期刊
RARE METALS
卷 37, 期 2, 页码 118-122出版社
NONFERROUS METALS SOC CHINA
DOI: 10.1007/s12598-014-0423-z
关键词
Niobium oxide; Anode; Electrochemical properties; Lithium-ion batteries
资金
- National Science and Technology Support Project of China [2007BAE12B01]
- Science and Technology Project of Changsha [k1201039-11]
The NbO electrode materials were successfully synthesized by high-temperature solid-phase method using Nb powders and Nb2O5 powders as raw materials. The crystalline structure, morphology, and electrochemical properties of the obtained materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), dynamic light scattering instrument (DLSA), half-cell charge-discharge tests, and cyclic voltammetry (CV). The reaction mechanism of lithium with NbO was investigated by ex-situ XRD studies. The results show that material average Li storage voltage is nearly located at 1.6 V, and the lithium intercalation into NbO remains a single-phase process. For the first discharge, a capacity of 355 mAh.g(-1) is obtained at a current rate of 0.1C, and 293 mAh.g(-1) is maintained after 50 cycles, whereas a capacity of 416 mAh.g(-1) is obtained at a current rate of 0.1C after ball milling. And 380 mAh.g(-1) reversible capacity remains for the ball milling sample.
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