Assembly and Electric Double-Layer Capacitive Behavior of Three-Dimensional Carbon Nanocluster Electrodes
Multi-scale and/or multi-disciplinary approach to process-product innovation
Nanotechnology & Nanomanufacturing (T3-1P)
Keywords: carbon nanocluster; electric double-layer capacitance; cyclic voltammetry; mesoporous carbon electrode; AC impedance
A chemical vapor deposition used for growing the secondary nanotubes decorated with primary multi-walled carbon nanotubes (CNTs) was investigated. Low (700 °C) and high (900 °C) growth temperatures lead to grow different shapes of 3-D carbon cluster. This can be attributed from the fact that at the elevated temperature, the small Ni particles start to merge into isolated large clusters due to the increased mobility and mass transport, thus resulting in the morphology transformation of carbon network. N2 physisorption indicated that the growth of secondary nanotubes improves both of specific surface area and micropore fraction. The electrochemical behavior of carbon electrodes in H2SO4 was examined using ac impedance spectroscopy. Equivalent circuit analysis indicated that both of the specific double-layer capacitance and electrical connection resistance between the CNTs and the backing plate were found to significantly enhanced due to the presence of secondary nanotubes.
Presented Tuesday 18, 13:30 to 15:00, in session Nanotechnology & Nanomanufacturing (T3-1P).
