Synthesis of Carbon Nanotube/Graphene Composites by One-Step Chemical Vapor Deposition for Electrodes of Electrochemical Capacitors

Table 1

The carbon nanotube packing density (calculated from Figures 4 and 7) of carbon nanotube/graphene composites grown by one-step CVD at different growing temperatures and times.

Carbon nanotube/graphene composites growing conditions	Carbon nanotube packing density, cm^−2
One-step CVD at 850°C for 10 min	7.86 × 10^7
One-step CVD at 900°C for 10 min	9.34 × 10^6
One-step CVD at 950°C for 10 min	2.80 × 10^6
One-step CVD at 850°C for 15 min	8.06 × 10^8
One-step CVD at 850°C for 20 min	8.87 × 10^8