Sodium thiophosphate catholytes for nonaqueous flow batteries

Abstract

A sodium thiophosphate composition and method of making the composition are provided. The composition includes a mixture of Na2S, S, and a thiophosphate compound dissolved in an aprotic solvent to form a solvated complex. The solvated complex has a nominal chemical formula Na2PxSy, in which 0.1≤x≤10 and 1≤y<30. A sodium thiophosphate catholyte for nonaqueous redox flow batteries and a nonaqueous redox flow battery including the sodium thiophosphate catholyte are also provided. The sodium thiophosphate catholyte includes the sodium thiophosphate composition.

Dependencies are inferred from the claim text.