU (JP)
TSUKUDA RYOMA (JP)
ABE NAOHIKO (JP)
Application Number:
PCT/JP2019/022072
Publication Date:
February 13, 2020
Filing Date:
June 04, 2019
Export Citation:
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Assignee:
MITSUI MINING & SMELTING CO (JP)
International Classes:
H01M4/86; H01M4/92; H01M8/10
Domestic Patent References:
WO2016063922A12016-04-28
WO2017208761A12017-12-07
WO2017022499A12017-02-09
WO2016098399A12016-06-23
Foreign References:
JP2005174835A2005-06-30
JP2002216777A2002-08-02
JP2009070584A2009-04-02
US20110143256A12011-06-16
JP2014160671A2014-09-04
JP2009099486A2009-05-07
US20170141407A12017-05-18
Other References:
See also references of EP 3836266A4
Attorney, Agent or Firm:
SHOWA INTERNATIONAL PATENT FIRM (JP)
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