期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 792, 期 -, 页码 1213-1222出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.04.022
关键词
Molten salt; SnO2 nanorods; Natural graphite; Anode material; Lithium ion battery
资金
- National Natural Science Foundations of China [51750110513, 21503033]
- National Key R&D Program of China [2017YFC0805100]
- Fundamental Research Funds for the Central Universities [N172505001, N172502003]
The fabrication of hybrid materials, such as SnO2-C, applicable in advanced energy storage systems, often suffers from lack of simplicity, scalability, cost effectiveness and/or sustainability. Therefore, the development of simpler and more efficient technologies for the sustainable production of energy materials with decent performance is highly desirable. In the current investigation, a hybrid nanostructured powder comprising of natural graphite flakes decorated with SnO2 single crystalline nanorods (NG-SnO2) was synthesized by a facile, rapid and cost effective one-step molten salt method, and characterized by a variety of techniques including X-ray diffraction, Raman spectroscopy, thermal analysis and electron microscopy. A perfect connection was identified between SnO2 nanorods and few-layers graphite on the surface of flakes. This hybrid material exhibited an excellent electrochemical performance as the anode material for Li-ion batteries, delivering a reversible capacity of 495 mAhg(-1) after 500 cycles. The few-layered graphite substrate could successfully promote the electron transfer kinetics and also buffers the mechanical stress caused by the lithiation-delithiation of perfectly attached SnO2 nanorods during the battery cycling. The molten salt process discussed here provides a cost-effective and scalable strategy for rapid preparation of the hybrid nanostructured anode material, utilizing the low cost and abundant natural graphite. (C) 2019 Elsevier B.V. All rights reserved.
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