Sodium‑ion batteries (SIBs) are emerging as a promising alternative to lithium‑ion batteries (LIBs), driven by the limited and geographically concentrated supply of lithium and other critical metals. Sodium, in contrast, is far more abundant, widely distributed, and less costly to extract, offering a more sustainable and secure basis for large scale energy storage and beyond. All commonly used sodium conducting salts in SIB electrolytes are adapted from analogues in LIBs; while many of them perform adequately, each has associated drawbacks—such as limited electrochemical stability and poor cycling performance. To address these limitations, we have explored N-heterocyclic-based conducting salts. These salts are tunable similarly to well‑known sulfonamides: by varying substituents and choosing among different core molecular structures, their physicochemical and electrochemical properties can be tailored. After successful synthesis of two candidates, we present first electrochemical data and cycling performance, comparing them directly to the well‑established reference salt NaPF₆. The new conducting salts were electrochemically evaluated via cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), and subjected to galvanostatic cycling. Key metrics such as oxidation/reduction potential windows, ionic conductivity, and capacity retention over cycles are reported.
Furthermore different solvent and electrode material influence is evaluated.