化学
溶解
溶解度
氟化锂
焓
溶剂
氟化物
无机化学
碳酸乙烯酯
碳酸丙烯酯
锂(药物)
溶液焓变
热力学
物理化学
有机化学
电化学
电解质
物理
内分泌学
医学
电极
作者
Jennifer Jones,Mérièm Anouti,Magaly Caillon-Caravanier,P. Willmann,Daniel Lemordant
标识
DOI:10.1016/j.fluid.2009.07.020
摘要
The solubility of lithium fluoride has so far never been studied in alkylcarbonate solvents. These data is essential to understand the behavior of this salt in solution, in particular in the field of lithium-ion batteries. The solubility of lithium fluoride (LiF) was measured at various temperatures in propylene carbonate (PC), ethylene carbonate (EC) and dimethyl carbonate (DMC) by atomic absorption spectroscopy. The LiF free enthalpy, enthalpy and entropy of dissolution in these solvents were deduced from the results. The solubility of LiF differs significantly with the nature of the solvent, EC being by far the most solubilizing media. The high solubilizing power of EC towards LiF cannot be explain by any of the physico-chemical properties of the solvent, but by an entropy-driven phenomenon. The solubilities of LiF in water–alkylcarbonates mixtures were determined by conductimetry at several temperatures leading to the corresponding LiF thermodynamic properties in these media. Results are discussed and compared to those obtained by atomic absorption measurements. Finally, a scheme representing the different stages for the dissolution of LiF in alkylcarbonates is proposed.
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