Residue-free sodium-ion supply via electrolyte additive. (IMAGE)
Caption
Residue-free sodium-ion supply via electrolyte additive. Schematic illustration of sodium trifluoromethanesulfinate (NaSO₂CF₃) as a residue-free electrolyte additive for sodium-ion batteries. After being dissolved in the electrolyte and injected into the cell, NaSO₂CF₃ decomposes during charging to replenish sodium ions lost in the hard carbon anode, while releasing gaseous products including sulfur dioxide (SO₂), hexafluoroethane (C₂F₆), and fluoroform (CHF₃). This process improves initial Coulombic efficiency without leaving harmful solid residues.
Credit
Shu Chen, Zilong Zheng, Wenwen Wang, et al.
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CC BY-NC-ND