Method for improving retention rate of carbon nanofibers in carbon paper

The invention discloses a method for improving the retention rate of carbon nanofibers in carbon paper, which comprises the following steps: adding 0.1-0.5 g by mass of carbon nanofibers into 15-25 ml by mass of ethanol, then carrying out ultrasonic treatment for 30-50 minutes, then applying the solution subjected to ultrasonic treatment to a spray coating machine to carry out spray coating on the carbon paper, putting the coated carbon paper into a flat plate fluidized bed, and carrying out heat preservation for 30-50 minutes, thereby obtaining the retention rate of the carbon nanofibers in the carbon paper. The temperature of an upper plate is set to be 110-130 DEG C, the temperature of a lower plate is set to be 110-130 DEG C, the pressure is set to be 5-7 MPa, and the carbon paper is pressed for 15-25 min through a flat plate fluidized bed, so that the carbon paper filled with the coated carbon nanofibers is obtained. According to the invention, the retention rate of the carbon nanofibers as a filling age