Title:
ELECTRODE CATALYST LAYER, MEMBRANE ELECTRODE ASSEMBLY, AND SOLID POLYMER ELECTROLYTE FUEL CELL
Document Type and Number:
WIPO Patent Application WO/2019/189832
Kind Code:
A1
Abstract:
Provided is an electrode catalyst layer containing: a catalyst material; a conductive carrier for carrying the catalyst material; a polymer electrolyte containing a sulfonic acid group; and a fibrous material. The electrode catalyst layer has a first surface contacting a solid polymer electrolyte membrane, and a second surface facing the first surface. When the electrode catalyst layer is analyzed by means of time-of-flight secondary ion mass spectrometry (TOF-SIMS) for each of a plurality of positions in the thickness direction of the electrode catalyst layer from the first surface to the second surface, the first value is defined as the value obtained by dividing the peak intensity of SO3 (m/z 80) by the peak intensity of carbon (m/z 12) and the total thickness of the electrode catalyst layer. The rate of change of the first value with respect to the thickness of the electrode catalyst layer is −0.0020 or less.
Inventors:
TANIWAKI KAZUMA (JP)
MATSUURA TAKAHIRO (JP)
MATSUURA TAKAHIRO (JP)
Application Number:
PCT/JP2019/014195
Publication Date:
October 03, 2019
Filing Date:
March 29, 2019
Export Citation:
Assignee:
TOPPAN PRINTING CO LTD (JP)
International Classes:
H01M4/86; B01J23/42; H01M8/10
Domestic Patent References:
| WO2019088042A1 | 2019-05-09 |
Foreign References:
| JP2012243693A | 2012-12-10 | |||
| JP2005285574A | 2005-10-13 | |||
| JP2010251140A | 2010-11-04 |
Other References:
See also references of EP 3780193A4
Attorney, Agent or Firm:
ONDA Makoto et al. (JP)
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