| 内容提要: |
Spherical hard carbon (SHC) was facilely prepared by one-step programmed heating of potato starch under inert atmosphere. The as-prepared hard carbon spherules preserved original spherical shapes of natural potato starch granules and had widely dispersed diameters, which are smaller than those of potato starch granules. Moreover, the surfaces of the hard carbon spherules were very smooth, which differed from those of potato starch granules with rough undulating appearances. In terms of microstructure, SHC was typical of disordered carbon with micropores throughout it. SHC was also evaluated as an anodic material for Li-ion batteries. The reversible capacity of SHC was about 531mAhg-1 with a first-cycle coulombic efficiency of 73.1 %. Furthermore, SHC showed stable cycling performances and good rate capability. |