期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 710, 期 -, 页码 575-580出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.03.314
关键词
MnO nanorods; Carbon coating; Metal-organic frameworks; Sodium-ion batteries; Long-life cycling
资金
- Basic Research Project of Shanghai Science and Technology Committee [14JC1491000]
- Research Team of Anhui Provincial Education Department [2016SCXPTTD]
- Key Project of National Natural Science Foundation of China [61231003]
Porous MnO@C nanorods were synthesized simply by annealing Mn-based metal-organic frameworks precursor. The morphology, structure and electrochemical performance of MnO@C hybrid were characterized by scanning electron microscopy, nitrogen adsorption/desorption isotherms, galvanostatic charge/discharge tests, cyclic voltammetry and electrochemical impendence spectroscopy. When used as anode material for sodium-ion batteries, the MnO@C hybrid exhibits a high reversible specific capacity of 260 mAh g(-1) after 100 cycles at a current density of 50 mA g(-1). When the current density is increased to 2 A g(-1), the MnO@C delivers a superior long-life cycling performance with a capacity of 140 mAh g(-1) at very high current density of 2 A g(-1). The excellent electrochemical performance of MnO@C can be attributed to its unique porous structure with MnO nanoparticles embedded in carbon matrix, which can apparently increase the electrical conductivity and buffer the volume change during the charge/discharge process. (C) 2017 Elsevier B.V. All rights reserved.
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