A fuel cell having a polymer electrolyte membrane containing fluorine atoms distributed along the polymer chains, and metal conductors and/or catalysts, is protected from fluoride ion degradation of the metal components by a fluoride ion sequestering agent fixed in the cell or flowing through the cell. In a preferred embodiment, the fluoride ion scavenger comprises a suitable number of azacrown moieties attached to polymer constituents in the electrolyte membrane or in electrodes.

 
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< Electrolyte film and fuel cell

> Proton conductive polymer and fuel cell using the same

> Catalyst, electrode for fuel electrode in fuel cell, and fuel cell

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