Onium cation with ether linkages for zinc batteries

Abstract

A molecule, and more particular a salt, formed of an onium cation having at least one ether linkage, and an anion. In particular, it may be tris(3,6-dioxaheptanyl)(methyl)ammonium bis(trifluoromethylsulfonyl)imide, tris(3,6-dioxaheptanyl)(methyl)ammonium bis(fluorosulfonyl)imide (FSI) or tris(3,6-dioxaheptanyl)(methyl)ammonium trifluoromethanesulfonate (OTf). The class of molecules may be used as additive molecules and co-salts in electrolyte solutions, esp. for zinc batteries. Up to about 66 wt. %, the molecule produces significant improvements in the performance of zinc batteries with aqueous electrolytes across multiple metrics. These results are attributed to favorable properties of the ether linkages to suppress dendrite formation and parasitic reactions such as the hydrogen evolution reaction and corrosion.

Dependencies are inferred from the claim text.