Nitrogen enriched mesoporous carbon spheres obtained by a facile method and its application for electrochemical capacitor |
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| Institution: | 1. National Base for International Science & Technology Cooperation, National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery, Hunan Province Key Laboratory of Electrochemical Energy Storage & Conversion, School of Chemistry, Xiangtan University, Xiangtan 411105, Hunan, China;2. Department of Chemistry, Chinese University of Hong Kong, Shatin, NT, Hong Kong;3. Key Laboratory of Materials Processing and Mold of Ministry of Education, Zhengzhou University, Henan 450001, China;1. Department of Radiation Oncology, University of Florida, Gainesville, USA;2. Department of Radiation Oncology, Wilmot Cancer Institute, University of Rochester Medical Center, USA;3. Tacoma Valley Radiation Oncology Center, USA;4. Department of Medicine, Division of Medical Oncology, Wilmot Cancer Institute, University of Rochester Medical Center, USA;1. Industrial Catalysis and Adsorption Technology (INCAT), Faculty of Engineering and Architecture, Ghent University, Valentin Vaerwyckweg 1, 9000 Ghent, Belgium;2. Laboratory for Chemical Technology, Faculty of Engineering and Architecture, Ghent University, Tech Lane Ghent Science Park Campus A 914, 9052 Zwijnaarde, Belgium;3. Center for Ordered Materials, Organometallics and Catalysis (COMOC), Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281-S3, 9000 Ghent, Belgium |
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| Abstract: | A kind of mesoporous carbon spheres (MCS) containing in-frame incorporated nitrogen has been prepared by a facile polymerization-induced colloid aggregation method. As the electrode material for electric double layer capacitor (EDLC) in 5 mol/L H2SO4, the MCS products present excellent specific capacitance as 211 F/g much larger than that of the most popularly applied activated carbon at a high discharge current density of 1 A/g. Its specific capacitance can still remain 200 F/g at 20 A/g. The superior electrochemical performance of MCS is associated with the following characteristics: high specific surface area (∼1330 m2/g) contributed mainly by the mesopores, uniform pore size as large as 29 nm and moderate content of nitrogen (10 wt%), which are the requirements for ideal supercapacitors. |
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