於本研究中，我們使用Fe-Si催化劑於微波輔助化學氣相沉積(microwave plasma chemical vapor deposition, MPCVD)系統中於活性碳纖維布(activated carbon cloth, ACC)上成長奈米碳管(carbon nanotubes, CNTs)並應用於超級電容器之電極上。關於CNTs/ACCs電極之電容器效能，我們使用循環伏安法(cyclic voltammetry, CV)和電化學阻抗頻譜(electrochemical impedance spectroscopy, EIS)來進行調查，而其它電極性質則是使用掃描式電子顯微鏡(scanning electron microscopy, SEM)、穿透式電子顯微鏡(transmission electron microscopy, TEM)、拉曼光譜儀、氮氣等溫吸附和X光電子能譜儀(X-ray photoelectron spectroscopy, XPS)來分別調查電極的表面形態、微結構、品質、比表面積和表面化學組成。在CV之結果中，因為CNTs提升了離子於電極內之擴散速率，故CNT-grafted ACC電極充份表現出高速充放電之能力。而Nyquist plot更發現CNTs能有效地消除電極與集電器之接觸電阻，因此提升了CNT-grafted ACC電極之功率密度。經由這些分析和cycle life測試，顯示CNT-grafted ACC為一個高功率和長使用壽命之電化學電容器，最大功率密度可達10 kW/kg，使用壽命至少20,000圈以上。

In this study, CNTs were grafted onto ACC by Fe-Si catalyst using MPCVD method and used in supercapacitor electrode. The obtained CNTs/ACCs electrodes were examined its electrochemical capacitive behavior by CV and EIS in 2 M H2SO4 solution. Other analysis such as SEM, TEM, Raman spectroscopy, N2 isothermal adsorption, XPS were also used for investigating morphology, microstructure, quality, specific surface area, surface chemical composition, respectively. The CV results show a CNTs/ACCs electrode without quickly fading because the CNTs promoted the ion migration rate along the CNTs. The Nyquist plot shows CNT-grafted ACC electrode has an intimate contact with current collector by CNT bridges resulting in a 0 contact resistance and therefore enhances the power density. An electric double layer capacitor (EDLC) with long cycle life and high power density were demonstrated.

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