Urea-assisted template-less synthesis of heavily nitrogen-doped hollow carbon fibers for the anode material of lithium-ion batteries

摘要: A unique decomposition pathway of urea involving gas evolution was exploited as a way to introduce voids and mesopores into one-dimensional carbon nanofibers. While the conventional carbonization electrospun polyacrylonitrile (PAN) nanofibers produces microporous solid nanofibers, adding simple step coating over PAN prior drastically changes porous structure resulting Besides its role porogen for creation mesopores, serves an additional nitrogen source consequence, heavily nitrogen-doped fibers are produced. Compared with derived from pyrolysis PAN, hollow superior in lithium-ion battery applications because their larger specific surface area, higher doping, combined that beneficial (de-)intercalation. Due versatility simplicity, this urea-assisted template-less synthesis strategy paves new production various nanostructures.