![]() 2 Analysis of electrolytes as the connecting media to all cell compounds (cathode, anode, and separator) provides information about interactions between battery components. ![]() Due to the cross-dependence of aging phenomena, they are very complicated to characterize. Identification and quantification of compounds and their decomposition products formed in aging processes gain a precise understanding of the aging processes themselves and their influencing factors. Therefore, investigations on the changes of the electrolyte composition contribute to the understanding of aging processes that still limit the battery cycling performance. 1 The investigation of aging processes in lithium-ion batteries (LIB) is a key point for the further development of rechargeable batteries in the context of research on renewable energies. 1 Introduction The fluoride-selective electrode (FSE) came up in the 1960s by Frant & Ross and was successfully applied for fluoride analysis in aqueous solutions. The validation of the method was successfully carried out and enables new areas of application. While interferences in the IC method resulted in false-high concentrations, the FSE operated free from interferences, selective and specific. The determination of the commercially available LP30 (1 mol LiPF 6 and ethylene carbonate/dimethyl carbonate (EC : DMC, 50 : 50 wt%)) electrolyte stored over 47 days and at 80 ☌, by the FSE technique was compared to the fluoride analysis by ion chromatography (IC). Statistical analysis was performed to evaluate the data and to characterize the reproducibility of the method. ![]() actual comparison influence of different amounts of electrolytes on the performance of the electrode recovery rates of defined differences in concentration), (2) precision (intra-day precision and inter-day precision), (3) selectivity (influence of the carbonate solvents on different fluoride concentrations interferents) and (4) linearity and range. ![]() The developed FSE method for the analysis of battery electrolytes was comprehensively validated in view of the (1) trueness and recovery rates (nominal vs. The influence of linear organic carbonate solvents dimethyl carbonate (DMC), ethyl methyl carbonate (EMC) and diethyl carbonate (DEC) which are used as co-solvents in battery electrolytes was investigated. In this work, a fluoride-selective electrode (FSE) was applied with regard to the analysis of fluoride in lithium hexafluorophosphate-based lithium-ion battery (LIB) electrolytes. ![]()
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