Invention Grant
- Patent Title: Electrode catalyst layer, membrane electrode assembly, and polymer electrolyte fuel cell
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Application No.: US17029701Application Date: 2020-09-23
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Publication No.: US11575135B2Publication Date: 2023-02-07
- Inventor: Kazuma Taniwaki , Takahiro Matsuura
- Applicant: TOPPAN PRINTING CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: TOPPAN PRINTING CO., LTD.
- Current Assignee: TOPPAN PRINTING CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Foley & Lardner LLP
- Priority: JPJP2018-069986 20180330
- Main IPC: H01M4/90
- IPC: H01M4/90 ; H01M8/1004 ; H01M8/1032 ; H01M8/10

Abstract:
An electrode catalyst layer includes a catalyst material, a conductive carrier that supports the catalyst material, a polymer electrolyte containing a sulfonate group, and a fibrous material. The electrode catalyst layer includes a first surface configured to be in contact with the polymer electrolyte membrane, and a second surface facing away from the first surface. A first value is obtained by dividing a peak intensity of SO3 (m/z80) by a peak intensity of carbon (m/z12), and also dividing by a total thickness of the electrode catalyst layer, when the electrode catalyst layer is analyzed using time-of-flight secondary ion mass spectrometry (TOF-SIMS) at each of a plurality of positions in a thickness direction of the electrode catalyst layer from the first surface to the second surface. A rate of change of the first value with respect to a thickness of the electrode catalyst layer is −0.0020 or less.
Public/Granted literature
- US20210013520A1 ELECTRODE CATALYST LAYER, MEMBRANE ELECTRODE ASSEMBLY, AND POLYMER ELECTROLYTE FUEL CELL Public/Granted day:2021-01-14
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