Nonmonotonic Ionic Transport and Its Correlation with Structural and Dynamic Heterogeneities in NaTFSI and NaFSI-Based Aqueous Electrolytes: Salt-in-Water versus Water-in-Salt.

Sodium bis(trifluoromethanesulfonyl)imide (NaTFSI) and sodium bis(fluorosulfonyl)imide (NaFSI) salt-based water-in-salt electrolytes (WiSEs) hold significant advantages over their Li ion-based counterparts. Experimentally, the ionic conductivities of…

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