- 學位論文
以電鍍法製作Ni(OH)2薄膜與其電化學電容特性之研究
The Studies of Electrochemical Capacity Properties of Ni(OH)2 Thin Film by Electrochemical Deposition
摘要
近年來超級電容研究很廣泛，相對於電池的大能量密度，超級電容像燃料電池一樣變成了理想的電動車的儲能元件。氫氧化鎳擁有高比電容值與高能量密度的特性，所以氫氧化鎳用來作超電容是個很有前途的正極材料。 本實驗目的在於以電鍍法製備氫氧化鎳電極，並且添加1%的CTAB 或SDS界面活性劑來增加薄膜附著性來達到增加比電容值的效果。本實驗以0.1M硝酸鎳水溶液當作電鍍液。以白金電極當作對電極，甘汞電極當作參考電極，將純鎳片當作工作電極。 本實驗利用電鍍法製備出來的氫氧化鎳薄膜，使用SEM觀察表面形貌，XRD分析結晶性以及相，FTIR分析鍵結，RAMAN分析成分以及電化學循環伏安法計算比電容值，來觀察不同介面活性劑與不同電壓下比電容值的改變。本實驗所電鍍出來的薄膜為非晶質的，而添加了1%CTAB與1%SDS 電鍍出來的氫氧化鎳薄膜，其電容值為26.6 F/g與14.39 F/g，均優於未添加界面活性劑時的電容值11.83 F/g。
關鍵字
氫氧化鎳並列摘要
The electrichenical supercapacitor has been extensively investigated in recent years because of its much bigger power density compared with battery,which become a promising power source for electrical vehicles energy-stored instruments like fuel cells.Nickel hydroxide has been expected to be a very promising positive material for supercapacitor. This research purpose to prepare Nickel Hydroxides by using electroplate method and add 1% CTAB surfactant or 1% SDS surfactant to improve thin film Adhesiveness to increase specific capacitance. This research use Nickel Nitrate as Plating solution,platinum electrode as counter electrode, calomel electrode as reference electrode,pure nickel piece as working electrode. This reaserch prepare Nickel hydroxides thin films which use electroplate method.The film use scanning electric microscope to observe surface morphology,confirm the phase and Crystallinity by scaning X-ray diffraction, check the bonding by Fourier Transform Infrared Spectroscopy and calculate the specific capacitance by electrochemical cyclic-voltammetry Method.We observed different surfactant and different voltage to analyze the change of specific capacitance.This research which the film made by electroplate is amorphous. The specific capacitance of the Nickel Hydroxide with1%CTAB (26.6 F/g) and 1%SDS (14.39 F/g) are both higher than not add surfactant (11.83 F/g).