Three‐Dimensional Nitrogen‐Doped Hierarchical Porous Carbon as an Electrode for High‐Performance Supercapacitors |
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Authors: | Jing Tang Dr. Tao Wang Dr. Rahul R. Salunkhe Prof. Saad M. Alshehri Dr. Victor Malgras Prof. Yusuke Yamauchi |
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Affiliation: | 1. World Premier International (WPI) Research Center for Materials, Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1‐1 Namiki, Tsukuba, Ibaraki 305‐0044 (Japan);2. Faculty of Science and Engineering, Waseda University, 3‐4‐1 Okubo, Shinjuku, Tokyo 169‐8555 (Japan);3. Jiangsu Key Laboratory of Materials and Technology for Energy, Conversion, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016 (China);4. Department of Chemistry, College of Science, King Saud University, Riyadh 11451 (Saudi Arabia) |
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Abstract: | A facile and sustainable procedure for the synthesis of nitrogen‐doped hierarchical porous carbons with a three‐dimensional interconnected framework (NHPC‐3D) was developed. The strategy, based on a colloidal crystal‐templating method, utilizes nitrogenous dopamine as the precursor due to its unique properties, including self‐polymerization under mild alkaline conditions, coating onto various surfaces, a high carbonization yield, and well‐preserved nitrogen doping after heat treatment. The obtained NHPC‐3D possesses a high surface area of 1056 m2 g?1, a large pore volume of 2.56 cm3 g?1, and a high nitrogen content of 8.2 wt %. The NHPC‐3D is implemented as the electrode material of a supercapacitor and exhibits a specific capacitance as high as 252 F g?1 at a current density of 2 A g?1. The device also shows a high capacitance retention of 75.7 % at a higher current density of 20 A g?1 in aqueous electrolyte due to a sufficient surface area for charge accommodation, reversible pseudocapacitance, and minimized ion‐transport resistance, as a result of the advantageous interconnected hierarchical porous texture. These results showcase NHPC‐3D as a promising candidate for electrode materials in supercapacitors. |
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Keywords: | carbon doping electrochemistry mesoporous materials microporous materials |
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