Fluorinated ionic liquids for battery electrolytes
| DWPI Title: Metal-air battery for non-aqueous energy storage device, has a porous cathode current collector which has an air interface, separator which is in contact with electrolyte and bonded between porous cathode current collector and metal anode |
| Abstract: An ionic liquid comprising a cationic chemical species and an anionic chemical species. The cationic chemical species comprising a nitrogen containing moiety and a partially fluorinated alkyl chain moiety, wherein the partially fluorinated alkyl chain moiety is bonded to a nitrogen atom of the nitrogen containing moiety. The ionic liquid can be used as an electrolyte, as an additive to an organic solvent, as a lubricant, as a hydrophobic coating, as a treatment for fluorinated pollutants, as an electrolyte for sensor applications, as a stabilizing additive for existing battery electrolytes, and as an emulsifier. |
| Use: Metal-air battery for non-aqueous energy storage device. |
| Advantage: Avoids the use of hydrogen fluoride and provides a relatively safe method to synthesize a partially fluorinated alkyl halide that can be used as a precursor to an ionic liquid. Allows charge carriers within the ionic liquid to pass, and prevents short circuits between the metal anode and the porous cathode current collector. |
| Novelty: The battery (100) has a porous cathode current collector (115) which has an air interface. An electrolyte (120) has an ionic liquid and optionally an organic solvent disposed in pores of the porous cathode current collector. The ionic liquid includes a cationic chemical species with a nitrogen containing moiety and a partially fluorinated alkyl chain moiety, and an anionic chemical species. A first carbon atom of the partially fluorinated alkyl chain moiety is non-fluorinated and bonded to a nitrogen atom of the nitrogen containing moiety. A separator is in contact with the electrolyte and bonded between the porous cathode current collector and the metal anode (110). |
| Filed: 8/1/2017 |
| Application Number: US15666276A |
| Tech ID: SD 14122.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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