Transforming waste sugar solution into N-doped hierarchical porous carbon for high performance supercapacitors in aqueous electrolytes and ionic liquid |
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| Affiliation: | 1. Key Laboratory of Coal Processing and Efficient Utilization (Ministry of Education), China University of Mining & Technology, Xuzhou, 221116, Jiangsu, China;2. State Key Laboratory of High-Efficient Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan, 750021, Ningxia, China;1. Moscow State Institute of International Relations University (MGIMO), 76 Vernadsky Ave., Moscow, 119454, Russia;2. Center of Energy Diplomacy and Geopolitics, 17 Gogolevsky Blv., Moscow, 119019, Russia;3. CEO of Scientific Technical Centre “TATA” Limited, Sarov, Nizhny Novgorod Region, Str. 29, office 306, 607183, Moscow, Russia;1. College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, 70 Yuhua Road, Shijiazhuang, 050018, China;2. CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, China;1. Graduate Program in Materials Science and Engineering, Technology Development Center, Federal University of Pelotas, 96010-000, Pelotas, RS, Brazil;2. PPMec, Federal University of Rio Grande-FURG, Campus Carreiros, Itália Ave, km 8, 96203e900, Rio Grande, RS, Brazil;3. Laboratory of Lipidomic and Bio-Organic, Federal University of Pelotas, Av. Eliseu Macieu building 31, 96010-900, Capão do Leão, RS, Brazil;4. Interdisciplinary Laboratory of Ceramics, IQ, São Paulo State University, Av. Prof. 16, Francisco Degni, 55, 14800-060, Araraquara, SP, Brazil |
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| Abstract: | Waste sugar solution is a by-product in the process of manufacturing vitamin C. Nowadays, the unused industrial waste residues are transformed into high efficient energy storage devices, such as supercapacitors electrodes, which are worth exploring because they are consistent with the concept of green and sustainable development. In this paper, a nitrogen-doped hierarchical porous carbon are obtained via pre-carbonization and KOH activation. The as-prepared material, possessed proper pore size distribution, large specific surface area and nitrogen-doping, exhibits good electrochemical performance, such as a high specific capacitance of 342 F g−1 (0.1 A g−1), good stability with 95% capacitance retention after 15,000 cycles in 6 M KOH. Moreover, the supercapacitors deliver a high energy density of 25.6 and 65.9 W h kg−1 in the 1 M Na2SO4 and EMIMBF4, respectively. The good electrochemical performance illustrates that the nitrogen-doped hierarchically porous carbon derived from the waste sugar solution is a potential candidate for energy storage. |
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| Keywords: | Nitrogen-doped Porous carbon High energy density Supercapacitors |
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