Main Salts

The main salt sets the working ion, the electrochemical window, and the quality of the SEI/CEI — every other electrolyte component is tuned around this choice. This collection covers the lithium, sodium, potassium, and multivalent (Mg, Ca, Zn, Al) conducting salts we stock as standalone powders, sized for electrolyte formulation, polymer/gel work, and small-format cell prototyping.

Salts are grouped here by the working cation, because that is how a researcher actually picks one.

Lithium-ion salts

• Imide salts (LiFSI, LiTFSI-class, LiFTFSI) — high ionic conductivity, strong thermal stability, and improved hydrolysis resistance versus LiPF6; favored for high-voltage and Li-metal-compatible chemistries. LiFTFSI is the asymmetric fluorosulfonyl/triflyl-imide variant positioned between LiFSI and LiTFSI.
• Triflate-type (LiOTf) — hydrolytically robust, common in polymer and solid-state electrolyte research where moisture sensitivity and HF generation must be avoided.
• Heterocyclic imidazolide (LiTDI) — fluorine-lean, high-voltage-stable salt that supports Al current-collector passivation and SEI/CEI formation; used as a co-salt or LiPF6 alternative.

Sodium- and potassium-ion salts

• NaTFSI, NaBF4 — imide and tetrafluoroborate salts for SIB electrolyte screening; NaTFSI offers higher conductivity and better moisture tolerance, NaBF4 is the workhorse PF6-free alternative.
• KTFSI, KPF6 — the imide and hexafluorophosphate pair for PIB cells; KPF6 remains the baseline, KTFSI is the higher-stability comparator.

Multivalent-ion salts

• Mg(TFSI)2, Ca(TFSI)2 — imide salts for divalent-cation cell research where TFSI's weakly coordinating anion helps Mg2+ / Ca2+ desolvation.
• Zn(OTf)2 — triflate salt for aqueous and mildly acidic Zn-ion batteries, including water-in-salt and hybrid systems.
• Al(OTf)3 — trivalent triflate for aluminum-ion electrolyte studies, supporting wider electrochemical windows than chloroaluminate ionic-liquid systems alone.

If you are building a baseline lithium electrolyte, start with the imide and triflate families above and pair them with carriers from Solvents and stabilizers from Additives. For sodium, potassium, or multivalent work, pick the salt by working cation here and return to Electrolytes for the matching solvent and additive options.