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Tuning interfacial ion distribution to improve energy density of supercapacitors

文献类型：期刊论文

作者Chen, Yunyi2,3; Qing, Leying4,5,6; Liu, Tongtong2,3; Zhao, Shuangliang1,5,6,7; Han, Yongsheng2,3
刊名NANO ENERGY
出版日期2022-11-01
卷号102页码:10
关键词Supercapacitor Capacitance Ions distribution Energy density Density functional theory
ISSN号2211-2855
DOI10.1016/j.nanoen.2022.107660
英文摘要Supercapacitors as energy carriers have the advantages of high-power efficiency and long-term stability. An improvement of their energy density promises a solution to make up for the weakness of secondary batteries at a high rate of applications. Here we report an attempt to improve the energy density of supercapacitor by tuning ions arrangement at the electrode-electrolyte interface. Upon the theoretical analysis with classical density functional theory (CDFT), we find that the capacitance of the supercapacitor is maximized at a mediate con-centration of electrolytes, i.e., 1.0 M, where ions accumulate near the electrode surface and display a few multilayered oscillatory distributions. Further, by adjusting the dielectric constant of electrolyte solution and the electrode surface voltage, the interfacial ion distribution is tuned to optimize the energy density of super -capacitors. The theoretical results are corroborated by designed experiments, confirming the role of interfacial ion distribution in specific capacitance. This study shows that an appropriate interfacial ion distribution is beneficial to obtaining high capacitance, highlighting an unusual solution to improve the energy density of supercapacitors.
WOS关键词DOUBLE-LAYER CAPACITORS ; FUNCTIONAL THEORY ; CARBON ; PERFORMANCE ; SIMULATIONS ; MODEL
资助项目National Natural Science Foundation of China[91934302] ; National Natural Science Foundation of China[21978298] ; National Natural Science Foundation of China[U1862117] ; Innovation Academy for Green Manufacture, Chinese Academy of Sciences[IAGM-2019-A13] ; State Key Laboratory of Multiphase Complex Systems[MPCS-2021-A- 05]
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种英语
WOS记录号WOS:000848737500006
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; Innovation Academy for Green Manufacture, Chinese Academy of Sciences ; State Key Laboratory of Multiphase Complex Systems
源URL[http://ir.ipe.ac.cn/handle/122111/54543]  
专题中国科学院过程工程研究所
通讯作者Zhao, Shuangliang; Han, Yongsheng
作者单位1.Guangxi Univ, Guangxi Key Lab Petrochem Resource Proc & Proc Int, Nanning 530004, Peoples R China
2.Chinese Acad Sci, Inst Proc Eng, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Sch Chem Eng, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, State Key Lab Polymer Phys & Chem, Beijing, Peoples R China
5.East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China
6.East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China
7.Guangxi Univ, Sch Chem & Chem Engn, Nanning 530004, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Yunyi,Qing, Leying,Liu, Tongtong,et al. Tuning interfacial ion distribution to improve energy density of supercapacitors[J]. NANO ENERGY,2022,102:10.
APA Chen, Yunyi,Qing, Leying,Liu, Tongtong,Zhao, Shuangliang,&Han, Yongsheng.(2022).Tuning interfacial ion distribution to improve energy density of supercapacitors.NANO ENERGY,102,10.
MLA Chen, Yunyi,et al."Tuning interfacial ion distribution to improve energy density of supercapacitors".NANO ENERGY 102(2022):10.

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来源：过程工程研究所

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