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

doi:10.1002/celc.201701286

	Hierarchically Porous Carbon as a High-Rate and Long-Life Electrode Material for High-Performance Supercapacitors
	Guo, Junhong1 ; Guo, Hongwei 1; Zhang, Li2 ; Yang, Baoping1 ; Cui, Jinfeng1
	2018-03-01
发表期刊	ChemElectroChem
ISSN	2196-0216
卷号	5 期号:5 页码:770-777
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
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
DOI	10.1002/celc.201701286
收录类别	EI ; SCIE
语种	英语
WOS研究方向	Electrochemistry
WOS类目	Electrochemistry
WOS记录号	WOS:000426495000009
出版者	Wiley-VCH Verlag
EI入藏号	20180604751320
EI主题词	Supercapacitor
EI分类号	701.1 Electricity: Basic Concepts and Phenomena ; 802.2 Chemical Reactions ; 804 Chemical Products Generally ; 911.2 Industrial Economics ; 951 Materials Science
引用统计	被引频次：37[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/150457
专题	实验室建设与管理处石油化工学院理学院图书馆
通讯作者	Cui, Jinfeng
作者单位	1.Lanzhou Univ Technol, Sch Petrochem Engn, Dept Chem Engn & Technol, Lanzhou 730050, Gansu, Peoples R China; 2.Lanzhou Univ Technol, Sch Sci, Dept Phys, Lanzhou 730050, Gansu, Peoples R China
第一作者单位	兰州理工大学
通讯作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
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.