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Raman and NMR analysis of LiClO4 concentrated solutions in ethylene carbonate-propylene carbonate

TitleRaman and NMR analysis of LiClO4 concentrated solutions in ethylene carbonate-propylene carbonate
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication1996
AuthorsCazzanelli, E., Mustarelli P., Benevelli F., Appetecchi Giovanni Battista, and Croce F.
JournalSolid State Ionics
Volume86-88
Pagination379-384
ISSN01672738
KeywordsCation complexes, Concentrated solutions, Electrolytes, Ethylene carbonate, Gels, Lithium batteries, Lithium compounds, Lithium perchlorate, Nuclear magnetic resonance spectroscopy, Organic solvents, Propylene carbonate, Raman spectroscopy, Solutions
Abstract

A comparative Raman and 13C-NMR study has been performed on LiClO4 concentrated solutions in ethylene carbonate (EC)-propylene carbonate (PC), which are of interest for electrochemical devices like secondary lithium batteries. A phase transition has been detected near a ratio N = [Li+]/[EC + PC] ≅ 0.5. Below this threshold, Li+ ions are relatively free to move and are solvated by EC and PC with a coordination number, n, which approaches ∼2. In more concentrated solutions the cations seem to form a complex by "sandwiching" an EC and a PC molecule.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-18344404169&doi=10.1016%2f0167-2738%2896%2900154-3&partnerID=40&md5=fe65ac80358a3b2bb5a345e8286d3bdb
DOI10.1016/0167-2738(96)00154-3
Citation KeyCazzanelli1996379