Manufacturing method of catalyst ink, manufacturing method of fuel cell, and fuel cell
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsYoshihiro Hori, Yoshito Endou, Sozaburo Ohashi, Noriaki Ishihara, Masao Okumura
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Abstract
A catalyst ink for improving the performance of catalyst electrodes in a fuel cell is produced by the following procedure. A catalyst dispersion is prepared by dispersing catalyst-supported particles as conductive particles with a catalyst supported thereon in a solvent. A gel material having viscoelasticity is prepared by mixing an ionomer with a volatile solvent. A catalyst ink having a desired viscosity is produced by stirring and mixing the catalyst dispersion with the gel material.
Claims16
A manufacturing method of a catalyst ink used for formation of a catalyst electrode, the manufacturing method comprising steps of:
- (a) dispersing catalyst-supported particles as conductive particles with a catalyst supported thereon in a solvent to prepare a catalyst dispersion;
- (b) mixing an ionomer with a volatile solvent to prepare a gel material;
- and
- (c) stirring and mixing the catalyst dispersion with the gel material to produce a catalyst ink,
- wherein a storage modulus G1 of the gel material prepared in the step (b) satisfies:
- about 150 Pa≦G1≦about 400 Pa at a strain amount of 1% under application of vibration having a frequency of 1 Hz.
Dependencies are inferred from the claim text.