Hierarchically Porous Carbon as a High-Rate and Long-Life Electrode Material for High-Performance Supercapacitors

doi:10.1002/celc.201701286

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	Hierarchically Porous Carbon as a High-Rate and Long-Life Electrode Material for High-Performance Supercapacitors
	Guo, Junhong 1; Guo, Hongwei 1; Zhang, Li 2; Yang, Baoping 1; Cui, Jinfeng 1
刊名	ChemElectroChem
	2018-03-01
卷号	5 期号:5 页码:770-777
关键词	Capacitance Carbon Carbonization Cost effectiveness Electrochemical electrodes Electrolytes Ionic liquids Porous materials 1-ethyl-3-methylimidazolium tetrafluoroborate Hierarchically porous Hierarchically porous carbons High rate High specific capacitances High specific surface area Long life Three electrode-system
ISSN号	2196-0216
DOI	10.1002/celc.201701286
英文摘要	In this study, cost-effective hierarchically porous carbon (HPC) derived from starch was successfully prepared through a simple mixing and subsequent one-step carbonization method. Based on the three-dimensional interconnected hierarchically porous structure, HPC exhibits a high specific surface area of 2259.54 m2 g−1 and a specific capacitance of 385.7 F g−1 at 1 A g−1 in a three-electrode system. When the as-prepared carbon was employed to fabricate an aqueous symmetrical supercapacitor, the device displayed a high specific capacitance of 81.3 F g−1 at 1 A g−1, and even at 20 A g−1 the specific capacitance remained 64 F g−1 (capacity retention rate of 78.72 % compares with that at 1 A g−1), demonstrating an outstanding rate performance. This supercapacitor maintained a capacity retention of 100 % after 60 000 cycles at a current density of 5 A g−1, indicating superior long-term cycling stability. Furthermore, when the as-prepared carbon was employed to fabricate a symmetrical supercapacitor in ionic liquid (1-ethyl-3-methylimidazolium tetrafluoroborate, EMIMBF4) electrolyte, it ultimately achieved an ultrahigh energy density of 133.94 Wh kg−1 (power density of 1997.51 W kg−1) and a capacity retention rate of 83.3 % was maintained after 5000 cycles throughout a wide operating potential window of 0–4 V at 10 A g−1. © 2018 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:000426495000009
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150457]
专题	图书馆石油化工学院实验室建设与管理处
作者单位	1.Department of Chemical Engineering and Technology, School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Department of Physics, School of Science, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Guo, Junhong,Guo, Hongwei,Zhang, Li,et al. Hierarchically Porous Carbon as a High-Rate and Long-Life Electrode Material for High-Performance Supercapacitors[J]. ChemElectroChem,2018,5(5):770-777.
APA	Guo, Junhong,Guo, Hongwei,Zhang, Li,Yang, Baoping,&Cui, Jinfeng.(2018).Hierarchically Porous Carbon as a High-Rate and Long-Life Electrode Material for High-Performance Supercapacitors.ChemElectroChem,5(5),770-777.
MLA	Guo, Junhong,et al."Hierarchically Porous Carbon as a High-Rate and Long-Life Electrode Material for High-Performance Supercapacitors".ChemElectroChem 5.5(2018):770-777.