Journal
ELECTROCHIMICA ACTA
Volume 130, Issue -, Pages 464-469Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.03.015
Keywords
Endothelium corneum gigeriae galli; Nitrogen-doped porous carbon; Supercapacitor; High specific surface area
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Funding
- National Nature Science Foundation of China [21203067]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars of State Education Ministry, SRG-Fd of City University of Hong Kong [7004081]
- Innovation and Technology Fund, HKSAR [ITS/244/11]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [2013R1A1A2007365]
- National Research Foundation of Korea [2013R1A1A2007365] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Endothelium corneum gigeriae galli derived 3D hierarchical nitrogen-doped porous carbon was for the first time prepared by preliminary carbonization at 450 degrees C and final KOH activation at high temperatures. The surface and structural properties of the as-synthesized samples are analyzed with Brunauer-Emmett-Teller surface analyzer apparatus, X-Ray Diffractometer, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectrometer. The electrochemical performances are analyzed by cyclic voltammetry, galvanostatic charge/discharge cycling and electrochemical impedance spectroscopy. The obtained results show that the sample carbonized at 900 degrees C possesses the SSA of 2149.9 m(2) g(-1), average micropore diameter of 1.78 nm, and exhibits the highest initial specific capacitance of 198.0 F g(-1) at current density of 1 A g(-1) in 6 M KOH solution. It retains good specific capacitance retention of 91.6% after 3000 charge/discharge cycles at current density of 2 A g(-1). (C) 2014 Elsevier Ltd. All rights reserved.
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