As one of the next generations of lithium–ion technology, the lithium–sulfur battery is considered a promising rechargeable energy system. Compared to the current lithium–ion technology, the lithium–sulfur battery has advantages such as high energy density as well as reducing the usage of rare earths such as nickel, manganese or cobalt because abundant sulfur is being used as a low cost alternative. Therefore, the attention to this energy storage has increased, both from a scientific and industrial point of view. In order to better understand the internal electrochemical processes of this technology, impedance-based models have been developed in various publications. However, these models differ in how they interpret the individual concentrated elements of the electrical equivalent circuit diagrams. In this paper, the internal process steps of a similar conversion reaction known from the lead–acid battery are compared and investigated with the process steps of a lithium–sulfur cell. The resulting equivalent circuit diagram is verified by electrochemical impedance spectroscopy of a prototype pouch cell. This demonstrates the transferability of selected process steps of the lead–acid battery to the lithium–sulfur technology.

作为下一代锂离子技术之一，锂硫电池被认为是一种很有前途的可充电能源系统。与目前的锂离子技术相比，锂硫电池具有能量密度高以及减少镍、锰或钴等稀土使用量等优势，因为大量的硫正被用作低成本的替代品。因此，无论是从科学还是工业的角度来看，对这种储能的关注都在增加。为了更好地了解该技术的内部电化学过程，各种出版物都开发了基于阻抗的模型。但是，这些模型的不同之处在于它们如何解释电气等效电路图中的各个集中元素。在本文中，将铅酸电池中已知的类似转化反应的内部工艺步骤与锂硫电池的工艺步骤进行比较和研究。得到的等效电路图通过原型软包电池的电化学阻抗谱进行验证。这证明了铅酸电池的选定工艺步骤可转移到锂硫技术。