Optimization of Electrode Potential Ranges for Constructing 4.0 V Carbon-Based Supercapacitors

doi:10.1002/celc.201901922

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	Optimization of Electrode Potential Ranges for Constructing 4.0 V Carbon-Based Supercapacitors
	Ye, Meng 2,3; Guo, Hongwei 2,3; Dou, Qingyun 2; Guo, Hui 1; Hou, Ruilin 2,4; Guo, Junhong 3; Yan, Xingbin 2
	2020-02-03
关键词	Activated carbon Carbon Electric power transmission Electrodes Ionic liquids Porous materials SupercapacitorActivated carbon electrode Charging strategies Electrode potentials Higher energy density Ionic liquid electrolytes Mass balancing Potential windows Theoretical values
卷号	7
期号	3
DOI	10.1002/celc.201901922
页码	624-630
英文摘要	Supercapacitors (SCs) based on porous carbon exhibit high power delivery/uptake and ultra-long cycle life but are limited by their low energy density. A critical problem is that their theoretical operating potential windows (OPWs) cannot be fully utilized, owing to the unreasonable potential ranges of electrodes, leading to significantly decreased energy density. Here, the electrode potential ranges of SCs based on activated carbon electrodes and ionic liquid electrolytes were successfully optimized by mass-balancing and pre-charging strategies. Consequently, the OPWs of the two resultant SCs were extended to the theoretical value of 4.0 V, and superior energy densities of 112.33 Wh kg−1 and 132.56 Wh kg−1 were obtained, respectively. Moreover, the features of these two strategies were compared. Mass-balancing is easy to implement, but the corresponding SC shows a relatively low energy density because of the different mass loadings of two electrodes. Pre-charging enables SC to achieve higher energy density, but it is difficult to control due to self-discharge. © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
会议录	ChemElectroChem
会议录出版者	Wiley-VCH Verlag
语种	英语
ISSN号	2196-0216
WOS研究方向	Electrochemistry
WOS记录号	WOS:000505808500001
内容类型	会议论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/132650]
专题	石油化工学院
作者单位	1.School of Physical Science and Technology, Lanzhou University, Lanzhou; 730000, China; 2.Laboratory of Clean Energy Chemistry and Materials State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou; 730000, China; 3.Department of Chemical Engineering and Technology School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 4.Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China
推荐引用方式 GB/T 7714	Ye, Meng,Guo, Hongwei,Dou, Qingyun,et al. Optimization of Electrode Potential Ranges for Constructing 4.0 V Carbon-Based Supercapacitors[C]. 见:.