| Engineering the Electrochemical Capacitive Properties of Graphene Sheets in Ionic-Liquid Electrolytes by Correct Selection of Anions | |
| Department | 清洁能源化学与材料实验室 |
Shi MJ(施敏捷)1,3; Kou SZ(寇生忠)3; Yan XB(阎兴斌)1,2 ; Yan XB(阎兴斌)
| |
| The second department | 固体润滑国家重点实验室 |
| 2014 | |
| Source Publication | ChemSusChem
 |
| ISSN | 1864-5631 |
| Volume | 7Issue:11Pages:3053-3062 |
| Abstract | Graphene sheet (GS)–ionic liquid (IL) supercapacitors are receiving intense interest because their specific energy density far exceeds that of GS–aqueous electrolytes supercapacitors. The electrochemical properties of ILs mainly depend on their diverse ions, especially anions. Therefore, identifying suitable IL electrolytes for GSs is currently one of the most important tasks. The electrochemical behavior of GSs in a series of ILs composed of 1-ethyl-3-methylimidazolium cation (EMIM+) with different anions is systematically studied. Combined with the formula derivation and building models, it is shown that the viscosity, ion size, and molecular weight of ILs affect the electrical conductivity of ILs, and thus, determine the electrochemical performances of GSs. Because the EMIM–dicyanamide IL has the lowest viscosity, ion size, and molecular weight, GSs in it exhibit the highest specific capacitance, smallest resistance, and best rate capability. In addition, because the tetrafluoroborate anion (BF4_) has the best electrochemical stability, the GS–[EMIM][BF4] supercapacitor has the widest potential window, and thus, displays the largest energy density. These results may provide valuable information for selecting appropriate ILs and designing high-performance GS–IL supercapacitors to meet different needs. |
| Keyword | Anions Graphene Ionic Liquids Reaction Mechanisms Supercapacitors |
| Subject Area | 材料科学与物理化学 |
| DOI | 10.1002/cssc.201402275 |
| Funding Organization | the Top Hundred Talents Program of the Chinese Academy of Sciences;the National Nature Science Foundations of China (21203223;21303234) |
| Indexed By | SCI |
| If | 7.657 |
| Language | 英语 |
| Funding Project | 低维材料与化学储能课题组 |
| compositor | 第一作者单位 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.licp.cn/handle/362003/7136 |
| 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.Lanzhou Univ Technol, Dept Mat Sci & Engn, State Key Lab Gansu Adv Nonferrous Met Mat, Lanzhou 730000, Peoples R China |
| Recommended Citation GB/T 7714 | Shi MJ,Kou SZ,Yan XB,et al. Engineering the Electrochemical Capacitive Properties of Graphene Sheets in Ionic-Liquid Electrolytes by Correct Selection of Anions[J]. ChemSusChem,2014,7(11):3053-3062. |
| APA | Shi MJ,Kou SZ,Yan XB,&阎兴斌.(2014).Engineering the Electrochemical Capacitive Properties of Graphene Sheets in Ionic-Liquid Electrolytes by Correct Selection of Anions.ChemSusChem,7(11),3053-3062. |
| MLA | Shi MJ,et al."Engineering the Electrochemical Capacitive Properties of Graphene Sheets in Ionic-Liquid Electrolytes by Correct Selection of Anions".ChemSusChem 7.11(2014):3053-3062. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 3053_ftp.pdf（3080KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment