Kazda Tomáš, Capková Dominika, Jaššo Kamil, Fedorková Straková Andrea, Shembel Elena, Markevich Alex, Sedlaříková Marie
Department of Electrical and Electronic Technology, Faculty of Electrical Engineering and Communication, Brno University of Technology, Technická 10, 61600 Brno, Czech Republic.
Department of Physical Chemistry, Faculty of Sciences, Pavol Jozef Šafárik University in Košice, Moyzesova 11, 04154 Košice, Slovakia.
Materials (Basel). 2021 Sep 26;14(19):5578. doi: 10.3390/ma14195578.
Lithium-sulfur batteries are one of the most promising battery systems nowadays. However, this system is still not suitable for practical application because of the number of shortcomings that limit its cycle life. One of the main problems related to this system is the volumetric change during cycling. This deficiency can be compensated by using the appropriate binder. In this article, we present the influence of a water-soluble binder carrageenan on the electrochemical properties of the Li-S battery. The electrode with a carrageenan binder provides good stability during cycling and at high C-rates. Electrochemical testing was also carried out with a small prototype pouch cell with a capacity of 16 mAh. This prototype pouch cell with the water-based carrageenan binder showed lower self-discharge and low capacity drop. Capacity decreased by 7% after 70 cycles.
锂硫电池是当今最有前景的电池系统之一。然而，由于存在一些限制其循环寿命的缺点，该系统仍不适合实际应用。与该系统相关的主要问题之一是循环过程中的体积变化。这种不足可以通过使用合适的粘结剂来弥补。在本文中，我们展示了水溶性粘结剂卡拉胶对锂硫电池电化学性能的影响。含有卡拉胶粘结剂的电极在循环过程中和高倍率下都具有良好的稳定性。还使用了一个容量为16毫安时的小型软包电池原型进行了电化学测试。这个带有水基卡拉胶粘结剂的软包电池原型显示出较低的自放电率和较小的容量下降。70次循环后容量下降了7%。
