IP Library › Granted Patent US 10,680,285
Granted Patent B2
US 10,680,285 · App. 16/025,676 · Granted Jun 9, 2020

Salts for multivalent ion batteries

Inventors: Chen Liao (Willowbrook, IL); Trevor L. Dzwiniel (Carol Stream, IL); Baofei Pan (Woodridge, IL); Sang-Don Han (Woodridge, IL); Anthony Burrell (Naperville, IL)
Assignee: UCHICAGO ARGONNE, LLC
H01M10/0568C01B21/084C01B21/086C07D233/90C07D233/93H01M10/054H01M10/0563H01M10/0569
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Quick Facts
Patent No.
US 10,680,285
App. No.
16/025,676
Granted
Jun 9, 2020
Kind
B2
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.

Claims (20)

1. 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 (CF 3 CO 2 ) 2 M, dissolved in trifluoroacetic acid to form a TDI salt of formula:

wherein M is an alkaline earth metal; and

recovering the TDI salt.

2. The method of claim 1 , wherein M is Mg.

3. The method of claim 1 , wherein M is Ca.

4. The method of claim 1 , wherein salt of the formula (CF 3 CO 2 ) 2 M, is dissolved in trifluoroacetic acid at a concentration in the range of 0.05 to about 2 molar.

5. The method of claim 4 , wherein M is Mg ion.

6. The method of claim 4 , wherein M is Ca ion.

7. The method of claim 1 , wherein the step of recovering the TDI salt comprises filtration or evaporation of trifluoroacetic acid solvent.

8. 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 (CF 3 CO 2 ) 2 M, dissolved in trifluoroacetic acid to form a TDI salt of formula:

wherein M is an alkaline earth metal; and

recovering the TDI salt.

9. The method of claim 8 , wherein M is Mg.

10. The method of claim 8 , wherein M is Ca.

11. The method of claim 8 , wherein salt of the formula (CF 3 CO 2 ) 2 M, is dissolved in trifluoroacetic acid at a concentration in the range of 0.05 to about 2 molar.

12. The method of claim 11 , wherein M is Mg ion.

13. The method of claim 11 , wherein M is Ca ion.

14. The method of claim 8 , wherein the step of recovering the TDI salt comprises filtration or evaporation of trifluoroacetic acid solvent.

Assignments (2)
CONFIRMATORY LICENSE Recorded Mar 10, 2021
From: UCHICAGO ARGONNE, LLC
To: UNITED STATES DEPARTMENT OF ENERGY
Reel/Frame 055546/0314 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 3, 2018
From: LIAO, CHEN; DZWINIEL, TREVOR L.; PAN, BAOFEI; HAN, SANG-DON; BURRELL, ANTHONY
To: UCHICAGO ARGONNE, LLC
Reel/Frame 046258/0971 →
Continuity (2)
Division 14940667 · Nov 13, 2015
Related Publication 20180316060A1 · Nov 1, 2018