Volume 4, Issue 4, August 2018, Page: 26-32
Study on Preparation and Electrochemical Properties of Biomass-Derived Spherical Activated Carbon
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
Received: Oct. 25, 2018;       Accepted: Dec. 4, 2018;       Published: Jan. 3, 2019
DOI: 10.11648/j.ajme.20180404.11      View  93      Downloads  21
Abstract
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.
Keywords
Humic Acid, Spherical Activated Carbon, Pore Structure, Supercapacitors
To cite this article
Yuzhu Ma, Cong Zhou, Baojun Yu, Mingming Chen, Chengyang Wang, 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. doi: 10.11648/j.ajme.20180404.11
Copyright
Copyright © 2018 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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