The Marimo carbon as a polymer electrolyte fuel cell catalyst support

抄録

A fibrous carbon material has been used as the catalyst support of a polymer electrolyte fuel cell (PEFC) that is called Marimo carbon (MC). The Marimo carbon has a sufficient space volume between the each fiber without any fine pores. The Marimo carbon supported Pt catalyst (Pt/MC) should show a performance different from the traditional catalyst. The Pt/MC has a better performance than the traditional catalyst when the ionomer content is less than 15.5 wt% in the catalyst layer. The traditional catalyst needs about 25 wt% ionomer for optimal performance. By using the Marimo carbon, we simultaneously succeeded in increasing the cell performance and reducing the Pt catalyst and ionomer in the catalyst layer.