Symmetrical or asymmetrical alkylsulfonyl imide or cyclic alkylene sulfonylimide salts as cathode additives, electrolyte additives, or SI anode additives for SI anode-based li-ion cells

Patent metadata

Field	Value
Publication number	US-11942599-B2
Application number	US-202117508348-A
Country	US
Kind code	B2
Filing date	Oct 22, 2021
Priority date	Oct 28, 2020
Publication date	Mar 26, 2024
Grant date	Mar 26, 2024

Abstract

Electrode or electrolyte additives for energy storage devices comprising symmetrical or asymmetrical alkylsulfonyl imide or cyclic alkylene sulfonylimide salts are disclosed. The energy storage device comprises a first electrode and a second electrode, wherein at least one of the first electrode and the second electrode is a Si-based electrode, a separator between the first electrode and the second electrode, and an electrolyte composition. Symmetrical or asymmetrical alkylsulfonyl imide or cyclic alkylene sulfonylimide salts may serve as additives to the electrodes or to the electrolyte composition, or both.

First claim

What is claimed is:

1. An energy storage device comprising:
an anode and a cathode, where at least one of the anode or the cathode contains an electrode additive;
a separator between the anode and the cathode; and
an electrolyte composition; wherein
said electrode additive comprises an asymmetrical alkylsulfonyl imide or alkylene sulfonylimide salt; and
wherein the electrode additive is of formula (Ia) or (Ib):

wherein X is Na, K, Rb, Cs, Fr, Mg, Ca, Zn or Al;
R 1 and R 2 are different and are selected from the group consisting of H, OH, alkylene, alkoxy, alkenyl, alkenylene, alkynyl, alkynylene, cycloalkyl, cycloalkylene, aryl, arylene, heteroaryl, heteroalkyl, heteroalkylene, heterocycloalkyl, and heterocycloalkylene, which may be also further optionally substituted.

2. The energy storage device of claim 1 , wherein the anode is a Si-dominant electrode.

3. The energy storage device of claim 1 , wherein the electrode additive comprises an asymmetrical perfluoroalkylsulfonyl imide or acyclic perfluoroalkylene sulfonylimide salt.

4. The energy storage device of claim 1 , wherein the electrode additive is Potassium (trifluoromethanesulfonyl) (vinylsulfonyl)imide.

5. An energy storage device comprising:
a first electrode and a second electrode, wherein at least one of the first electrode and the second electrode is a Si-based electrode;
a separator between the first electrode and the second electrode; and
an electrolyte composition; wherein

said electrolyte composition comprises at least one electrolyte additive comprising an asymmetrical alkylsulfonyl imide or alkylene sulfonylimide salt; and
wherein the electrolyte additive is of formula (Ia) or (Ib):

wherein X is Na, K, Rb, Cs, Fr, Mg, Ca, Zn or Al;
R 1 and R 2 are different and are selected from the group consisting of H, OH, alkylene, alkoxy, alkenyl, alkenylene, alkynyl, alkynylene, cycloalkyl, cycloalkylene, aryl, arylene, heteroaryl, heteroalkyl, heteroalkylene, heterocycloalkyl, and heterocycloalkylene, which may be also further optionally substituted.

6. The energy storage device of claim 5 , wherein the second electrode is a Si-dominant electrode.

7. The energy storage device of claim 5 , wherein the second electrode comprises a self-supporting composite material film.

8. The energy storage device of claim 7 , wherein the composite material film comprises:
greater than 0% and less than about 95% by weight of silicon particles, and
greater than 0% and less than about 90% by weight of one or more types of carbon phases, wherein at least one of the one or more types of carbon phases is a substantially continuous phase that holds the composite material film together such that the silicon particles are distributed throughout the composite material film.

9. The energy storage device of claim 5 , wherein the electrolyte additive comprises an asymmetrical perfluoroalkylsulfonyl imide or acyclic perfluoroalkylene sulfonylimide salt.

10. The energy storage device of claim 5 , wherein the electrolyte additive is Potassium (trifluoromethanesulfonyl) (vinylsulfonyl)imide.

11. The energy storage device of claim 1 , wherein the electrolyte composition comprises a solvent selected from the group consisting of one or more of ethyl methyl carbonate (EMC), methyl acetate, dimethyl carbonate (DMC), diethyl carbonate (DEC), gamma butyrolactone, methyl acetate (MA), ethyl acetate (EA), methyl propanoate, fluoro ethylene carbonate (FEC), di-fluoroethylene carbonate (DiFEC), Trifluoropropylene carbonate (TFPC), ethylene carbonate (EC), vinylene carbonate (VC) and propylene carbonate (PC).

12. The energy storage device of claim 11 , wherein the solvent comprises FEC, EC or TFPC at a concentration of at 5% or more.

13. The energy storage device of claim 12 , wherein the electrolyte composition is substantially free of non-fluorine containing cyclic carbonates.

14. A method of forming an energy storage device, the method comprising:
forming an energy storage device comprising a cathode, an electrolyte composition, and an anode;
wherein said one or more of said cathode or said anode and/or said electrolyte composition comprise an additive compound;
said additive compound comprising an asymmetrical alkylsulfonyl imide or alkylene sulfonylimide salt;
wherein said one or both of said cathode and said anode is formed using, at least, the following steps:
said electrode material is mixed to create a slurry;
said electrolyte composition is added to said slurry;
said slurry is coated on metal foil; and

the coated metal foil is dried salt; and
wherein the additive compound is of formula (Ia) or (Ib):

wherein X is Na, K, Rb, Cs, Fr, Mg, Ca, Zn or Al;
R 1 and R 2 are different and are selected from the group consisting of H, OH, alkylene, alkoxy, alkenyl, alkenylene, alkynyl, alkynylene, cycloalkyl, cycloalkylene, aryl, arylene, heteroaryl, heteroalkyl, heteroalkylene, heterocycloalkyl, and heterocycloalkylene, which may be also further optionally substituted.

15. The method of claim 14 , wherein the anode is a Si-dominant electrode.

16. The method of claim 14 , wherein the anode comprises a self-supporting composite material film.

17. The method of claim 16 , wherein the composite material film comprises:
greater than 0% and less than about 95% by weight of silicon particles, and
greater than 0% and less than about 90% by weight of one or more types of carbon phases, wherein at least one of the one or more types of carbon phases is a substantially continuous phase that holds the composite material film together such that the silicon particles are distributed throughout the composite material film.

18. The method of claim 14 , wherein the additive compound comprises a symmetrical or asymmetrical perfluoroalkylsulfonyl imide or acyclic perfluoroalkylene sulfonylimide salt.

19. The method of claim 14 , wherein the additive compound is Potassium (trifluoromethanesulfonyl) (vinylsulfonyl)imide.

Assignees

• Enevate Corp

Inventors

• Ji Liwen
• Park Benjamin

Classifications

• H01M10/0567 Primary

  characterised by the additives · CPC title

• C07C317/28

  with sulfone or sulfoxide groups bound to acyclic carbon atoms of the carbon skeleton · CPC title

• H01M4/386

  Silicon or alloys based on silicon · CPC title

• H01M10/0525 Primary

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M10/0569

  characterised by the solvents · CPC title