Toyota Jidosha Kabushiki Kaisha

Tohru Oda

Tatsuya Kawahara

Katsuhiko Kinoshita

A durability test device that examines durability of a membrane electrode assembly used for a polymer electrolyte fuel cell includes: a voltage application device that applies a voltage from one surface of the membrane electrode assembly to the other surface thereof; a current measurement device that measures a current flowing from the one surface to the other surface by the application of the voltage; and a control section that controls the voltage application device to apply the voltage to the membrane electrode assembly while sweeping the voltage over a plurality of consecutive voltage regions in such a manner that a first sweep rate of the voltage to be applied in the first voltage region in which a measured current value includes a peak caused due to carbon oxidation is set lower than that in the second voltage region that does not include the first voltage region.

Durability test device of membrane electrode assembly and durability test method thereof

The paste for diffusion layer formation used for formation of a GDL for a fuel cell contains a solvent, and conductive particles, a first surfactant having a first decomposition temperature and a second surfactant having a second decomposition temperature that is lower than the first decomposition temperature, all of which are dispersed in the solvent. The paste for diffusion layer formation contains a lower amount of the first surfactant than the second surfactant on a weight basis.

Paste for diffusion layer formation and production method thereof and production method of gas diffusion layer

A fuel cell comprises an electrolyte membrane; first and second catalyst layers formed on respective faces of the electrolyte membrane; and first and second reinforcing layers holding therebetween the electrolyte membrane and the first and second catalyst layers, wherein the first catalyst layer and the first reinforcing layer are joined together with a force of not less than a specific joint strength that suppresses expansion and contraction of the electrolyte membrane, and the second catalyst layer and the second reinforcing layer are joined together with a force of less than a specific joint strength that releases a stress due to expansion and contraction of the electrolyte membrane, or the second catalyst layer and the second reinforcing layer are not joined together.

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Toyota, Japan

Tohru Oda