期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 163, 期 8, 页码 A1627-A1632出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.0841608jes
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资金
- State Key Laboratory of Pulsed Power Laser Technology of China in Electronic Engineering Institute, Hefei [SKL 2015 KF 04]
- National Natural Science Foundation of China [61076040]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [2012011111006]
Highly ordered MoSe2 nanospheres are successfully fabricated via a facile colloidal route. The unique as-obtained MoSe2 nanospheres render the high-rate transporation of sodium ion due to small size and high specific surface area. As the anode, MoSe2 nanospheres yield the initial discharge/charge capacities of 520/430 mAh g(-1) for potentials ranging from 0.1 to 3 V at a current rate of 0.1 C with an 80% capacity retention over 200 cycles. In addition, MoSe2 nanospheres also demonstrate excellent electrochemical performance at high current densities. Using first-principles simulation, the activation barriers for sodium ion transportation on the surface as well as interlayer of the MoSe2 are 0.344/1.31 eV respectively, suggesting that high specific surface area MoSe2 nanospheres can serve as an attractive anode material for Na ion batteries. (C) 2016 The Electrochemical Society. All rights reserved.
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