Sodium-conducting ionic liquid-based electrolytes

• Published in: Electrochemistry communications Vol. 43; pp. 1 - 4
• Main Authors: Serra Moreno, J., Maresca, G., Panero, S., Scrosati, B., Appetecchi, G.B.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01-06-2014; Amsterdam Elsevier; New York, NY
• Subjects: Chemistry; Electrochemistry; Exact sciences and technology; General and physical chemistry; N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide; Properties of electrolytes: conductivity; Sodium bis(trifluoromethanesulfonyl)imide; Sodium ionic liquid electrolytes; Sodium bis(trifluoromethanesulfonyl)imide; Sodium ionic liquid electrolytes; N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide; Differential scanning calorimetry; Electrical properties; Electrolyte solution; Ionic conductivity; Temperature effect; Glass transition temperature; Operating conditions; Ionic liquid; bis(trifluoromethanesulfonyl) imide; N-butyl-N-methylpyrrolidinium; Thermal analysis; Melting point; Physicochemical properties
• ISSN: 1388-2481; 1873-1902
• DOI: 10.1016/j.elecom.2014.02.010

Mixtures, based on the N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (PYR14TFSI) ionic liquid and the NaTFSI salt, as low flammability and volatility electrolytes for safer sodium electrochemical energy storage devices, were prepared and investigated in terms of thermal and ion-transport properties. The PYR14TFSI–NaTFSI electrolytes showed melting point down to −30°C. No difference in terms of ion-transport properties was observed with respect to analogous lithium electrolyte systems. Conductivity values above 1×10−3Scm−1 were observed at room temperature.
The PYR14TFSI–NaTFSI electrolyte mixtures display room temperature conductivity above 1×10−3Scm−1 in combination with a melting point down to −30°C. [Display omitted]
•Novel PYR14FSI–NaTFSI electrolytes for high safety sodium batteries were prepared.•The electrolytes show melting point down to −30°C.•The room temperature conductivity overcomes 1×10−3Scm−1.