期刊
JOURNAL OF POWER SOURCES
卷 328, 期 -, 页码 241-249出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2016.08.016
关键词
Sodium vanadates; Ab-initio calculation; Cathode; Lithium batteries; Sodium batteries
资金
- National High Technology Research and Development Program of China (863 Program) [2013AA110106]
- National Natural Science Foundation of China [51374255, 51572299]
- Fundamental Research Funds for the Central Universities of Central South University [2015zzts174]
Na0.282V2O5 nanorods have been successfully prepared using a facile hydrothermal reaction followed by a calcination treatment, which is then used as a cathode for lithium batteries and sodium batteries for the first time. The crystal structure is refined to be a monoclinic lattice, which contains 3D tunnels along the b-axis. The Na ions are located inside the tunnels and form pillar effect to prevent the collapse of the crystal structure. As cathode material for lithium batteries, the Na0.282V2O5 nanorods deliver a high discharge specific capacity of 264,186,191 and 149 mA h g(-1) at the current density of 50, 500,1000 and 1500 mA g(-1), respectively. The Na0.282V2O5 nanorods demonstrate the excellent cycling performance up to 400 cycles at 1 and 1.5 A g(-1). Importantly, as cathode material for sodium batteries, Na0.282V2O5 exhibits superior long-term cyclic stability up to 1000 cycles at 0.3 A g(-1). The results of ex-situ XRD, EIS and first-principle calculation indicate that the Na0.282V2O5 possesses good electrical conductivity and structural stability. Our work demonstrates that the Na0.282V2O5 material could be considered as a potential cathode for lithium-ion batteries, and even sodium ion batteries. (C) 2016 Elsevier B.V. All rights reserved.
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