Si-TiN alloy Li-ion battery negative electrode materials made by N2 gas milling
Si-TiN alloy Li-ion battery negative electrode materials made by N2 gas milling
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N2气铣制备Si-TiN合金锂离子电池负极材料
DOI：
10.1557/mrc.2018.178
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发表时间：
2018
影响因子：
1.9
通讯作者：
M. Obrovac
中科院分区：
文献类型：
--
作者：
Y. Wang;Simeng Cao;Hui Liu;Min Zhu;M. Obrovac
由于TiN的高导电性、低电解质反应性和热稳定性，Si-TiN合金对于用作Li离子电池中的负电极是有吸引力的。在这里，它表明，具有高Si含量的Si-TiN合金可以令人惊讶地通过简单地球磨Si和Ti粉末在N2（g）中，一个反应没有预测的热力学。这提供了一种低成本和简单的方法来合成这些有吸引力的材料。所得合金具有比直接球磨Si和TiN制成的Si-TiN更小的晶粒尺寸，赋予它们高热稳定性和改善的Li电池中的循环特性。
Si-TiN alloys are attractive for use as negative electrodes in Li-ion cells because of the high conductivity, low electrolyte reactivity, and thermal stability of TiN. Here it is shown that Si-TiN alloys with high Si content can surprisingly be made by simply ball milling Si and Ti powders in N2(g); a reaction not predicted by thermodynamics. This offers a low-cost and simple method of synthesizing these attractive materials. The resulting alloys have smaller grain sizes than Si-TiN made by ball milling Si and TiN directly, giving them high thermal stability and improved cycling characteristics in Li cells.