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J Colloid Interface Sci. 2017 Apr 1;491:161-166. doi: 10.1016/j.jcis.2016.12.033. Epub 2016 Dec 19.

Nitrogen-doped carbon spheres: A new high-energy-density and long-life pseudo-capacitive electrode material for electrochemical flow capacitor.

Author information

1
Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Materials Science, East China Normal University, Shanghai 200062, China.
2
School of Mechanical and Electrical Engineering, Yangtze Normal University, Chongqing 408100, China.
3
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.

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-1 and an excellent cycle ability, indicating the superiority of NCSs for EFC application.

KEYWORDS:

Electrochemical flow capacitor; High energy density; Long cycle life; Nitrogen-doped carbon spheres; Pseudo-capacitive electrode material

PMID:
28027465
DOI:
10.1016/j.jcis.2016.12.033

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