期刊
ENERGY STORAGE MATERIALS
卷 16, 期 -, 页码 400-410出版社
ELSEVIER
DOI: 10.1016/j.ensm.2018.06.018
关键词
BaNb3.6O10; Nanowires; Electrospinning; Lithium-ion batteries; In-situ observation
资金
- National Natural Science Foundation of China [U1632114]
- Ningbo Key Innovation Team [2014B81005]
- K.C. Wong Magna Fund in Ningbo University
High-performance anode materials for development of long cycling life and environmental benignity lithium-ion batteries (LIBs) are greatly desired. Here, the nanostructure, electrochemical performance and structural evolution of barium niobates in LIBs are reported of the first time. One-dimensional barium niobium oxide (BaNb3.6O10) nanowires are prepared by electrospinning technique, displaying the nanoparticle-in-nanowire morphology. The BaNb3.6O10 nanowires show high structural stability, high reversible specific capacity (263.8 mAh g(-1) at 100 mA g(-1)), superior rate performance and long-term cycling capability (keeping 60% of the initial reversible capacity at a high current density of 1000 mA g(-1) after 5000 cycles). In addition, the mechanism for lithium storage in BaNb3.6O10 is also studied by using ex-situ transmission electron microscopy (TEM), in-situ X-ray diffraction (XRD), in-situ TEM and theory calculations. The results show that BaNb3.6O10 nanowires have reversibility and structural stability for the lithiation and delithiation process. The fabricated BaNb3.6O10/LiMn2O4 full cell demonstrates a practical energy density of 270Wh Kg(-1). This work perfectly confirms that the one-dimensional BaNb3.6O10 nanowires are an ideal material for LIBs.
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