| abstract |
A method for producing a carbon fiber material is disclosed, the method comprising the steps ofa) Preparation of a solution of polyacrylonitrile in a suitable organic solventb) Electrospinning of the solution obtained in a) and drying of the obtained fiber materialc) Crosslinking of the obtained fiber material by heating to 150 to 350° C. in an air or oxygen atmosphere for 1 to 30 hd) Carbonization of the obtained fiber material in an inert gas atmosphere at a temperature in the range of 500 to 2,500° C.,characterized in thatno silicon, sulfur, metal compounds, intermetallic compounds, silicon compounds and/or sulfur compounds are added to the polyacrylonitrile solution in step a) and that neither stabilization nor surface modification steps are carried out with the fiber material by treatment with chemical reagents and/or exposure to tensile stress.Also disclosed is a carbon fiber material obtainable by the above process, as well as a carbon fiber material, characterized in that it has a proportion of ultramicropores V<0.4 nm of 0.01 to 10, more preferably 0.02 to 5, even more preferably 0.025 to 0.1, most preferably 0.03 to 0.06 cm3/g, determined by CO2 adsorption tests and evaluation with DFT and GC-MC simulation. |