High surface area activated carbon from rice husk as a high performance supercapacitor electrode

被引：414

作者：

Teo, Ellie Yi Lih ^{[1
]}

Muniandy, Lingeswarran ^{[2
]}

Ng, Eng-Poh ^{[2
]}

Adam, Farook ^{[2
]}

Mohamed, Abdul Rahman ^{[3
]}

Jose, Rajan ^{[1
]}

Chong, Kwok Feng ^{[1
]}

机构：

[1] Univ Malaysia Pahang, Fac Ind Sci & Technol, Gambang 26300, Kuantan, Malaysia

[2] Univ Sains Malaysia, Sch Chem Sci, George Town 11800, Malaysia

[3] Univ Sains Malaysia, Sch Chem Engn, Engn Campus, Nibong Tebal 14300, Pulau Pinang, Malaysia

来源：

ELECTROCHIMICA ACTA | 2016年 / 192卷

关键词：

Biowaste; energy storage; supercapacitors; electrochemistry; activated carbon; DOUBLE-LAYER CAPACITOR; CHEMICAL ACTIVATION; WASTE; NAOH; ADSORPTION; STORAGE; FIBERS; LIGNIN; ENERGY; KOH;

D O I：

10.1016/j.electacta.2016.01.140

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this study, we report on the application of high surface area activated carbon (AC) derived from rice husks as a supercapacitor electrode. The prepared AC was free from Bronsted or Lewis acid sites, thus making the electrical double layer capacitance as the main charge storage mechanism. Three samples of AC with different surface areas were prepared at different activation temperatures and studied electrochemically using cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy. All AC samples exhibited good electrochemical performance as supercapacitor electrode. The maximum specific capacitance (147 F g(-1)) was obtained by the AC sample (surface area of 2696 m(2) g(-1)) which was prepared at an activation temperature of 850 degrees C. Detailed impedance studies revealed the low resistivity (0.23 Omega) of AC sample and the fast frequency response (0.11 s) of the supercapacitor electrode. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：110 / 119

页数：10

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