Reaction Behavior of a Silicide Electrode with Lithium in an Ionic-Liquid Electrolyte
Reaction Behavior of a Silicide Electrode with Lithium in an Ionic-Liquid Electrolyte
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DOI：
10.1021/acsomega.0c03357
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发表时间：
2020-09-08
期刊：
影响因子：
4.1
通讯作者：
Sakaguchi, Hiroki
中科院分区：
文献类型：
--
作者：
Domi, Yasuhiro;Usui, Hiroyuki;Sakaguchi, Hiroki
硅化物是一种极具吸引力的新型活性材料，可用于使用某些离子液体电解液的下一代锂离子电池的负极，但上述组合的反应机理尚不清楚。在硅化物电极上可能发生的反应如下：锂金属在电极上的沉积和溶解，硅的锂化和脱氢，硅化物的相分离，以及硅化物与锂的合金化和脱合金化。在这里，我们使用各种分析方法研究了这些可能性。结果表明，硅化物发生了锂化和脱硫化反应。
Silicides are attractive novel active materials for use in the negative-electrodes of next-generation lithium-ion batteries that use certain ionic-liquid electrolytes; however, the reaction mechanism of the above combination is yet to be clarified. Possible reactions at the silicide electrode are as follows: deposition and dissolution of Li metal on the electrode, lithiation and delithiation of Si, which would result from the phase separation of the silicide, and alloying and dealloying of the silicide with Li. Herein, we examined these possibilities using various analysis methods. The results revealed that the lithiation and delithiation of silicide occurred.