| 摘要: | 本研究計畫擬利用三年的時間，研究開發以離子液體作為電解液的高性能、安全、環保的超高電容器。利用離子液體特殊的物理與化學性質，搭配奈米級金屬氧化物電極(如：RuO2, MnO2, Co3O4, Co(OH)2, Fe3O4等)或氧化物/高孔隙碳複合電極，所組成的新一代超高電容器預期將具有高電壓、高能量密度、高功率密度、寬操作溫度範圍，以及長充放電使用壽命等優異特性。第一個計畫執行年度主要的研究目標為合成低黏滯度、高導電度、大操作電位範圍，且能可靠應用於高溫環境的離子液體電解液，並瞭解其組成陰陽離子的物理化學性質對各種氧化物電極以及複合材料電極擬電容性質的影響。第二執行年度的工作重點一方面為利用奈米結構之氧化物電極以增進其於離子液體中的電化學活性；另一方面則為針對不同化學成分與奈米孔隙度的金屬氧化物電極，設計具特定陰陽離子組合的離子液體(或添加外來離子)以作為適當的搭配，將電極的擬電容性能最佳化。在深入瞭解各種電極在不同離子液體中的儲能機構之後，第三年度規劃的主要工作目標是整合所得的研發成果，完整地提出一組的以離子液體為電解液之全電容儲能元件。並建立非對稱式正負極材料之超高電容器的組裝技術，積極於電容器廠配合，將研究的成果具體應用化。 This is a three-year research project that aims at developing a high-performance supercapacitor device, which incorporates ionic liquid (IL) electrolyte. The proposed new-generation supercapacitor is safe to operate and environmentally friendly. Combining the unique physicochemical characteristics of ILs and nano-structured metal oxide electrodes (or oxide/carbon composite electrodes), the large cell voltage, high energy density, high powder density, wide operation temperature range, and long cycle life of the constructed supercapacitors are anticipated. The major research task in the first year is to synthesize ILs with low viscosity, high conductivity, high thermal stability, and large potential windows for supercapacitor applications. In addition, effects of the size, shape, and chemistry of the constituent cations and anions in ILs on the pseudocapacitive properties of various oxide electrodes (e.g. RuO2, MnO2, Co3O4, Co(OH)2, Fe3O4, etc.) and composite electrodes will also be systematically investigated. In the second year, two strategies are going to be used to optimize the pseudocapacitive performance of the electrodes. One approach is to create a nano-architectured oxide electrode, promoting the electrochemical reactivity with IL electrolytes. The other is to design (or tailor) the composition of ILs (either modifying the constituent ions or adding foreign ions) to match the porosity, crystal structure, and chemistry of various electrodes, attempting to improve the pseudocapacitive reaction (That is why IL is considered as “task specific liquid”!). Based on the fundamental understanding of the energy storage mechanism of the supercapacitors, which incorporate various oxide electrodes and IL electrolytes, the main research focus in the third year is to construct a full-cell capacitor device. Assembling asymmetric anode and cathode electrodes will be attempted to further enlarge the cell voltage, which is beneficial for increasing both the energy density and power density of a supercapacitor. With the established knowledge and techniques, we will look forward to cooperating with supercapacitor industrials trying to put our laboratory results into practice applications. 研究期間：9904 ~ 10003 |
