公开(公告)号：US20230223556A1

公开(公告)日：2023-07-13

申请号：US18124366

申请日：2023-03-21

Applicant: TOPPAN INC.

Inventor： Naoki HAMADA

IPC: H01M4/90 ,  H01M8/1065 ,  H01M8/1004

CPC classification number: H01M4/9083 ,  H01M8/1065 ,  H01M8/1004 ,  H01M2008/1095

Abstract: An electrode catalyst layer that suppresses degradation due to repeated starting and stopping and has excellent durability, and a membrane electrode assembly using the electrode catalyst layer. The electrode catalyst layer is an electrode catalyst layer used in a polymer fuel electrolyte fuel cell, which contains carbon particles which support catalyst, a polymer electrolyte, and a fiber material which is at least one of a carbon fiber and an organic electrolyte fiber, and the thickness of the electrode catalyst layer after performing a start-stop test from 1 V to 1.5 V for 10,000 cycles is 70% or more of the thickness of the electrode catalyst layer before the start-stop test.

公开(公告)号：US20220302465A1

公开(公告)日：2022-09-22

申请号：US17830585

申请日：2022-06-02

Applicant: TOPPAN INC.

Inventor： Naoki HAMADA

IPC: H01M4/88 ,  H01M4/90

Abstract: A catalyst ink which can be directly applied to a polymer electrolyte membrane without producing wrinkles or cracks in the catalyst layer and without lowering performance, and a membrane electrode assembly using the catalyst ink. The catalyst ink for an electrode catalyst layer includes a solvent. The solvent contains catalyst-supported carbon particles which are carbon particles supporting a catalyst, a polymer electrolyte, and at least one of carbon fibers and organic electrolyte fibers. The solvent has a particle size distribution which a first peak lies in a range of 0.1 μm or more and 1 μm or less, and a second peak lies in a range of 1 μm or more and 10 μm or less. The catalyst ink is directly applied to a polymer electrolyte membrane to produce a membrane electrode assembly.