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 Publication | Advanced Functional Materials |
ISSN | 1616-301X |
Volume | 23Issue: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. |
Keyword | Graphene Quantum Dots Mno2 Micro-supercapacitors Asymmetric Supercapacitors Rate Capability |
Subject Area | 材料科学与物理化学 |
DOI | 10.1002/adfm.201203771 |
Funding Organization | the 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 By | SCI |
If | 10.439 |
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 | |
Document Type | 期刊论文 |
Identifier | http://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 Author | Yan XB(阎兴斌) |
Affiliation | 1.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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4111_ftp.pdf(8279KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text |
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