title: Three-Dimensional Nitrogen-Doped Hierarchical Porous Carbon as an Electrode for High-Performance Supercapacitors.
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 m(2)  g(-1) , a large pore volume of 2.56 cm(3)  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.
authors.affiliation: World Premier International (WPI) Research Center for Materials, Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan).|Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555 (Japan).
authors.forename: Jing
authors.initials: J
authors.lastname: Tang
authors.affiliation: 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).
authors.forename: Tao
authors.initials: T
authors.lastname: Wang
authors.affiliation: World Premier International (WPI) Research Center for Materials, Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan).
authors.forename: Rahul R
authors.initials: RR
authors.lastname: Salunkhe
authors.affiliation: Department of Chemistry, College of Science, King Saud University, Riyadh 11451 (Saudi Arabia).
authors.forename: Saad M
authors.initials: SM
authors.lastname: Alshehri
authors.affiliation: World Premier International (WPI) Research Center for Materials, Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan).
authors.forename: Victor
authors.initials: V
authors.lastname: Malgras
authors.affiliation: World Premier International (WPI) Research Center for Materials, Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan). Yamauchi.Yusuke@nims.go.jp.|Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555 (Japan). Yamauchi.Yusuke@nims.go.jp.|Department of Chemistry, College of Science, King Saud University, Riyadh 11451 (Saudi Arabia). Yamauchi.Yusuke@nims.go.jp.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Yamauchi
keywords: carbon; doping; electrochemistry; mesoporous materials; microporous materials