Gas diffusion electrode base, laminate and fuel cell
AssigneeToray Industries, Inc.
InventorsMasamichi Utsunomiya, Yasuaki Tanimura, Toshiya Kamae, Junichi Urai
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Abstract
A gas diffusion electrode substrate has an electrically conductive porous substrate and a microporous layer on one side of the electrically conductive porous substrate. The microporous layer includes a dense portion A and a dense portion B. The dense portion A is a region containing a fluorine resin and a carbonaceous powder having a primary particle size of 20 nm to 39 nm. The dense portion A has a thickness of 30% to 100% with respect to the thickness of the microporous layer as 100% and a width of 10 μm to 200 μm. The dense portion B is a region containing a fluorine resin and a carbonaceous powder having a primary particle size of 40 nm to 70 nm.
Claims14
A gas diffusion electrode substrate comprising:
- an electrically conductive porous substrate and
- a microporous layer on one side of said electrically conductive porous substrate;
- wherein said microporous layer comprises a dense portion A and a dense portion B;
- wherein said dense portion A is a region including a fluorine resin and a carbonaceous powder having a primary particle size of 20 nm to 39 nm;
- wherein said dense portion A has a thickness of 30% to 100% with respect to the thickness of said microporous layer as 100% and a width of 10 μm to 200 μm;
- and
- wherein said dense portion B is a region including a fluorine resin and a carbonaceous powder having a primary particle size of 40 nm to 70 nm.
Dependencies are inferred from the claim text.