The performance of supercapacitor electrodes developed from chemically activated carbon produced from waste tea
The performance of supercapacitor electrodes developed from chemically activated carbon produced from waste tea
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DOI：
10.1016/j.apsusc.2015.09.067
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发表时间：
2015-12-01
影响因子：
6.7
通讯作者：
Aktas, Zeki
中科院分区：
文献类型：
--
作者：
Inal, I. Isil Gurten;Holmes, Stuart M.;Aktas, Zeki
以废茶叶为原料，采用K2CO3或H3PO4处理的化学活化方法，制备了高微孔和中孔活性炭，并将其用作超级电容器电极。考察了活性炭的比表面积、孔结构特征和表面功能对电化学性能的影响。在水性电解质中，通过循环伏安法（CV）、阻抗谱（EIS）和恒电流充放电（GCD）测量来测试活性炭作为超级电容器电极的性能。结果表明，活性炭的孔结构和类型对超级电容器性能有显著影响。两种废茶基活性炭电极均表现出良好的循环稳定性。然而，尽管其较低的比表面积的高度微孔活性炭与K2CO3生产，表现出更好的电容性能比与H3PO4生产的中孔活性炭。(C)2015 Elsevier B.V.版权所有。
Highly microporous and mesoporous activated carbons were produced from waste tea for application as supercapacitor electrodes, utilising a chemical activation method involving treatment with either K2CO3 or H3PO4. The area, pore structure characteristics and surface functionality of the activated carbons were evaluated to investigate the influence on electrochemical performance. The performance of the activated carbons as supercapacitor electrodes was tested by cyclic voltammetry (CV), impedance spectroscopy (EIS) and galvanostatic charge-discharge (GCD) measurements, in an aqueous electrolyte. The results showed that the pore structure and type of the activated carbon have significant impact on the supercapacitor performance. Both waste tea-based activated carbon electrodes showed good cyclic stability. However, despite its lower specific surface area the highly microporous activated carbon produced with K2CO3, exhibited much better capacitive performance than that of the mesoporous activated carbon produced with H3PO4. (C) 2015 Elsevier B.V. All rights reserved.