TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The diameter of carbon nanofiber is 50-400 nm. The density of carbon nanofiber is 0.7407-2 g/cm3. The electrical conductivity of carbon nanofiber is more than 2 S/cm. The pore size of carbon nanofiber is 0.5-3 nm. The felt further comprises at least one of silicon oxide of formula (SiOx), metal oxide, metal alkoxide, graphene, carbon nanotube, graphite particle and carbon black particle. The viscosity of the spinning solution is 3000-28000 cP.x = 0-2Preferred Method: The high-speed winding electrospinning process is carried out at rate of 1000-2040 m/minute under 10-30 kV voltage, when the distance between the collector and the spinneret is 5-20 cm. The oxidative stabilization process is carried out by applying 1.5-4 MPa pressure on the precursor fiber felt. The carbonization process is carried out under inert atmosphere while maintaining the temperature to 800-1500 degrees C for 1 hour with a heating rate of 5 degrees C/minute. The activation process is carried out under inert atmosphere with a heating rate of 5 degrees C/minute while maintaining the temperature at 800-1500 degrees C for 1 hour under steam or carbon dioxide condition.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The carbon fiber precursor material includes polyacrylonitrile, polyacrylonitrile copolymer, polyvinyl alcohol, polyimide, polybenzimidazole, phenol resin, epoxy resin, polyvinyl chloride, polystyrene, polyaniline, polymethylmethacrylate, polyvinylidene chloride, polyvinylidene fluoride or various pitch. EXAMPLE - Polyacrylonitrile with molecular weight of 150000 was dissolved in dimethylformamide to obtain the spinning solution. Polyacrylonitrile polymer spinning solution was electrospun under voltage of 18 kV with a winding rate of 2040 m/minute to obtain unidirectional polyacrylonitrile-based precursor fiber felt. The polyacrylonitrile-based precursor fiber felt was subjected to oxidative stabilization at 200-300 degrees C for 1 hour under 3.6 MPa pressure with air atmosphere and heating rate of 1 degrees C/minute to obtained chlorinated fiber felt. The obtained chlorinated fiber felt was carbonized at 800 degrees C for 1 hour under an inert atmosphere to obtain unidirectional polyacrylonitrile-based carbon nanofiber felt.