Facile synthesis of activated carbon derived from Eucalyptus globulus seed as efficient electrode material for supercapacitors

被引:70
作者
Rajasekaran, Sofia Jeniffer [1 ]
Raghavan, Vimala [1 ]
机构
[1] Vellore Inst Technol, Ctr Nanotechnol Res, Vellore 632014, Tamil Nadu, India
关键词
Biomass; Activated carbon; Eucalyptus globulus seed (EGS); Potassium hydroxide; Supercapacitor; HIGH-ENERGY-DENSITY; POROUS CARBON; RICE HUSK; HYDROTHERMAL CARBONIZATION; CHEMICAL ACTIVATION; MESOPOROUS CARBONS; COTTON STALK; PERFORMANCE; CAPACITANCE; BIOMASS;
D O I
10.1016/j.diamond.2020.108038
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In the present study, activated carbon (AC) was prepared from Eucalyptus globulus seed (EGS) by a simple hydrothermal method followed by chemical activation using potassium hydroxide as the activating agent under different carbonization temperatures. X-ray diffraction and Raman spectroscopic analysis confirmed the amorphous and turbostratic disordered nature of the carbon. FT-IR analysis of the activated carbon samples shows the presence of N and O functional groups. Brunauer-Emmett-Teller (BET) specific surface area analysis of EGS derived activated carbon at 900 degrees C showed the highest specific surface area of 2388.38 m(2)g(-1) and exhibited a specific capacitance of 150 Fg(-1). The appearance of small and large graphitic pores with random orientation and approximately 88.3 wt% of carbon and 11.7 wt% of oxygen were confirmed by SEM/EDX analyses. Further to understand the electrocatalytic nature of the synthesizing carbon, the material was tested as an electrode for supercapacitors. The electrochemical performance was demonstrated by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance (EIS) studies. The electrochemical properties of EGS derived activated carbon demonstrate its potential application as high-performance and low-cost supercapacitor electrode material to fabricate energy storage devices.
引用
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页数:9
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