Chemicals | Low Temperature Viscosity Measurements - Lovis for Battery Electrolytes
The viscosity of a battery electrolyte directly influences its ion mobility. Lovis supports viscosity measurements across a wide temperature range (-40 °C with external cooling option). It also enables the measurement of highly corrosive solvents for ion salts with small volume PCTFE capillaries.
Since the introduction of lithium-ion batteries in 1990, interest in this technology has steadily grown, not only for portable devices but also for the automotive industry. Their high energy density and outstanding cycle stability are the main reasons for their commercial success. However, several problems arise with the use of the most common non-aqueous electrolytes. They often contain lithium hexafluorophosphate (LiPF₆) as a conductive salt and a mixture of cyclic and non-cyclic organic carbonates.
In addition to the high solvent purity required (e.g. traces of protic impurities such as water can cause severe deterioration of the cell’s performance), the cell performance has to be stable over a broad temperature range from arctic to tropical conditions without any significant degradation. Therefore, an exact characterization of newly developed electrolytes at different temperatures is an essential part in the lithium-ion cell research today.
Lovis can be used for electrolyte measurements even at temperatures below zero. Equipped with cooling option and in combination with the PCTFE capillary, it enables the measurement of highly corrosive substances over a wide temperature range.
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