*1.3. Structure and Technical Contribution*

In this article, the influences of temperature, C-rate, type, and concentration of Li salt in the electrolyte on the lithium deposition were studied. A variety of electrolytes including LiFSI in 1,2-dimethoxyethane (DME) with a molar concentration of *c* = 1 M, LiFSI in DME with *c* = 2 M and lithium LiTFSI in DME, also with a concentration of *c* = 1 M, were investigated. In addition to the Coulombic efficiency, EIS measurements were carried out to evaluate the stability and aging behavior. The best performance is achieved by a high concentration of LiFSI-DME electrolyte at 25 ◦C. The remainder of this article is structured as follows. Section 2, presents the materials and methods for evaluating the degradation of the cells. The cell preparation, the measurement procedure and matrix are discussed in detail. The results of the conducted experiments, including the data on the Coulombic efficiency and the Electrochemical Impedance Spectroscopy (EIS) measurements, are shown and discussed in Sections 3 and 4. Finally, an outlook of the future work and a conclusion are given.
