Wen, Sun Jung, Mi Joo, Oh-Shim Mho, Sun-il 2024-01-21T02:06:27Z 2024-01-21T02:06:27Z 2021-09-01 2006-10 1567-1739 https://pubs.kist.re.kr/handle/201004/135077 Well-ordered nanoporous alumina templates were fabricated by two-step anodization method by applying a constant voltage of 40 V in oxalic acid solution or of 25 V in sulfuric acid solution. The cylindrical pore diameter and pore density of the templates utilized for the carbon nanotube (CNT) growth were 86 +/- 5 nm and 1.2 x 10(10) cm(-2) in oxalic acid solution and 53 +/- 1 nm and 3.1 x 10(10) cm(-2) in sulfuric acid solution, respectively. The CNTs with uniform diameter of 50 +/- 10 nm (oxalic acid) and 44 +/- 2 nm (sulfuric acid) were grown on the porous alumina template as electrode materials for the electrochemical double layer capacitor (EDLC). The EDLC characteristics were examined by measuring the capacitances from cyclic voltammograms and the charge-discharge curves. The specific capacitances of the CNT electrodes are 30 +/- F/g (Phi = 50 +/- 10 nm) and 121 +/- 5 F/g (Phi = 44 +/- 2 nm). The high specific capacitance of the CNT electrode was achieved by using nanoporous alumina templates with the high pore density and the small and uniform pore diameter. (c) 2005 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV ELECTROCHEMICAL STORAGE CARBON NANOTUBES ANODIC ALUMINA ARRAYS ENERGY EDLC characteristics with high specific capacitance of the CNT electrodes grown on nanoporous alumina templates Article 10.1016/j.cap.2005.07.008 1 CURRENT APPLIED PHYSICS, v.6, no.6, pp.1012 - 1015 CURRENT APPLIED PHYSICS 6 6 1012 1015 scie scopus kci other 000239986300009 2-s2.0-33746304796 Materials Science, Multidisciplinary Physics, Applied Materials Science Physics Article; Proceedings Paper ELECTROCHEMICAL STORAGE CARBON NANOTUBES ANODIC ALUMINA ARRAYS ENERGY CNT EDLC specific capacitance alumina template