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Ionophobic nanopores enhancing the capacitance and charging dynamics in supercapacitors with ionic liquids

文献类型：期刊论文

作者Gan, Zhongdong2,5; Wang, Yanlei1,2,3; Wang, Mi2,3; Gao, Enlai4; Huo, Feng2,3; Ding, Weilu2,3; He, Hongyan1,2,3; Zhang, Suojiang2,3,5
刊名JOURNAL OF MATERIALS CHEMISTRY A
出版日期2021-05-08
页码8
ISSN号2050-7488
DOI10.1039/d1ta01818c
英文摘要Nano-porous electrodes combined with ionic liquids (ILs) are widely favored to promote the energy density of supercapacitors. However, this is always accompanied by the reduced power density, especially considering the high viscosity and large steric hindrance of ILs. Here, we use computational simulations coupled with the equivalent circuit model to quantify the charging process and overall performance of the IL-based supercapacitor. We find that the ions in the electrode with ionophobic pores display a new charging mechanism under a threshold potential, namely co-ion adsorption, which has been ignored before. This identified abnormal charging process can not only efficiently enhance the differential capacitance but also remarkably speed up the charging dynamics. Meanwhile, the pores with various sizes and lengths in the electrode demonstrate the same tendency, reflecting the relative universality of the collaborative enhancement of the co-ion adsorption process. Furthermore, the quantitative relation between charging time/capacitance and electric voltage/ionophobic properties is further obtained to evaluate the critical conditions for synergistically improving the energy density and power density of supercapacitors. These findings may advance the understanding of charging mechanisms in porous electrodes and manifest that the ionophobicity is one important factor in the rational design of supercapacitors with ILs or other electrochemical devices in the field of chemical engineering.
WOS关键词ELECTRICAL DOUBLE-LAYER ; ENERGY-STORAGE ; DIFFERENTIAL CAPACITANCE ; INTERFACIAL STRUCTURE ; MOLECULAR INSIGHTS ; PORE-SIZE ; GRAPHENE ; NMR ; SIMULATION ; BEHAVIOR
资助项目National Natural Science Foundation of China[21922813] ; National Natural Science Foundation of China[22078322] ; National Natural Science Foundation of China[21890762] ; National Natural Science Foundation of China[21776278] ; Innovation Academy for Green Manufacture, Chinese Academy of Sciences[IAGM2020C16] ; Youth Innovation Promotion Association of CAS[2017066] ; Youth Innovation Promotion Association of CAS[2021046]
WOS研究方向Chemistry ; Energy & Fuels ; Materials Science
语种英语
WOS记录号WOS:000655652300001
出版者ROYAL SOC CHEMISTRY
资助机构National Natural Science Foundation of China ; Innovation Academy for Green Manufacture, Chinese Academy of Sciences ; Youth Innovation Promotion Association of CAS
源URL[http://ir.ipe.ac.cn/handle/122111/48917]  
专题中国科学院过程工程研究所
通讯作者Wang, Yanlei; He, Hongyan; Zhang, Suojiang
作者单位1.Chinese Acad Sci, Innovat Acad Green Manufacture, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Beijing Key Lab Ion Liquids Clean Proc, State Key Lab Multiphase Complex Syst, CAS Key Lab Green Proc & Engn,Inst Proc Engn, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Wuhan Univ, Sch Civil Engn, Dept Engn Mech, Wuhan 430072, Hubei, Peoples R China
5.Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China
推荐引用方式
GB/T 7714		 Gan, Zhongdong,Wang, Yanlei,Wang, Mi,et al. Ionophobic nanopores enhancing the capacitance and charging dynamics in supercapacitors with ionic liquids[J]. JOURNAL OF MATERIALS CHEMISTRY A,2021:8.
APA Gan, Zhongdong.,Wang, Yanlei.,Wang, Mi.,Gao, Enlai.,Huo, Feng.,...&Zhang, Suojiang.(2021).Ionophobic nanopores enhancing the capacitance and charging dynamics in supercapacitors with ionic liquids.JOURNAL OF MATERIALS CHEMISTRY A,8.
MLA Gan, Zhongdong,et al."Ionophobic nanopores enhancing the capacitance and charging dynamics in supercapacitors with ionic liquids".JOURNAL OF MATERIALS CHEMISTRY A (2021):8.

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来源：过程工程研究所

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