LICP OpenIR  > 清洁能源化学与材料实验室
Superior Micro-Supercapacitors Based on Graphene Quantum Dots
Department清洁能源化学与材料实验室
Liu WW(刘文文)1,2,3; Feng YQ(冯亚强)1; Yan XB(阎兴斌)1,2; Chen JT(陈江涛)1; Xue QJ(薛群基)2; Yan XB(阎兴斌)
The second department固体润滑国家重点实验室
2013
Source PublicationAdvanced Functional Materials
ISSN1616-301X
Volume23Issue:33Pages:4111-4122
Abstract

Graphene quantum dots (GQDs) have attracted tremendous research interest due to the unique properties associated with both graphene and quantum dots. Here, a new application of GQDs as ideal electrode materials for supercapacitors is reported. To this end, a GQDs//GQDs symmetric microsupercapacitor is prepared using a simple electro-deposition approach, and its electrochemical properties in aqueous electrolyte and ionic liquid electrolyte are systematically investigated. The results show that the as-made GQDs micro-supercapacitor has superior rate capability up to 1000 V s-1, excellent power response with very short relaxation time constant (t0 = 103.6 μs in aqueous electrolyte and t0 = 53.8 μs in ionic liquid electrolyte), and excellent cycle stability. Additionally, another GQDs//MnO2 asymmetric supercapacitor is also built using MnO2 nanoneedles as the positive electrode and GQDs as the negative electrode in aqueous electrolyte. Its specifi c capacitance and energy density are both two times higher than those of GQDs//GQDs symmetric micro-supercapacitor in the same electrolyte. The results presented here may pave the way for a new promising application of GQDs in micropower suppliers and microenergy storage devices.

KeywordGraphene Quantum Dots Mno2 Micro-supercapacitors Asymmetric Supercapacitors Rate Capability
Subject Area材料科学与物理化学
DOI10.1002/adfm.201203771
Funding Organizationthe Top Hundred Talents Program of the Chinese Academy of Sciences;the National Nature Science Foundations of China (51005225);the Youth Science Foundations of Gansu Province (1107RJYA274)
Indexed BySCI
If10.439
Language英语
Funding Project低维材料与化学储能课题组;低维材料摩擦学组
compositor第一作者单位
Citation statistics
Cited Times:579[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.licp.cn/handle/362003/4646
Collection清洁能源化学与材料实验室
固体润滑国家重点实验室(LSL)
Corresponding AuthorYan XB(阎兴斌)
Affiliation1.Chinese Acad Sci, Lanzhou Inst Chem Phys, Lab Clean Energy Chem & Mat, Lanzhou 730000, Peoples R China
2.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Liu WW,Feng YQ,Yan XB,et al. Superior Micro-Supercapacitors Based on Graphene Quantum Dots[J]. Advanced Functional Materials,2013,23(33):4111-4122.
APA Liu WW,Feng YQ,Yan XB,Chen JT,Xue QJ,&阎兴斌.(2013).Superior Micro-Supercapacitors Based on Graphene Quantum Dots.Advanced Functional Materials,23(33),4111-4122.
MLA Liu WW,et al."Superior Micro-Supercapacitors Based on Graphene Quantum Dots".Advanced Functional Materials 23.33(2013):4111-4122.
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