Journal
CHEMISTRY OF MATERIALS
Volume 26, Issue 17, Pages 4908-4914Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm403349t
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Funding
- European Research Institute Alistore ERI
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This article describes synthesis and basic electrochemical and structural properties of designed sodium salts- or application in liquid nonaqueous sodium electrolytes. There has been two imidazole fluorine derivative sodium salts synthesized: sodium 4,5-dicyano-2-(trifluoromethyl)imidazolate (NaTDI) and sodium 4,5-dicyano-2-(pentafluoroethyl)imidazolate (NaPDI). The structure of the Salts has been confirmed by means of Raman spectroscopy, nuclear magnetic resonance (C-13 NMR and F-19 NMR), X-ray diffraction thermogravimetry (TGA), and differential scanning calorimetry (DSC). Electrochemical characterization included ionic conductivity measurements, dynamic viscosity, and electrochemical stability of solutions of the salts in propylene carbonate (PC) at different temperatures. Raman spectra of the electrolytes have been performed to carefully monitor the degree of ionic associations specially ion pairing tendencies.
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