Engineering the Electrochemical Capacitive Properties of Microsupercapacitors Based on Graphene Quantum Dots/MnO2 Using Ionic Liquid Gel Electrolytes

CORC > 兰州化学物理研究所 > 中国科学院兰州化学物理研究所 > 清洁能源化学与材料实验室

	Engineering the Electrochemical Capacitive Properties of Microsupercapacitors Based on Graphene Quantum Dots/MnO2 Using Ionic Liquid Gel Electrolytes
	Shen BS(申保收)1,2 ; Lang JW(郎俊伟)1; Guo RS(郭瑞生)1 ; Zhang X(张旭)1; Yan XB(阎兴斌)1 ; Yan XB(阎兴斌)
刊名	ACS Applied Materials and Interfaces
	2015
卷号	7 期号:45 页码:25378-25389
关键词	microsupercapacitors graphene quantum dots ionic liquid gel rate capability ac line-filters mechanism
ISSN号	1944-8244
通讯作者	阎兴斌
英文摘要	All-solid-state microsupercapacitors (MSCs) have been receiving intense interest due to their potential as micro/nanoscale energy storage devices, but their low energy density has limited practical applications. It has been reported that gel electrolytes based on ionic liquids (ionogels) with large potential windows can be used as solid electrolytes to enhance the energy density of MSCs, but a systematic study on how to select and evaluate such ionogels for MSCs is rare. In this study, we construct a series of all-solid-state asymmetric MSCs on the interdigital finger electrodes, using graphene quantum dots (GQDs) as the negat(i)ve electrode, MnO₂ nanosheets as the positive electrode, and different ionogels as the solid electrolytes. Among them, the MSC using 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIM][NTF2]) with 4 wt % fumed SiO₂ ionogel exhibited the best electrochemical performance, having excellent rate capability with the scan rate up to 2000 V s^-1, ultrafast frequency response (tau(0) = 206.9 mu s) and high energy density. The outstanding performance of this device mainly results from fast ion diffusion, high ion conductivity of the ionogel, and ionic liquid-matrix interactions. The results presented here provide guidance for picking out appropriate ionogels for use in high-performance all-solid-state MSCs to meet the growing requirement of micronanoscale energy storage devices. Additionally, the ultrafast frequency response of our MSCs suggests potential applications in ac line-filters.
学科主题	材料科学与物理化学
收录类别	SCI
资助信息	National Natural Science Foundation of China (21573265;51501208;21203223)
语种	英语
WOS记录号	WOS:000365148600048
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/18821]
专题	兰州化学物理研究所_清洁能源化学与材料实验室兰州化学物理研究所_固体润滑国家重点实验室
通讯作者	Yan XB(阎兴斌)
作者单位	1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lab Clean Energy Chem & Mat, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Shen BS,Lang JW,Guo RS,et al. Engineering the Electrochemical Capacitive Properties of Microsupercapacitors Based on Graphene Quantum Dots/MnO2 Using Ionic Liquid Gel Electrolytes[J]. ACS Applied Materials and Interfaces,2015,7(45):25378-25389.
APA	Shen BS,Lang JW,Guo RS,Zhang X,Yan XB,&阎兴斌.(2015).Engineering the Electrochemical Capacitive Properties of Microsupercapacitors Based on Graphene Quantum Dots/MnO2 Using Ionic Liquid Gel Electrolytes.ACS Applied Materials and Interfaces,7(45),25378-25389.
MLA	Shen BS,et al."Engineering the Electrochemical Capacitive Properties of Microsupercapacitors Based on Graphene Quantum Dots/MnO2 Using Ionic Liquid Gel Electrolytes".ACS Applied Materials and Interfaces 7.45(2015):25378-25389.