| Optimization of Electrode Potential Ranges for Constructing 4.0 V Carbon-Based Supercapacitors | |
Ye, Meng1,2; Guo, Hongwei1,2; Dou, Qingyun1; Guo, Hui3; Hou, Ruilin1,4; Guo, Junhong2 ; Yan, Xingbin1
| |
| 2020-02-03 | |
| 会议录名称 | ChemElectroChem
 |
| 卷号 | 7 |
| 期号 | 3 |
| 页码 | 624-630 |
| 出版者 | Wiley-VCH Verlag |
| 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 |
| 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 |
| DOI | 10.1002/celc.201901922 |
| 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:000505808500001 |
| EI入藏号 | 20200308040154 |
| EI主题词 | Electric discharges |
| ISSN | 2196-0216 |
| 来源库 | Compendex |
| 分类代码 | 701.1 Electricity: Basic Concepts and Phenomena - 706.1.1 Electric Power Transmission - 804 Chemical Products Generally - 951 Materials Science |
| 引用统计 | |
| 文献类型 | 会议论文 |
| 条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/132650 |
| 专题 | 石油化工学院 |
| 作者单位 | 1.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; 2.Department of Chemical Engineering and Technology School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 3.School of Physical Science and Technology, Lanzhou University, Lanzhou; 730000, China; 4.Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China |
| 第一作者单位 | 兰州理工大学 |
| 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]:Wiley-VCH Verlag,2020:624-630. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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