CoO@Co and N-doped mesoporous carbon composites derived from ionic liquids as cathode catalysts for rechargeable lithium-oxygen batteries | |
Department | 绿色化学研究发展中心 |
Ni WP(倪文鹏)1,2; Liu SM(刘士民)1; Fei YQ(费玉清)1,2; He YD(何昱德)1; Ma XY(马祥元)1; Lu LJ(卢六斤)1; Deng YQ(邓友全)1; Deng YQ(邓友全) | |
The second department | 固体润滑国家重点实验室 |
2016 | |
Source Publication | Journal of Materials Chemistry A |
ISSN | 2050-7488 |
Volume | 4Issue:20Pages:7746-7753 |
Abstract | The catalytic activity of a cathode material plays a vital role in determining the electrochemical performance of Li–O2 batteries. Herein, N-doped mesoporous carbon-supported CoO@Co nanoparticles are prepared in situ using the ionic liquid (IL) 1-butyl-3-methylimidazolium tetrachlorocobalt ([BMIm]2[CoCl4]) as the precursor with silica as the hard template. The material was characterized by TGA, BET, XRD, TEM, XPS, and H2-TPR. After exposure to air, the species on the surface of the Co is CoO, as verified by XPS. The pore size is about 2 nm, and the CoO@Co nanoparticles were irregularly shaped and sized in the range of 20–300 nm, which may have been due to the aggregation of ultrafine nanoparticles. The existence of an interaction between the CoO@Co nanoparticles and the N-doped support is confirmed by XPS and H2-TPR. The catalyst shows superior activity for oxygen evolution reaction (OER) manifested in its lower charge potential (3.75 V at the current density of 100 mA g−1). Enhanced performances in coulombic efficiency, rate capability, and cycling stability (55 cycles) are also realized. Finally, these improvements, with the exception of the catalytic activity of CoO, may benefit from the interaction between the carbon supporter and the CoO@Co nanoparticles. |
Subject Area | 物理化学与绿色催化 |
DOI | 10.1039/c6ta01222a |
Funding Organization | the National Natural Science Foundation of China (NO. 21403259;21373247) |
Indexed By | SCI |
If | 8.867 |
Language | 英语 |
Funding Project | 绿色催化课题组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/20104 |
Collection | 绿色化学研究发展中心 固体润滑国家重点实验室(LSL) |
Corresponding Author | Deng YQ(邓友全) |
Affiliation | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, Ctr Green Chem & Catalysis, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China |
Recommended Citation GB/T 7714 | Ni WP,Liu SM,Fei YQ,et al. CoO@Co and N-doped mesoporous carbon composites derived from ionic liquids as cathode catalysts for rechargeable lithium-oxygen batteries[J]. Journal of Materials Chemistry A,2016,4(20):7746-7753. |
APA | Ni WP.,Liu SM.,Fei YQ.,He YD.,Ma XY.,...&邓友全.(2016).CoO@Co and N-doped mesoporous carbon composites derived from ionic liquids as cathode catalysts for rechargeable lithium-oxygen batteries.Journal of Materials Chemistry A,4(20),7746-7753. |
MLA | Ni WP,et al."CoO@Co and N-doped mesoporous carbon composites derived from ionic liquids as cathode catalysts for rechargeable lithium-oxygen batteries".Journal of Materials Chemistry A 4.20(2016):7746-7753. |
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