SIB-NaDFOB (NaB(C2O4F2)2) powder can be used to prepare liquid electrolyte or electrolyte additive with carbonate or ether solvents for rechargeable sodium-ion batteries. 1. J. Chen, et al. Sodium-difluoro(oxalato)borate (NaDFOB): a new electrolyte salt for Na-ion batteries, Chemical Communications, 2015, 51, 9809-9812. Specification Chemical Formula NaB(C2O4F2)2 Molecule Weight 159.92 Appearance White Powder XRD The chemical NaB(C2O4F2)2 powder is moisture-sensitive with high tendency to be hydrolysis and it should stored in glovebox without exposure to any volatile solvents.