Catalyst ink for fuel cells

Abstract

To provide a catalyst ink that is less prone to cracking of the catalyst layer. [Solution] The fuel cell catalyst ink contains a solvent including water and solid components. In this fuel cell catalyst ink, the proportion of water to the fuel cell catalyst ink is 43% by mass or more and 62% by mass or less, and the proportion of solid components to the fuel cell catalyst ink is 4% by mass or more and less than 10% by mass.

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