Carbon nanofiber mat, preparation method thereof, and application thereof in all-vanadium redox flow battery

The invention discloses a carbon nanofiber mat, a preparation method thereof, and an application thereof in an all-vanadium redox flow battery. The carbon nanofiber mat takes high-molecular polymer as a carbon source, takes water-soluble polymer as a mold board, and is prepared by means of an electrostatic spinning method. The diameter of the carbon fiber ranges from 100 nm to 1000 nm, the specific surface area of the carbon fiber ranges from 30 m .g to 1000 m .g , and the porosity factor of the carbon fiber ranges from 90% to 95%. The carbon nanofiber mat material prepared by the above preparation method is used for electrodes of the all-vanadium redox flow battery, and the carbon nanofiber mat has excellent electrochemical performance, and is advantaged by excellent preparation performance, simple process, good process repeatability, low cost, environmental friendliness and the like.