Method of manufacturing separator for fuel cells
AssigneesNippon Pillar Packing Co., Ltd., Toyota Jidosha Kabushiki Kaisha
InventorsTsunemori Yoshida, Katsunori Sugita
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Abstract
A separator for fuel cells is provided, which has excellent electrical conductivity, mechanical strength and gas impermeability. The separator is a molded article of a carbon-phenol resin molding compound obtained by reacting a phenol with an aldehyde in the presence of a catalyst, while mixing them with a carbon powder. As the catalyst, it is possible to use at least one selected from tertiary amines, carbonates, hydroxides and oxides of alkali metals or alkali earth metals. It is preferred that a content of nitrogen constituent in the molding compound is 0.3 wt % or less, and a carbon content in the molding compound is within a range of 75 wt % to 97 wt %.
Claims5
A method of manufacturing a separator for fuel cells, comprising the steps of:
- reacting a phenol with an aldehyde in the presence of a catalyst, while mixing with a graphite powder, to obtain a graphite-phenol resin molding compound;
- and
- molding the molding compound to obtain said separator,
- wherein a graphite content in the molding compound is within a range of 75 wt % to 97 wt %,
- wherein said catalyst is at least one selected from tertiary amines, carbonates, hydroxides and oxides of alkali metals or alkali earth metals, and
- wherein a content of nitrogen constituent in the molding compound is 0.3 wt % or less.
Dependencies are inferred from the claim text.