期刊
POLYMERS
卷 4, 期 4, 页码 1645-1656出版社
MDPI AG
DOI: 10.3390/polym4041645
关键词
polymer electrolyte fuel cell; Pt catalyst; ionomer content; carbon nanofilaments; Marimo carbon; Nafion; MEA; nanocolloidal method
We have used fibrous carbon materials as polymer electrolyte fuel cell (PEFC) electrodes. We have examined the influence of the ionomer/carbon ratio on the performance of the PEFCs. The Marimo carbon is a kind of carbon with a spherical shape, and consists of carbon nanofilaments. Fibrous carbon materials have large specific surface areas without fine pores. The reactant gases and generated water can easily diffuse among the nanofilaments. The ionomer plays two roles; one is a proton transfer activity, and the other is binding the catalyst electrodes. An excess ionomer interferes with the diffusion of gases. The ionomer/carbon ratio should affect the performance of the PEFC, especially at a high current density.
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