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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Reactive molten salt synthesis of natural graphite flakes decorated with SnO2 nanorods as high performance, low cost anode material for lithium ion batteries
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Reactive molten salt synthesis of natural graphite flakes decorated with SnO2 nanorods as high performance, low cost anode material for lithium ion batteries

机译：具有SnO2纳米棒作为高性能，低成本阳极材料装饰的天然石墨薄片的反应性熔融合成，用于锂离子电池的低成本阳极材料

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摘要

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.
机译：混合材料的制造，例如SnO2-C，适用于先进的能量存储系统，通常存在缺乏简单性，可扩展性，成本效益和/或可持续性。因此，对于具有体面性能的可持续生产的更简单和更有效的技术的发展是非常理想的。在本前研究中，通过容易，快速和成本有效的一步熔融盐法合成包含由SnO2单晶纳米棒（Ng-SnO2）装饰的天然石墨薄膜的杂化纳米结构粉末，并通过包括的各种技术X射线衍射，拉曼光谱，热分析和电子显微镜。在薄片表面上的SnO2纳米棒和几层石墨之间鉴定了完美的连接。该杂化材料表现出优异的电化学性能作为锂离子电池的阳极材料，在500次循环后输送495mAhg（-1）的可逆容量。少数层石墨衬底可以成功地促进电子转移动力学，并且还可以在电池循环期间缓冲由完美连接的SnO2纳米棒的锂化锂电层引起的机械应力。这里讨论的熔融盐方法提供了一种具有成本效益和可扩展的策略，用于快速制备杂化纳米结构阳极材料，利用低成本和丰富的天然石墨。 （c）2019 Elsevier B.v.保留所有权利。

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