摘要:
The object of the invention is a process for the preparation of metal-doped felt fabric made of carbon fibers, wherein a textile structure of pre-oxidized polyacrylonitrile fibers is carbonized at temperatures of up to 1500 °C and wherein polyacrylonitrile and/or oxidized polyacrylonitrile as precursor fibers are functionalized with a metal precursor.
摘要:
The subject matter of the invention is a method for producing coated active materials, wherein the surfaces of the active materials are aqueously coated and the coated particles are subsequently carbonized.
摘要:
The invention relates to a gas diffusion layer (GDL) on the basis of carbon fibers utilized in polymer electrolyte membrane (PEM) fuel cells having structured hydrophilic properties, wherein materials having hydrophilic properties are selected from the group of metal oxides at a mean domain size of 0.5 to 80 μm being present in the gas diffusion layer as hydrophilic wicks.
摘要:
The invention relates to a porous electrode substrate having the form of a web, comprising a structure made of carbon fibers and a carbon matrix, wherein the specific surface area, porosity and pore distribution is determined by the carbon matrix.
摘要:
Membrane electrode assembly for PEM fuel cells, consisting of a proton exchange membrane, two catalyst layers (anode and cathode catalyst layer), and two gas diffusion layers, the anodic one of which is based on a carbon fiber paper and is provided with a microporous layer consisting of graphite, carbon nanotubes or carbon nanofibers, and PTFE, whereas the cathodic gas diffusion layer is based on a carbon fiber structure and is provided with a microporous layer based on carbon black, carbon nanotubes and/or carbon nanofibers, and PTFE.