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

doi:10.1039/d1ta01818c

	Ionophobic nanopores enhancing the capacitance and charging dynamics in supercapacitors with ionic liquids
	Gan, Zhongdong 2,5; Wang, Yanlei 2,3,4; Wang, Mi 2,3; Gao, Enlai 1; Huo, Feng 2,3; Ding, Weilu 2,3; He, Hongyan 2,3,4; Zhang, Suojiang 2,3,5
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2021-05-08
页码	8
ISSN号	2050-7488
DOI	10.1039/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.
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关键词	ELECTRICAL DOUBLE-LAYER ; ENERGY-STORAGE ; DIFFERENTIAL CAPACITANCE ; INTERFACIAL STRUCTURE ; MOLECULAR INSIGHTS ; PORE-SIZE ; GRAPHENE ; NMR ; SIMULATION ; BEHAVIOR
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000655652300001
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
内容类型	期刊论文
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.Wuhan Univ, Sch Civil Engn, Dept Engn Mech, Wuhan 430072, Hubei, 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.Chinese Acad Sci, Innovat Acad Green Manufacture, Beijing 100190, 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.