Preparation method for improving yield of hard carbon material and application thereof

The invention relates to a preparation method for improving the yield of a hard carbon material and application thereof, and the preparation method comprises the following steps: drying ball-milled asphalt powder, and introducing an oxygen-containing functional group by using a vacuum plasma surface treatment machine, thereby not only inhibiting the generation of glassy carbon in hard carbon production, but also effectively enlarging the interlayer spacing of the hard carbon material, and improving the yield of the hard carbon material. Meanwhile, the yield of the hard carbon can be greatly improved, and the prepared hard carbon has the advantages of high specific capacity, good cycle performance and the like. 本发明涉及一种提高硬碳材料产率的制备方法及其应用，包括将球磨处理完成后的沥青粉干燥后再用真空等离子表面处理机引入含氧官能团，不仅能抑制硬碳生产中的玻璃碳产生，还能有效扩大硬碳材料的层间距，同时还能大大提高硬碳的产率，而且所制备的硬碳具有高比容量，良好的循环性能等优点。