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Dominant role of wettability in improving the specific capacitance

文献类型：期刊论文

作者Liu, Tongtong2,3; Wang, Kai2,3; Chen, Yongxiu2,3; Zhao, Shuangliang1,4; Han, Yongsheng2,3
刊名GREEN ENERGY & ENVIRONMENT
出版日期2019-04-01
卷号4期号:2页码:171-179
关键词Supercapacitor Energy density Specific capacitance Effective surface area Wettability
ISSN号2096-2797
DOI10.1016/j.gee.2019.01.010
英文摘要Here we report a strategy to enhance the energy density of supercapacitors by increasing the utilization rate of the specific surface area (SSA) via wettability improvement. The nonporous gold (NPG) film is used as the electrodes and the ionic liquid [EMIM]BF4 is the electrolyte. When the electrode is coated by paraffin, an increase of the contact angle leads to a remarkable reduction of the specific capacitance. While when acetonitrile is added into the electrolyte, the contact angle is decreased and the utilization rate of SSA is improved, which results in an increase of the specific capacitance. The addition of isopropyl acetate into the electrolyte leads to a further increase of the specific capacitance. To generalize the role of the wettability in improving the energy density, a carbon-based electrode is evaluated in the solution of potassium hydroxide. An addition of propyl alcohol into the potassium hydroxide solution leads to an increase of the specific capacitance, as well as a long-term stability of the supercapacitor. The role of conductivity in this study is excluded by designing experiments. This paper highlights the significance of wettability in determining the specific capacitance, showing an alternative to improve the energy density of supercapacitors. (C) 2019, Institute of Process Engineering, Chinese Academy of Sciences. Publishing services by Elsevier B.V.
WOS关键词SUPERCAPACITOR ELECTRODE ; SURFACE-AREA ; CARBON MATERIALS ; ENERGY-STORAGE ; PERFORMANCE ; ADSORPTION ; POWER ; NANOSHEETS ; STRATEGY ; OXIDE
资助项目National Natural Science Foundation of China[91534123] ; National Natural Science Foundation of China[91834303] ; National Natural Science Foundation of China[U1862117] ; State Key Laboratory of Multiphase Complex Systems[MPCS-2017-A-01] ; State key laboratory of Multiphase Complex Systems (MPCS) Facility Upgradation Program
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Energy & Fuels ; Engineering
语种英语
WOS记录号WOS:000493350600011
出版者KEAI PUBLISHING LTD
资助机构National Natural Science Foundation of China ; State Key Laboratory of Multiphase Complex Systems ; State key laboratory of Multiphase Complex Systems (MPCS) Facility Upgradation Program
源URL[http://ir.ipe.ac.cn/handle/122111/39107]  
专题中国科学院过程工程研究所
通讯作者Han, Yongsheng
作者单位1.East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China
4.East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Tongtong,Wang, Kai,Chen, Yongxiu,et al. Dominant role of wettability in improving the specific capacitance[J]. GREEN ENERGY & ENVIRONMENT,2019,4(2):171-179.
APA Liu, Tongtong,Wang, Kai,Chen, Yongxiu,Zhao, Shuangliang,&Han, Yongsheng.(2019).Dominant role of wettability in improving the specific capacitance.GREEN ENERGY & ENVIRONMENT,4(2),171-179.
MLA Liu, Tongtong,et al."Dominant role of wettability in improving the specific capacitance".GREEN ENERGY & ENVIRONMENT 4.2(2019):171-179.

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来源：过程工程研究所

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