PF6 and PF5 will decompose water and carbonate solvents to produce a variety of molecules, like fluorophosphates, CO2 and HF. In a Li-Ion cell, HF is an extremely bad actor, producing additional decomposition of carbonates, salt, and active materials.
OS3® stops the destructive autocatalytic production of HF.
OS3® is compatible across all Li-Ion chemistries and works as a drop-in electrolyte co-solvent material. For best performance, we do recommend optimizing the formulation around the presence of OS3®, as it will change what other "problem solving" additives are required.
OS3® has been successfully tested and demonstrated benefit in the following systems:
OS3® Solvent is designed to solvate Li strongly, with a high flash point, low freezing point, and no effect on bulk electrolyte viscosity and conductivity when used at concentrations of <5%. As shown here, OS3® only begins to negatively impact conductivity at concentrations of more than 2x the recommended amount.