Non-aqueous fluoride salts, solutions, and their uses

US11830983B2 · kind B2 · utility

Assignees

• CALIFORNIA INSTITUTE OF TECHNOLOGY · US
• HONDA MOTOR CO., LTD. · JP

Inventors

• Simon C. Jones · Whittier, US
• Victoria K. Davis · Pasadena, US
• Christopher M. Bates · Austin, US
• Nebojsa Momcilovic · Vienna, US
• Brett M. Savoie · Pasadena, US
• Michael A. Webb · Pasadena, US
• Thomas F. Miller, III · South Pasadena, US
• Robert H. Grubbs · La Cañada Flintridge, US
• Christopher Brooks · Dublin, US
• Kaoru Omichi · Toyonaka, JP

Key dates

• Filing date: Mar 30, 2021
• Grant date: Nov 28, 2023
• Expiry date: Apr 15, 2042

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/10
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

Electrolyte solutions including at least one anhydrous fluoride salt and at least one non-aqueous solvent are presented. The fluoride salt includes an organic cation having a charge center (e.g., N, P, S, or O) that does not possess a carbon in the β-position or does not possess a carbon in the β-position having a bound hydrogen. This salt structure facilitates its ability to be made anhydrous without decomposition. Example anhydrous fluoride salts include (2,2-dimethylpropyl)trimethylammonium fluoride and bis(2,2-dimethylpropyl)dimethylammonium fluoride. Combining these fluoride salts with at least one fluorine-containing non-aqueous solvent (e.g., bis(2,2,2-trifluoroethyl)ether; (BTFE)) promotes solubility of the salt within the non-aqueous solvents. The solvent may be a mixture of at least one non-aqueous, fluorine-containing solvent and at least one other non-aqueous, fluorine or non-fluorine containing solvent (e.g., BTFE and propionitrile or dimethoxyethane). The electrolyte solutions may be employed in electrochemical cells, such as batteries, fuel cells, electrolysis systems, and capacitors.