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Vol.49, No.5, 419 ~ 425, 2011
Title
Characterization of Electric Double-Layer Capacitors with Carbon Nanotubes Directly Synthesized on a Copper Plate as a Current Collector
정동원 Dong Won Jung , 이창수 Chang Soo Lee , 박순 Soon Park , 오은석 Eun Souk Oh
Abstract
Carbon nanotubes (CNTs) were directly synthesized on a copper (Cu) plate as a current collector by the catalytic thermal vapor deposition method for an electric double-layer capacitor (EDLC) electrode. The diameters of vertically aligned CNTs grown on the Cu plate were 20~30 nm. From cyclic voltammetry (CV) results, the CNTs/Cu electrode showed high specific capacitance with typical profiles of EDLCs. Rectangular-shaped CV curves suggested that the CNTs/Cu electrode could be an excellent candidate for an EDLC electrode. The specific capacitances were in a range of 25~75 F/g with a scan rate of 10~100 mV/s and KOH electrolyte concentration 1~6 M, and were maintained up to 1000 charge/discharge cycles due to strong adhesion between the Cu substrate and the CNTs.
Key Words
carbon, chemical synthesis, electrochemistry, scanning electron microscopy(SEM) electric double-Layer capacitor (EDLC)
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