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US 8,263,285 B2Granted
Membrane-electrode assembly and fuel cell having the same
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsYasushi Araki, Kimihide Horio
Life of this patent
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Abstract
A membrane-electrode assembly (10) is characterized by including an electrolytic membrane (11) having proton conductivity and a first electrode (12) jointed on the electrolytic membrane. The first electrode has a catalyst (121, 122) and a first ionomer (123) covering the catalyst and acting as a proton exchange group. A ratio of water-generation amount (mol/min) at rated output point of the membrane-electrode assembly/volume (cm3) of the first ionomer in the first electrode is 1350 or larger.
Claims8
A membrane-electrode assembly comprising:
- an electrolytic membrane having proton conductivity;
- and
- a first electrode jointed on the electrolytic membrane,
- wherein:
- the first electrode has a catalyst and a first ionomer covering the catalyst and acting as a proton exchange group;
- and
- a ratio of water-generation amount (mol/min) at rated output point of the membrane-electrode assembly/volume (cm3) of the first ionomer in the first electrode is 1610 or larger.
4 more elements
A fuel cell comprising:
- a membrane-electrode assembly comprising an electrolytic membrane having proton conductivity and a first electrode jointed on the electrolytic membrane, wherein the first electrode has a catalyst and a first ionomer covering the catalyst and acting as a proton exchange group, and a ratio of water-generation amount (mol/min) at rated output point of the membrane-electrode assembly/volume (cm3) of the first ionomer in the first electrode is 1610 or larger;
- and
- separators holding the membrane-electrode assembly therebetween.
Dependencies are inferred from the claim text.