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Correlating Structure and Properties of Super-Concentrated Electrolyte Solutions: O NMR and Electrochemical Characterization

ChemElectroChem, ISSN: 2196-0216, Vol: 6, Issue: 15, Page: 4002-4009
2019
  • 10
    Citations
  • 0
    Usage
  • 22
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    10
    • Citation Indexes
      10
  • Captures
    22

Article Description

Super-concentrated electrolyte solutions are of increasing interest for safer and more stable lithium and post-lithium batteries. The combination of Li and O (at natural abundance) nuclear magnetic resonance (NMR) and electrochemical characterization is proposed here as an effective approach to investigate the Li solvation structures and properties of electrolytes featuring tetraethylene glycol dimethyl ether (TEGDME) and lithium-bis(trifluoromethane sulfonyl) imide (LiTFSI). Five different formulations from salt-in-solvent to solvent-in-salt with LiTFSI at different concentrations (0.1 m, 0.5 m, 2 m, 4 m, 5 m) are investigated. The NMR results, also supported by physico-chemical characterizations such as thermal gravimetric analyses, differential scanning calorimetry, specific conductivity and viscosity, give information about the association of Li ions with anion and solvent molecules, allowing a deeper knowledge on the relationships among structure and functional properties of super-concentrated solutions.

Bibliographic Details

Irene Ruggeri; Andrea La Monaca; Francesca De Giorgio; Francesca Soavi; Catia Arbizzani; Vittorio Berbenni; Chiara Ferrara; Piercarlo Mustarelli

Wiley

Chemical Engineering; Chemistry

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