Li[sup +] solvation in ethylene carbonate–propylene carbonate concentrated solutions: A comprehensive model

✍ Scribed by Cazzanelli, E.; Croce, Fausto; Appetecchi, Giovanni Battista; Benevelli, Francesca; Mustarelli, Piercarlo

• Book ID: 115495469
• Publisher: American Institute of Physics
• Year: 1997
• Tongue: English
• Weight: 399 KB
• Volume: 107
• Category: Article
• ISSN: 0021-9606
• DOI: 10.1063/1.474334

✦ Synopsis

Spectroscopic (Raman, NMR, impedance spectroscopy), and thermal [differential scanning calorimetry (DSC)] techniques have been used to study the solvation mechanism of lithium ions in ethylene carbonate (EC)–propylene carbonate (PC) concentrated solutions. For values of N=[Li+]/[EC+PC]⩽0.2 all the cations are solvated by ∼4 solvent molecules and interaction chiefly takes place between Li+ and the ring oxygens. For N>0.2 a part of Li+ ions begins to form complexes with two solvent molecules (sandwich configuration). At N≅0.5 nearly all cations are complexed, and a crystalline compound is formed at room temperature. For higher values of N a reassociation of the salt takes place.