Fuel cell electrode catalyst solution and production method therefor
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsSeiji Mizuno, Tatsuya Kawahara
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Abstract
The invention improves operability in forming a catalyst electrode, and improves performance of a fuel cell. A catalyst-loaded carbon is dispersed in a mixed solution of an azeotropic solvent and ion exchanged water. An electrolyte solution is added to the dispersed solution. A solvent, such as ethanol or the like, is added to adjust the viscosity and the water content of the solution, thereby providing an electrode catalyst solution. The use of the obtained solution as an ink for forming a catalyst layer through printing improves printing characteristic and drying characteristic.
Claims8
A production method for an electrode catalyst solution for use for forming an electrode of a solid polymer fuel cell, comprising:
- (a) mixing a water and a solvent which, when alone, has a higher boiling point than the water and which, when in an aqueous solution, boils together with the water at a predetermined temperature;
- and
- (b) dispersing a catalyst-loaded carbon powder in a solution obtained in the step (a).
Dependencies are inferred from the claim text.