pure LiDFOB – Chlorine-free electrolyte synthesis for LiDFOB

The already commercially available Difluoro-oxalattoborat (LiDFOB) is used as an electrolyte in lithium-ion batteries due to his good heat resistance and high cycle rates.

Scientists at the Westphalian Wilhelms University of Muenster invented an elegant LiDFOB manufacturing process based on LiBF4 (Lithiumtetrafluoroborate) and LiBOB (Bisoxalatoborate lithium) as starting materials. In contrast to the industrial synthesis route utilizing silicon tetrachloride, the novel synthesis yields LiDFOB with no chloride impurities are obtained. In addition, the handling of the reactants as trifluoroborate etherate or silicon tetrachloride is inconvenient or dangerous. Commercial Opportunities: Lithium-ion batteries are widely used as mobile energy storage, with LiDFOB being an often used electrolyte. The pure LiDFOB process can replace conventional synthetic methods. The halogen-free production keeps the manufacturing process safe, no chlorine purification is needed and ensures longer electrode life for the battery.

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