Salts for multivalent ion batteries
AssigneeUchicago Argonne, LLC
InventorsChen Liao, Trevor L. Dzwiniel, Baofei Pan, Sang-Don Han, Anthony Burrell
Life of this patent
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Abstract
Methods for preparing electrolyte salts for alkaline earth metal-ion batteries (e.g., calcium and magnesium ion batteries) are described. The electrolyte salts comprise alkaline earth metal (e.g., Mg or Ca) salts of 3,4-dicyano-2-trifluoromethylimidazole (TDI). The methods comprise contacting TDI with an alkaline earth metal bis(trifluoroacetate) salt in trifluoroacetic acid.
Claims14
A method for preparing an alkaline earth metal salt of 3,4-dicyano-2-trifluoromethylimidazole (TDI) useful as an electrolyte salt for an alkaline earth metal-ion battery, the method comprising:
- contacting TDI with a solution containing about 0.5 molar equivalents of an alkaline earth metal bis-trifluoroacetate salt of the formula (CF3CO2)2M, dissolved in trifluoroacetic acid to form a TDI salt of formula:
- wherein M is an alkaline earth metal;
- and
- recovering the TDI salt.
A method for preparing an alkaline earth metal salt of 3,4-dicyano-2-trifluoromethylimidazole (TDI) useful as an electrolyte salt for an alkaline earth metal-ion battery, the method comprising:
- contacting TDI with a solution containing about 0.45 to about 0.75 molar equivalents of an alkaline earth metal bis-trifluoroacetate salt of the formula (CF3CO2)2M, dissolved in trifluoroacetic acid to form a TDI salt of formula:
- wherein M is an alkaline earth metal;
- and
- recovering the TDI salt.
Dependencies are inferred from the claim text.