Investigation of CrSi2 and MoSi2 as anode materials for lithium-ion batteries
Investigation of CrSi2 and MoSi2 as anode materials for lithium-ion batteries
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DOI：
10.1016/j.jpowsour.2011.11.047
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发表时间：
2012-03-15
影响因子：
9.2
通讯作者：
Davidson, Isobel J.
中科院分区：
文献类型：
--
作者：
Courtel, Fabrice M.;Duguay, Dominique;Davidson, Isobel J.
我们报告了两种金属硅化物MoSi 2和CrSi 2作为锂离子电池负极材料的适用性。这两种材料是通过高能球磨相应的金属和X-射线衍射合成的，用于跟踪晶相的演变/形成。内部制备的粉末显示出比商业粉末（原样或球磨）更好的电池性能。我们观察到，20小时是必要的形成MoSi 2，而100小时是必要的形成CrSi 2粉末。最好的电池性能，得到了与合成的CrSi 2粉末，具有469 mAh g（-1）的理论容量值。这种粉末提供340、262、167、110的容量。在C/12、C/6、C/2、C和2C下分别为58 mAh g（-1）。在60摄氏度下循环显示出更高的容量值，但这些值的衰减更快。皇冠版权所有（C）2011由Elsevier B. V.出版。保留所有权利。
We report on the suitability of the two metal silicides MoSi2 and CrSi2 as anode materials for Li-ion batteries. The two materials were synthesized by high energy ball milling of the corresponding metals and X-ray diffraction was used to follow the evolution/formation of the crystalline phases. The in-house prepared powders have shown better battery performance than commercial powders (as-received or ball-milled). We observed that 20 h were necessary for the formation of MoSi2 whereas 100 h were needed for the formation of the CrSi2 powder. The best battery performance was obtained with the synthesized CrSi2 powder that has a theoretical capacity value of 469 mAh g(-1). This powder provided capacities of 340, 262, 167, 110. and 58 mAh g(-1) at C/12, C/6, C/2, C, and 2C, respectively. Cycling at 60 degrees C showed higher capacity values, but with a faster fade of these values. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.