| abstract |
A carbon airgel has a platelet shape, the platelet-shaped carbon airgel being stabilized by an electrically non-conductive, inorganic, fleece-like fiber material and being hydrophobized by silylation. To produce the platelet-shaped carbon airgel using a carbon-containing starting solution, the following process steps are carried out: DOLLAR A - a mold is wetted with a release agent, DOLLAR A - the starting solution is placed in the mold, DOLLAR A - a nonwoven fabric is inserted into the mold, the thickness of which is lower than the fill level of the starting solution in the form, DOLLAR A - the starting solution is gelled, DOLLAR A - the gel is pyrolyzed, DOLLAR A - the surface of the resulting carbon airgel is treated with water or steam and, if necessary, an inorganic solvent, and DOLLAR A - hydrophobized by silylation. DOLLAR A The platelet-shaped carbon airgel thus produced is suitable as gas diffusion electrodes in fuel cells. |