在第二部分，我們選用了各種不同的電解液，包含氧化還原活化電解液(redox-active electrolyte)，以及具有不同陽離子大小的電解液。在添加TEAI後的電解液中，其能夠透過離子進行氧化還原反應提供額外的擬電容值，但其庫侖效率與循環穩定性不佳，將不做深入的探討。於是，我們從另一方面去改善電容性能，透過改變電解液中陽離子的大小，使其更容易進入電極材料的微孔內，藉此來提高電容值，我們亦搭配不同孔洞結構的材料，對於其與電解液離子尺寸的關係做系統性的探討。;"Electrode Materials" and "Electrolyte" have a certain degree of influence on the performance of supercapacitor. Therefore, this study will discuss the effect of these two parts on the electrochemical properties of supercapacitor.
In the first part, we use activated carbon as the electrode material. By control its particle size and surface functional groups respectively, hoping to find a balance conditions between the coating, resistance and stability of electrode. First, we grind the activated carbon into different particle size to find the conditions that can achieve optimum capacitance properties.
In the second part, we selected a variety of different electrolytes, including a redox-active electrolyte, and electrolytes with different cation sizes. In the electrolyte after adding TEAI, it can provide an additional pseudocapacitance by the redox reaction of ions, but its coulombic efficiency and cycle stability are poor, and will not be discussed in detail. On the other hand, we improve the capacitance performance by changing the cation size of electrolyte, making it easier to enter the pores of the electrode material, thereby increasing the capacitance. We also use the material with different pore structure, to do a systematic discussion of its relationship to the ion size of the electrolyte.
