Abstract: A new phosphorus-carbon negative electrode material based on red phosphorus and a preparation method thereof are disclosed. The material comprises red phosphorus and composite carbon nanospheres. The red phosphorus and the composite carbon nanospheres are mixed in a solvent and experience a thermal reaction to give a product, wherein a mass concentration of the composite carbon nanospheres in the solution is 10%-20%. The half-cell assembled by using the phosphorus-carbon composite material still maintains a low overpotential at a high current density of 2.5 mA·cm?2, and the capacity retention rate after 150 cycles still reaches 85%.

Abstract: The present disclosure provides a new phosphorus-carbon cathode material based on red phosphorus and a preparation method thereof, comprising red phosphorus and composite carbon nanospheres. The red phosphorus and the composite carbon nanospheres are mixed in a solvent and experience a thermal reaction to give a product, wherein a mass concentration of the composite carbon nanospheres in the solution is 10%-20%. The half-cell assembled by using the phosphorus-carbon composite material still maintains a low overpotential at a high current density of 2.5 mA·cm?2, and the capacity retention rate after 150 cycles still reaches 85%, achieving a double breakthrough in the cycle life and the capacity retention rate of the phosphorus-carbon composite material.