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Preparation and electrochemical performance of highly dispersed Sn-Zn-O composite system

机译：高分散Sn-Zn-O复合体系的制备及电化学性能

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摘要

A novel nanosized Sn-Zn-O composite system as anode materials in lithium ion batteries has been prepared by partial solid-state reduction. The composites were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDS) techniques, and the performance of the electrode was investigated. The Sn-Zn-O electrode was found to have a gravimetric charge capacity of 640mAh g~(-1), which is twice larger than that of graphite electrode. Although the Sn-Zn-O electrode exhibited poor cycle life, the performance could be improved significantly if the Sn-Zn-O was sintered at 800 ℃, which showed a larger reversible capacity of 771 mAh g~(-1) and a better performance on the reversibility at the first cycle.
机译：通过部分固态还原制备了一种新型的纳米级Sn-Zn-O复合体系作为锂离子电池负极材料。通过X射线衍射（XRD），X射线光电子能谱（XPS），扫描电子显微镜（SEM）和能量色散X射线能谱（EDS）技术对复合材料进行了表征，并对电极的性能进行了研究。发现Sn-Zn-O电极的重量充电容量为640mAh g〜（-1），是石墨电极的两倍。尽管Sn-Zn-O电极的循环寿命较差，但是如果在800℃下烧结Sn-Zn-O电极，则性能可以得到显着改善，这表明可逆容量更大，为771 mAh g〜（-1），并且具有更好的可逆容量。第一个周期的可逆性性能。

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