Study on Preparation and Electrochemical Properties of Biomass-Derived Spherical Activated Carbon
American Journal of Modern Energy
Volume 4, Issue 4, August 2018, Pages: 26-32
Received: Oct. 25, 2018;
Accepted: Dec. 4, 2018;
Published: Jan. 3, 2019
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Yuzhu Ma, Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin, P. R. China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, P. R. China
Cong Zhou, Key Laboratory for Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing, China
Baojun Yu, Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin, P. R. China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, P. R. China
Mingming Chen, Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin, P. R. China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, P. R. China
Chengyang Wang, Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin, P. R. China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, P. R. China
Spherical activated carbon (SPs) with hierarchical porous structure was prepared via a simple solvent evaporation method followed by an activation process using leonardite humic acid (LHA) as carbon source. The surface morphologies and pore parameters of the as-prepared SPs were analyzed by scanning electron microscope (SEM) and N2 physical adsorption-desorption instrument. The electrochemical performance of supercapacitors tested by galvanostatic charge-discharge (GCD), cyclic voltammograms (CV) and electrochemical impedance spectroscopy (EIS) are conducted in both aqueous and organic electrolyte. The SPs with high specific surface area (2034 m2 g-1) and pore volume (1.24 cm3 g-1) exhibit a superior higher specific capacitance of 319 F g-1 at a current density of 0.05 A g-1 in aqueous electrolyte compared with powdered activated carbon (SP1). In addition, SPs1 also exhibit a high initial specific capacitance of 154 F·g-1 at 0.05 A·g-1 and a higher capacitance retention of 96.4% than the bulked sample started from the same raw materials in organic electrolyte. These results suggest that the LHA-based spherical activated carbon should be a competitive and promising supercapacitor electrode material.
Study on Preparation and Electrochemical Properties of Biomass-Derived Spherical Activated Carbon, American Journal of Modern Energy.
Vol. 4, No. 4,
2018, pp. 26-32.
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