Back to results
US 2019/0198906 A1Published application
Fuel cell catalyst layer, membrane electrode assembly, and fuel cell
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsMotohiro SAKATA, Takeshi MINAMIURA, Shinichiro IMURA, Hitoshi ISHIMOTO, Kazuya YAMASAKI, Chiho NOBUMORI, Yukihiro SHIMASAKI, Tsutomu FUJII
Life of this patent
Estimating the term…
Abstract
Provided is a fuel cell catalyst layer including: a fibrous carbon material; catalyst particles; a particulate carbon material; and a proton-conductive resin, wherein a region A including at least the fibrous carbon material in a state of an agglomerated body and a region B including at least the catalyst particles, the particulate carbon material, and the proton-conductive resin are formed, the region A being disposed in an island form in the region B.
Claims12
A fuel cell catalyst layer comprising:
- a fibrous carbon material;
- catalyst particles;
- a particulate carbon material;
- and
- a proton-conductive resin,
- wherein a region A including at least the fibrous carbon material in a state of an agglomerated body and a region B including at least the catalyst particles, the particulate carbon material, and the proton-conductive resin are formed, the region A being disposed in an island form in the region B.
3 more elements
A membrane electrode assembly comprising:
- a catalyst layer including a first principal surface and a second principal surface;
- a gas diffusion layer disposed on the first principal surface;
- and
- an electrolyte membrane disposed on the second principal surface,
- wherein the catalyst layer includes a fibrous carbon material, catalyst particles, a particulate carbon material, and a proton-conductive resin,
- the fibrous carbon material includes a first fibrous carbon material oriented along the first principal surface, and a second fibrous carbon material oriented along a thickness direction of the catalyst layer, and,
- where T represents the thickness of the catalyst layer,
- a ratio R1:FF1/SF1 of the number FF1 of pieces of the first fibrous carbon material to the number SF1 of pieces of the second fibrous carbon material in a first region extending from the first principal surface of the catalyst layer to 0.25 T,
- a ratio R2:FF2/SF2 of the number FF2 of pieces of the first fibrous carbon material to the number SF2 of pieces of the second fibrous carbon material in a second region extending from the second principal surface of the catalyst layer to 0.25 T, and
- a ratio R3:FF3/SF3 of the number FF3 of pieces of the first fibrous carbon material to the number SF3 of pieces of the second fibrous carbon material in a third region of the catalyst layer other than the first region and the second region
- satisfy at least one of the relationships:
- R3<R1 and R3<R2.
9 more elements
A fuel cell comprising:
- an electrolyte membrane;
- a first catalyst layer and a second catalyst layer that are disposed so as to sandwich the electrolyte membrane;
- a first gas diffusion layer and a second gas diffusion layer that are disposed so as to sandwich the electrolyte membrane via the first catalyst layer and the second catalyst layer respectively;
- and
- a first separator and a second separator that are disposed so as to sandwich the electrolyte membrane via the first gas diffusion layer and the second gas diffusion layer respectively,
- wherein the first catalyst layer includes a fibrous carbon material, catalyst particles, a particulate carbon material, and a proton-conductive resin,
- the fibrous carbon material includes a first fibrous carbon material oriented along a first principal surface of the first catalyst layer that opposes the first gas diffusion layer, and a second fibrous carbon material oriented along a thickness direction of the first catalyst layer, and,
- where T represents the thickness of the first catalyst layer,
- a ratio R1:FF1/SF1 of the number FF1 of pieces of the first fibrous carbon material to the number SF1 of pieces of the second fibrous carbon material in a first region extending from the first principal surface of the first catalyst layer to 0.25 T,
- a ratio R2:FF2/SF2 of the number FF2 of pieces of the first fibrous carbon material to the number SF2 of pieces of the second fibrous carbon material in a second region extending from the second principal surface of the first catalyst layer to 0.25 T, and
- a ratio R3:FF3/SF3 of the number FF3 of pieces of the first fibrous carbon material to the number SF3 of pieces of the second fibrous carbon material in a third region of the first catalyst layer other than the first region and the second region
- satisfy at least one of the relationships:
- R3<R1 and R3<R2.
10 more elements
Dependencies are inferred from the claim text.