title: Nitrogen-doped carbon spheres: A new high-energy-density and long-life pseudo-capacitive electrode material for electrochemical flow capacitor.
abstract: One of the most challenging issues in developing electrochemical flow capacitor (EFC) technology is the design and synthesis of active electrode materials with high energy density and long cycle life. However, in practical cases, the energy density and cycle ability obtained currently cannot meet the practical need. In this work, we propose a new active material, nitrogen-doped carbon spheres (NCSs), as flowable electrodes for EFC application. The NCSs were prepared via one-pot hydrothermal synthesis in the presence of resorcinol/formaldehyde as carbon precursors and melamine as nitrogen precursor, followed by carbonization in nitrogen flow at various temperatures. The results of EFC experiments demonstrate that NCSs obtained at 800°C exhibit a high energy density of 13.5Whkg-1and an excellent cycle ability, indicating the superiority of NCSs for EFC application.
authors.affiliation: Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Materials Science, East China Normal University, Shanghai 200062, China.
authors.forename: Shujin
authors.initials: S
authors.lastname: Hou
authors.affiliation: Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Materials Science, East China Normal University, Shanghai 200062, China.
authors.forename: Miao
authors.initials: M
authors.lastname: Wang
authors.affiliation: Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Materials Science, East China Normal University, Shanghai 200062, China.
authors.forename: Xingtao
authors.initials: X
authors.lastname: Xu
authors.affiliation: School of Mechanical and Electrical Engineering, Yangtze Normal University, Chongqing 408100, China.
authors.forename: Yandong
authors.initials: Y
authors.lastname: Li
authors.affiliation: Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Materials Science, East China Normal University, Shanghai 200062, China.
authors.forename: Yanjiang
authors.initials: Y
authors.lastname: Li
authors.affiliation: Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Materials Science, East China Normal University, Shanghai 200062, China.
authors.forename: Ting
authors.initials: T
authors.lastname: Lu
authors.affiliation: Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Materials Science, East China Normal University, Shanghai 200062, China. Electronic address: lkpan@phy.ecnu.edu.cn.
authors.forename: Likun
authors.initials: L
authors.lastname: Pan
keywords: Electrochemical flow capacitor; High energy density; Long cycle life; Nitrogen-doped carbon spheres; Pseudo-capacitive electrode material