SODIUM ION BATTERY NEGATIVE ELECTRODE MATERIAL RICH IN DEFECTS, PREPARATION METHOD THEREFOR AND APPLICATION THEREOF

摘要

A sodium ion battery negative electrode material that is rich in defects, a preparation method therefor and an application thereof, wherein the preparation method comprises the following steps: washing and drying a carbon-based material; adding defects at defect sites of the material by means of heating under a reducing atmosphere at 100-1200°C for 1-24 hours; then performing secondary sintering under an inert atmosphere at 1200-2500°C and maintaining the temperature for 0.5-48 hours to obtain a final product. The operation process is simple and easy, the price is inexpensive, the energy density is relatively high, the rate performance is good, and the sodium ion battery negative electrode material obtained according to the described method is an excellent sodium ion battery negative electrode material.