Identifying pseudocapacitance of Fe2O3 in an ionic liquid and its application in asymmetric supercapacitors | |
Department | 清洁能源化学与材料实验室 |
Sun SX(孙世雄)1,3; Lang JW(郎俊伟)1; Wang RT(王儒涛)1; Kong LB(孔令斌)3; Li XC(李小成)1; Yan XB(阎兴斌)1,2; Yan XB(阎兴斌); Kong LB(孔令斌) | |
The second department | 固体润滑国家重点实验室 |
2014 | |
Source Publication | Journal of Materials Chemistry A |
ISSN | 2050-7488 |
Volume | 2Issue:35Pages:14550-14556 |
Abstract | Pseudocapacitance is commonly associated with surface or near-surface reversible redox reactions, as observed with transition metal oxides in alkaline aqueous electrolytes. Here, we demonstrate that pseudocapacitive behavior of Fe2O3 can occur in a 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIMBF4) ionic liquid (IL), and it is closely related to the chemical state variation between Fe3+ and Fe2+ on the surface of a Fe2O3 electrode during the charging/discharging process. By taking advantage of such pseudocapacitance, we prepared a promising electrode material, i.e., graphene nanosheetsupported Fe2O3 nanoparticles (denoted as Fe2O3@GNS), and then built high-performance asymmetric supercapacitors (ASs) using Fe2O3@GNS as the battery-type electrode material, commercial activated carbon (AC)/or activated polyaniline-derived carbon nanorods (denoted as APDC) as the capacitor-type electrode material, and EMIMBF4 IL as the electrolyte. The as-made ASs are able to work reversibly in a full operation voltage region of 0–4 V and exhibit very high energy density. Especially, the AS of Fe2O3@GNS//APDC achieves an extremely high energy density of 177 W h kg_1 and shows a superior combination of high energy and power density (the energy density still remains 62.4 W h kg_1 even at a high power density of 8 kW kg_1). |
Subject Area | 材料科学与物理化学 |
DOI | 10.1039/c4ta02026j |
Funding Organization | the Top Hundred Talents Program of Chinese Academy of Sciences;the National Nature Science Foundations of China (21203223;21303234) |
Indexed By | SCI |
If | 7.443 |
Language | 英语 |
Funding Project | 低维材料与化学储能课题组;新型电池材料研究组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/7131 |
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); Kong LB(孔令斌) |
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, Lanzhou 730050, Peoples R China |
Recommended Citation GB/T 7714 | Sun SX,Lang JW,Wang RT,et al. Identifying pseudocapacitance of Fe2O3 in an ionic liquid and its application in asymmetric supercapacitors[J]. Journal of Materials Chemistry A,2014,2(35):14550-14556. |
APA | Sun SX.,Lang JW.,Wang RT.,Kong LB.,Li XC.,...&孔令斌.(2014).Identifying pseudocapacitance of Fe2O3 in an ionic liquid and its application in asymmetric supercapacitors.Journal of Materials Chemistry A,2(35),14550-14556. |
MLA | Sun SX,et al."Identifying pseudocapacitance of Fe2O3 in an ionic liquid and its application in asymmetric supercapacitors".Journal of Materials Chemistry A 2.35(2014):14550-14556. |
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