A Self‐Binding, Melt‐Castable, Crystalline Organic Electrolyte for Sodium Ion Conduction. (9th November 2016)

• Record Type: Journal Article
• Authors: Chinnam, Parameswara Rao; Fall, Birane; Dikin, Dmitriy A.; Jalil, AbdelAziz; Hamilton, Clifton R.; Wunder, Stephanie L.; Zdilla, Michael J.
• Is Part Of: Angewandte Chemie. Volume 128:Number 49(2016)
• Page Start: 15480
• Page End: 15483
• Publication Date: 2016-11-09
• Subjects: Elektrochemie -- Festelektrolyte -- Kokristalle -- Natriumionenbatterien; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201606363
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: The preparation and characterization of the cocrystalline solid–organic sodium ion electrolyte NaClO4 (DMF)3 (DMF=dimethylformamide) is described. The crystal structure of NaClO4 (DMF)3 reveals parallel channels of Na + and ClO4 − ions. Pressed pellets of microcrystalline NaClO4 (DMF)3 exhibit a conductivity of 3×10 −4 S cm −1 at room temperature with a low activation barrier to conduction of 25 kJ mol −1 . SEM revealed thin liquid interfacial contacts between crystalline grains, which promote conductivity. The material melts gradually between 55–65 °C, but does not decompose, and upon cooling, it resolidifies as solid NaClO4 (DMF)3, permitting melt casting of the electrolyte into thin films and the fabrication of cells in the liquid state and ensuring penetration of the electrolyte between the electrode active particles.