活性碳之粒徑與表面官能基以及所搭配的電解質配方對超高電容特性之影響;The effect on supercapacitor property by particle size and functional group of activated carbon combine with different electrolyte composition

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Title:	活性碳之粒徑與表面官能基以及所搭配的電解質配方對超高電容特性之影響;The effect on supercapacitor property by particle size and functional group of activated carbon combine with different electrolyte composition
Authors:	陳侹浩;Chen, Ting-Hao
Contributors:	材料科學與工程研究所
Keywords:	超高電容;粒徑尺寸;官能基;離子尺寸;孔洞尺寸;supercapacitor;particle size;functional group;ion size;pore size
Date:	2017-05-15
Issue Date:	2017-10-27 13:16:44 (UTC+8)
Publisher:	國立中央大學
Abstract:	「電極材料」和「電解液」都對於超高電容器的性能具有一定程度的影響，因此本研究將針對此兩大部分進行影響電化學性質的效應探討，了解其分別在超高電容儲能方面扮演的角色。在第一部分，我們選用活性碳作為電極材料，分別針對其粒徑尺寸及表面官能基的含量進行控制，期望去尋找一個能夠在電極塗佈性、電極阻抗、電極穩定性之間取得平衡的最適化條件。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.
Appears in Collections:	[Institute of Materials Science and Engineering] Electronic Thesis & Dissertation

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