Abstract
Carbon microtubes (CMTs) were prepared by the carbonization of poplar catkins according to their natural microtubular structure. The CMTs were then used as the substrate for growing carbon nanotubes (CNTs) by chemical vapor deposition. The prepared three-dimensional CMT/CNT composites were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and Raman spectroscopy. Two-electrode supercapacitor cells constructed with the CMT/CNT showed a specific capacitance of 77 F·g -1 with 1 mol·L -1 Li 2SO 4 electrolyte, which is much higher than that for CMTs (23 F·g -1).
| Original language | English |
|---|---|
| Pages (from-to) | 2269-2275 |
| Number of pages | 7 |
| Journal | Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica |
| Volume | 28 |
| Issue number | 10 |
| DOIs | |
| State | Published - 2012 |
| Externally published | Yes |
Keywords
- Biomass
- Carbon microtube
- Carbon nanotube
- Poplar catkin
- Supercapacitor