Controllable synthesis of Mn3O4 nanodots@nitrogen-doped graphene and its application for high energy density supercapacitors | |
Department | 清洁能源化学与材料实验室 |
Liu L(刘莉)1,3; Su LJ(苏利军)1,3; Lang JW(郎俊伟)1; Hu B(胡斌)2; Xu S(许珊)2; Yan XB(阎兴斌)1; Yan XB(阎兴斌); Xu S(许珊) | |
The second department | 固体润滑国家重点实验室;osso国家重点实验室 |
2017 | |
Source Publication | Journal of Materials Chemistry A |
ISSN | 2050-7488 |
Volume | 5Issue:11Pages:5523-5531 |
Abstract | Supercapacitors using ionic liquids (ILs) as electrolytes have triggered great interest due to their much higher energy density when compared to aqueous supercapacitors. Although manganese oxides have obvious capacitive contribution in ILs and thus can be used as electrode materials for IL-based supercapacitors, they suffer from low specific capacitance in ILs. Here Mn3O4 nanodots loaded on nitrogen-doped graphene sheets (denoted as Mn3O4 NDs@NG) are prepared through a facile one-pot solvothermal method with the presence of octylamine as the surfactant. Octylamine plays an important role in obtaining quantum-sized Mn3O4 NDs and controlling their dispersion degree on the surface of NG. With an optimal loading mass of Mn3O4 NDs, the corresponding Mn3O4 NDs@NG material is able to achieve a high specific capacitance of 158.9 F g−1 in a given IL and shows excellent rate capability. On this basis, a symmetric supercapacitor is assembled based on such a Mn3O4 NDs@NG, which delivers a high energy density of 90.7 W h kg−1 in the IL electrolyte. Furthermore, an asymmetric supercapacitor is also built by using such a Mn3O4 NDs@NG and activated carbon as the negative and positive electrode, respectively. This asymmetric device shows a higher energy density of 124.4 W h kg−1 compared to the symmetric one, and it still can deliver 55.8 W h kg−1 at a large power density of 29.9 kW kg−1. |
Subject Area | 材料科学与物理化学 |
DOI | 10.1039/c7ta00744b |
Funding Organization | the National Natural Science Foundation of China (21573265;21673263) |
Indexed By | SCI |
If | 8.867 |
Language | 英语 |
Funding Project | 低维材料与化学储能研究组;羰基金属功能材料研究组;多相催化—2研究组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/21632 |
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) 羰基合成与选择氧化国家重点实验室(OSSO) |
Corresponding Author | Yan XB(阎兴斌); Xu S(许珊) |
Affiliation | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lab Clean Energy Chem & Mat, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100080, Peoples R China |
Recommended Citation GB/T 7714 | Liu L,Su LJ,Lang JW,et al. Controllable synthesis of Mn3O4 nanodots@nitrogen-doped graphene and its application for high energy density supercapacitors[J]. Journal of Materials Chemistry A,2017,5(11):5523-5531. |
APA | Liu L.,Su LJ.,Lang JW.,Hu B.,Xu S.,...&许珊.(2017).Controllable synthesis of Mn3O4 nanodots@nitrogen-doped graphene and its application for high energy density supercapacitors.Journal of Materials Chemistry A,5(11),5523-5531. |
MLA | Liu L,et al."Controllable synthesis of Mn3O4 nanodots@nitrogen-doped graphene and its application for high energy density supercapacitors".Journal of Materials Chemistry A 5.11(2017):5523-5531. |
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