Kim Dae-Yeong, Kim Han-Vin, Kang Jun
Division of Marine Engineering, Korea Maritime and Ocean University, 727 Taejong-ro, Yeongdo-gu, Busan 49112, Korea.
Department of Electrical and Electronic Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan.
Materials (Basel). 2019 Sep 5;12(18):2871. doi: 10.3390/ma12182871.
Silicon can be used in a variety of applications. Particularly, silicon particles are attracting increased attention as energy storage materials for lithium-ion batteries. However, silicon has a limited cycling performance owing to its peeling from the current collector and the volume expansion that occurs during alloying with lithium in the charging process. Significant contributors to this problem are the even distribution of silicon nanoparticles within the carbon matrix and their deep placement in the internal structure. In this study, we synthesized silicon nanoparticles and carbon materials via a bottom-up approach using a new method called plasma in solution. Silicon nanoparticles and the carbon matrix were synthesized in a structure similar to carbon black. It was confirmed that the silicon particles were evenly distributed in the carbon matrix. In addition, the evaluation of the electrochemical performance of the silicon-carbon matrix (Si-C) composite material showed that it exhibited stable cycling performance with high reversible capacity.
硅可用于多种应用。特别是，硅颗粒作为锂离子电池的储能材料正受到越来越多的关注。然而，由于硅在充电过程中从集流体上剥离以及与锂合金化时发生的体积膨胀，其循环性能有限。造成这一问题的重要因素是硅纳米颗粒在碳基体内的均匀分布及其在内部结构中的深度嵌入。在本研究中，我们通过一种名为溶液等离子体的新方法采用自下而上的方法合成了硅纳米颗粒和碳材料。硅纳米颗粒和碳基体以类似于炭黑的结构合成。证实了硅颗粒在碳基体内均匀分布。此外，对硅 - 碳基体（Si - C）复合材料的电化学性能评估表明，它具有稳定的循环性能和高可逆容量。
