Journal
CHINESE CHEMICAL LETTERS
Volume 32, Issue 1, Pages 184-189Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cclet.2020.11.004
Keywords
Porous carbon spheres; Hollow structure; Supercapacitors; Ionic electrolyte; Energy density
Categories
Funding
- National Natural Science Foundation of China [21805219, 51521001]
- National Key Research and Development Program of China [2016YFA0202603]
- Program of Introducing Talents of Discipline to Universities [B17034]
- Yellow Crane Talent (Science & Technology) Program of Wuhan City
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The N-doped hollow carbon spheres, with ultrahigh surface area and capacitance, demonstrate impressive performances in symmetric supercapacitors, making them a promising candidate electrode material.
Porous carbon spheres represent an ideal family of electrode materials for supercapacitors because of the high surface area, ideal conductivity, negligible aggregation, and ability to achieve space efficient packing. However, the development of new synthetic methods towards porous carbon spheres still remains a great challenge. Herein, N-doped hollow carbon spheres with an ultrahigh surface area of 2044 m(2)/g have been designed based on the phenylenediamine-formaldehyde chemistry. When applied in symmetric supercapacitors with ionic electrolyte (EMIBF4), the obtained N-doped hollow carbon spheres demonstrate a high capacitance of 234 F/g, affording an ultrahigh energy density of 114.8 Wh/kg. Excellent cycling stability has also been achieved. The impressive capacitive performances make the phenylenediamine-formaldehyde resin derived N-doped carbon a promising candidate electrode material for supercapacitors. (C) 2020 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
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