Catalyst ink

H - Electricity – 01 – M

Patent

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Details

H01M 8/10 (2006.01) C09D 11/00 (2006.01) H01M 4/86 (2006.01) H01M 8/00 (2006.01)

Patent

CA 2506657

A catalyst ink is provided, comprising: 25-95 % by weight water; 1-50 % by weight of at least one solid catalyst, typically a highly dispersed platinum catalyst; 1 50 % by weight of at least one polymer electrolyte in acid (H+) form; and 1-50 % by weight of at least one polar aprotic organic solvent. The catalyst ink typically has a viscosity at 1 sec-1 of 10 Pa.bullet.sec or less. The catalyst ink typically does not ignite spontaneously when dried to completion in air at a temperature of 80~ C or greater. The catalyst ink may be used in the fabrication of membrane electrode assemblies for use in fuel cells.

L'invention concerne une encre catalyseur comportant: 25-95 % en poids d'eau, 1-50 % en poids d'au moins d'un catalyseur solide, typiquement un catalyseur à platine très fortement dispersé, 1-50 % en poids d'au moins un électrolyte polymère sous forme acide (H+), et 1-50 % en poids d'au moins un dissolvant organique aprotique polaire. L'encre catalyseur possède typiquement une viscosité à 1 sec -1 de 10 PA sec ou moins. Elle ne s'enflamme pas spontanément une fois sèche en présence d'air à une température de 80· C ou plus. Elle peut être employée dans la fabrication des électrodes de membrane utilisées dans des piles à combustible.

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