| 摘要 |
A gas diffusion layer comprises a substrate consisting of a carbon-containing material and a microporous layer, wherein the gas diffusion layer can be obtained by a method which comprises the following steps: i) dispersing carbon black with a BET surface area of at most 200 m2/g, carbon nanotubes with a BET surface area of at least 200 m2/g and with an average outer diameter (d50) of at most 25 nm and a dispersion medium-containing mixture with a shearing rate of at least 1,000 seconds-1 and/or such that, in the dispersion produced, at least 90% of all carbon nanotubes have a mean agglomerate size of at most 25 µm, ii) applying the dispersion produced in step i) to at least one portion of at least one side of the substrate, and iii) drying the dispersion applied in step ii). |
