journal article Feb 02, 2016

Comprehensive Insights into the Reactivity of Electrolytes Based on Sodium Ions

ChemSusChem Vol. 9 No. 5 pp. 462-471 · Wiley
View at Publisher Save 10.1002/cssc.201501605
Abstract
AbstractWe report a systematic investigation of Na‐based electrolytes that comprise various NaX [X=hexafluorophosphate (PF6), perchlorate (ClO4), bis(trifluoromethanesulfonyl)imide (TFSI), fluorosulfonyl‐(trifluoromethanesulfonyl)imide (FTFSI), and bis(fluorosulfonyl)imide (FSI)] salts and solvent mixtures [ethylene carbonate (EC)/dimethyl carbonate (DMC), EC/diethyl carbonate (DEC), and EC/propylene carbonate (PC)] with respect to the Al current collector stability, formation of soluble degradation compounds, reactivity towards sodiated hard carbon (Nax‐HC), and solid–electrolyte interphase (SEI) layer formation. Cyclic voltammetry demonstrates that the stability of Al is highly influenced by the nature of the anions, solvents, and additives. GC–MS analysis reveals that the formation of SEI telltales depends on the nature of the linear alkyl carbonates and the battery chemistry (Li+ vs. Na+). FTIR spectroscopy shows that double alkyl carbonates are the main components of the SEI layer on Nax‐HC. In the presence of Na salts, EC/DMC and EC/DEC presented a higher reactivity towards Nax‐HC than EC/PC. For a fixed solvent mixture, the onset temperature follows the sequence NaClO4<NaFTFSI<NaPF6<NaTFSI<NaFSI, and the total heat generated increases in the order NaFSI<NaTFSI<NaClO4<NaPF6<NaFTFSI.
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Cited By
262
Chemical Engineering Journal
Advanced Science
Advanced Energy Materials
Advanced Energy Materials
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262
Citations
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Published
Feb 02, 2016
Vol/Issue
9(5)
Pages
462-471
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Cite This Article
Gebrekidan Gebresilassie Eshetu, Sylvie Grugeon, Huikyong Kim, et al. (2016). Comprehensive Insights into the Reactivity of Electrolytes Based on Sodium Ions. ChemSusChem, 9(5), 462-471. https://doi.org/10.1002/cssc.201501605
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