2KG – 5KG.
Sodium-ion batteries (SIBs), as a cost-effective alternative to lithium-ion systems, have gained considerable attention in recent years. The electrolyte plays a pivotal role by ensuring ionic conductivity, electrochemical stability, and interfacial compatibility with electrodes. Compared to Li-ion systems, SIBs differ in ion radius, redox potential, and interfacial behavior, necessitating specialized electrolyte formulation.
Sodium-ion electrolytes are currently applied in mid-to-low energy density applications such as stationary storage, low-speed EVs, and grid balancing. With advancements in high-voltage cathodes (e.g., Na₃V₂(PO₄)₃) and high-capacity hard carbon anodes, future developments focus on higher voltage stability, thermal resistance, and fluorine-free formulations.
Main Parameters:
Solvent: Carbonates (EC, PC, DMC, EMC) or ethers (TEGDME, DME)
Solute: Common sodium salts: NaPF₆, NaClO₄, NaFSI, NaTFSI
Additive: FEC, VC, phosphate esters, SEI film-formers, etc.
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