Controlling surface morphology of Sn thin-film to enhance cycling performance in lithium ion batteries
Controlling surface morphology of Sn thin-film to enhance cycling performance in lithium ion batteries
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DOI：
10.1016/j.materresbull.2016.11.041
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发表时间：
2017-03
影响因子：
5.4
通讯作者：
Yuan Li;Ryo Matsuura;M. Saka
中科院分区：
文献类型：
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作者：
Yuan Li;Ryo Matsuura;M. Saka
锡基材料作为锂离子电池负极材料，具有很高的储锂容量，引起了人们的广泛关注。然而，由于在充电/放电循环期间重复的体积膨胀/收缩而导致的循环性能差限制了Sn基材料的实际应用。在这里，提出了一种简单的技术，通过调节溅射条件来控制Sn薄膜的表面形貌，以提高LIB的循环性能。首先，系统地研究了溅射条件对Sn薄膜表面形貌的影响。其次，这些锡薄膜的循环性能的变化进行了评估。最后，提出在Sn薄膜阳极和Cu箔集流体之间插入Cu缓冲层以引起颗粒细化，从而提高循环性能。这一概念可以推广到硅阳极，并进一步与其他方法相结合，以有效地提高薄膜阳极的循环性能的LIB。
With a high Li storage capacity, Sn-based materials have attracted great attention as a prospective anode material for lithium ion batteries (LIBs). However, the poor cycling performance due to repetitive volume expansion/contraction during charge/discharge cycles has restricted the practical application of Sn-based materials. Here, a simple technique of controlling the surface morphology of Sn thin-film by modulating sputtering conditions was proposed to enhance the cycling performance of LIBs. Firstly, the dependence of surface morphology of Sn thin-film on sputtering conditions was systematically investigated. Secondly, variations in the cycling performance of these Sn thin-films were evaluated. Finally, insertion of Cu buffer between the Sn thin-film anode and the Cu foil current collector was proposed to induce particle refinement and therefore enhance the cycling performance. Such a concept can be extended to Si anode and be further combined with other methods to effectively improve the cycling performance of thin-film anode for LIBs.