Brennstoffzelle

The aim of the invention is to provide a mechanically stable microreactor that can be subjected to high electrical loads and that is used in an electrode system of a fuel cell. To this end, a fuel component flows towards a filament (98) through at least one flow channel (10). Said filament is configured as a radially inner electroconducting electrode of the microreactor (97) and is linked with a radially outer membrane (101), the two structures supporting one another. The radially inner peripheral surface of the membrane (101), at least in some sections, is spaced apart from a supporting core (55) of the filament (98) by spokes (100), thereby forming at least one flow channel (102). Für die Leistungssteigerung einer Brennstoffzelle werden eine Vielzahl von einer Brennstoffkomponente durchströmte rohrartige Elemente 29 radial beabstandet von einer oder mehreren konzentrisch angeordneten Elektroden 33 eingefaßt.