Synthesis of Nitrogen-Doped Microporous/Mesoporous Carbon with Enhanced Pseudocapacitive Behavior for High-Performance Symmetrical Supercapacitors

doi:10.1002/celc.202000473

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	Synthesis of Nitrogen-Doped Microporous/Mesoporous Carbon with Enhanced Pseudocapacitive Behavior for High-Performance Symmetrical Supercapacitors
	Guo, Jia-Kang 1; Liu, Jian 1; Kong, Ling-Bin 1,2
刊名	ChemElectroChem
	2020-06-17
卷号	7 期号:12 页码:2592-2598
关键词	Capacitance Carbon Electrodes Interpenetrating polymer networks Microporosity Nitrogen Phase separation Porous materials Potassium hydroxide Sodium sulfate Supercapacitor Electrode material Hierarchical porous carbons High energy densities Homogeneous distribution One-step heat treatments Pseudocapacitive behavior Specific capacitance Three electrode-system
ISSN号	2196-0216
DOI	10.1002/celc.202000473
英文摘要	Hierarchical porous carbons are widely used as electrode materials for supercapacitors; however, promotion of the specific capacitance and energy density remains a challenge. Here, we design a N-doped hierarchical microporous/mesoporous carbon (NMC) fabricated through the one-step heat treatment of interpenetrating polymer networks. The pores are obtained by phase separation of the two network polymers with physical penetration and subsequent pyrolysis of the sacrificial polymers to shape the rich micropores/mesopores on the pore wall of a honeycomb-like carbon skeleton formed from carbon precursors. In particular, the optimized NMC possesses an ultrahigh specific surface area of 1969.0 m2 g−1 and a pore volume of 1.092 cm3 g−1, as well as homogeneous distribution of elemental nitrogen. The NMC also exhibits a distinguished specific capacitance of 261.6 F g−1 at 0.5 A g−1 and an excellent cycling stability of 100 % after 10 000 cycles in 6 M KOH in a three-electrode system. Impressively, in situ heteroatom doping of NMC effectively enhances the specific capacitance, and the proportion of pseudocapacitive performance can be as high as 25.4 % of the total capacitance. Symmetrical supercapacitors assembled with two protruding electrodes deliver a high energy density of 23.9 W h kg−1 at 225 W kg−1 and an outstanding cycling stability of 93 % after 10 000 cycles in 1 M Na2SO4. All of these features indicate that N-doped microporous/mesoporous carbon is a promising electrode material for supercapacitors. © 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
WOS研究方向	Electrochemistry
语种	英语
出版者	Wiley-VCH Verlag
WOS记录号	WOS:000535055200001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115044]
专题	石油化工学院材料科学与工程学院
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 2.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Guo, Jia-Kang,Liu, Jian,Kong, Ling-Bin. Synthesis of Nitrogen-Doped Microporous/Mesoporous Carbon with Enhanced Pseudocapacitive Behavior for High-Performance Symmetrical Supercapacitors[J]. ChemElectroChem,2020,7(12):2592-2598.
APA	Guo, Jia-Kang,Liu, Jian,&Kong, Ling-Bin.(2020).Synthesis of Nitrogen-Doped Microporous/Mesoporous Carbon with Enhanced Pseudocapacitive Behavior for High-Performance Symmetrical Supercapacitors.ChemElectroChem,7(12),2592-2598.
MLA	Guo, Jia-Kang,et al."Synthesis of Nitrogen-Doped Microporous/Mesoporous Carbon with Enhanced Pseudocapacitive Behavior for High-Performance Symmetrical Supercapacitors".ChemElectroChem 7.12(2020):2592-2598.