Engineering the Electrochemical Capacitive Properties of Graphene Sheets in Ionic-Liquid Electrolytes by Correct Selection of Anions
文献类型：期刊论文
| 作者 | Shi MJ(施敏捷)1,3; Kou SZ(寇生忠)3; Yan XB(阎兴斌)1,2
|
| 刊名 | ChemSusChem
 |
| 出版日期 | 2014 |
| 卷号 | 7期号:11页码:3053-3062 |
| 关键词 | anions graphene ionic liquids reaction mechanisms supercapacitors |
| ISSN号 | 1864-5631 |
| 通讯作者 | 阎兴斌 |
| 英文摘要 | 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. |
| 学科主题 | 材料科学与物理化学 |
| 收录类别 | SCI |
| 资助信息 | the Top Hundred Talents Program of the Chinese Academy of Sciences;the National Nature Science Foundations of China (21203223;21303234) |
| 语种 | 英语 |
| WOS记录号 | WOS:000344538400011 |
| 公开日期 | 2015-02-05 |
| 源URL | [http://210.77.64.217/handle/362003/7136]  |
| 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 |
| 作者单位 | 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 |
| 推荐引用方式 GB/T 7714 | Shi MJ,Kou SZ,Yan XB. 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.(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. |
入库方式： OAI收割
来源：兰州化学物理研究所
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