Effects of Alumina Films on N-Doped Carbon Nanotubes/Graphene Composites as Anode Materials of Lithium-Ion Batteries

Figure 5

The effects of power levels and time periods for sputtering alumina onto N-doped carbon nanotubes/graphene composites on the initial coulombic efficiency of alumina/N-doped carbon nanotubes/graphene for the coin cell.