Important factors for the reliable and reproducible preparation of non-aqueous electrolyte solutions for lithium batteries

Abstract

Electrolyte solutions play a crucial role in rechargeable lithium batteries. Driven by an ever-increasing demand for better batteries, more and more stringent performance requirements are being asked of electrolytes. This demand to achieve electrolytes beyond the state-of-the-art has driven an increasing number of publications over the past decade. Nevertheless, a detailed description of electrolyte preparation is frequently missing when reporting new electrolytes for batteries, creating a barrier for others to reproduce important findings. In addition, false or misleading information in a paper may result from unintentional inaccuracies during the electrolyte preparation process. This article highlights important factors for the reliable and reproducible preparation of non-aqueous electrolyte solutions for lithium batteries, with the aim of encouraging researchers to follow more rigorous reporting standards.

Acid-scavenging separators promise long-term cycling stability of lithium-ion batteries

“…The detection of trace water by the Karl Fischer titration method is highly accurate, which is recommended for the determination and reporting of water content. 79 In addition, the determination of HF content recommends the use of 19 F nuclear magnetic resonance (NMR) or F-ion selective probes. 114 In order to explore the influence of the acid-removing separator on the structure and performance of the battery, intelligent detection technology for LIBs is also an important and efficient choice.…”

“…[75][76][77][78] In practice, an empirical and strict water content control of H 2 O o 20 ppm or even 10 ppm is commonly used in the battery industry, which requires extremely high costs for maintaining the dry room for battery manufacturing. 36,79,80…”

“…The detection of trace water by the Karl Fischer titration method is highly accurate, which is recommended for the determination and reporting of water content. 79 In addition, the determination of HF content recommends the use of 19 F nuclear magnetic resonance (NMR) or F-ion selective probes. 114…”

Methods for the fast detection of water and degradation changes in lithium based electrolytes

“…Another much-discussed problem with lithiumion batteries is their safety, especially fire safety. In some respects, these concerns are preventing further use of this type of technology [9]. However, according to [9], most of the fire risks are due to the unstable and highly flammable electrolytes composed of LiPF6 and carbonate solvents.…”