Non-flammable electrolyte for energy storage devices

Patent metadata

Field	Value
Publication number	US-12199238-B2
Application number	US-202217960042-A
Country	US
Kind code	B2
Filing date	Oct 4, 2022
Priority date	Sep 10, 2020
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

Provided herein are energy storage devices high energy and power densities, cycle life, and safety. In some embodiments, the energy storage device comprise a non-flammable electrolyte that eliminate and/or reduce fire hazards for improved battery safety, with improved electrode compatibility with electrode materials.

First claim

What is claimed is:

1. A fire-resistant energy storage device comprising:
a) a cathode comprising reduced graphene oxide;
b) an anode comprising reduced graphene oxide wherein the anode comprises reduced graphene oxide in an amount of about 0.001% to about 5% w/w; and
c) a fire-resistant electrolyte comprising:
i) about 30% to about 90% w/w of gamma-butyrolactone.

2. The device of claim 1 , wherein the anode further comprises mesocarbon microbeads, wherein the mesocarbon microbeads and the reduced graphene oxide are particles comprising a diameter of about 5 microns to about 10 microns.

3. The device of claim 2 , wherein the mesocarbon microbeads minimize one or more side reactions with the electrolyte.

4. The device of claim 1 , wherein the anode further comprises graphite in an amount of about 70% to about 95% w/w.

5. The device of claim 4 , wherein the anode further comprises about 0.1% to about 5% w/w carbon black.

6. The device of claim 5 , wherein the anode further comprises a hydrophilic binder in an amount of about 1% to about 10% w/w.

7. The device of claim 6 , wherein the hydrophilic binder comprises styrene butadiene (SBR), polyvinylidene fluoride (PVDF), sodium alginate, polytetrafluoroethylene (PTFE), sodium carboxymethyl chitosan (CCTS), polyacrylic acid (PAA), polystyrene sulfonate (PSS), polyvinyl alcohol (PVA), poly(fluorene), polyphenylene, polypyrene, polyazulene, polynaphthalene, poly(acetylene), poly(p-phenylene vinylene), poly(pyrrole) (PPY), poly carbazole, polyindole, polyazepine, poly(thiophene)s (PT), poly(3,4-ethylenedioxythiophene) (PEDOT), poly(p-phenylene sulfide) (PPS), polyaniline (PANI), or any combination thereof.

8. The device of claim 6 , wherein the anode further comprises carboxymethyl cellulose in an amount of about 0.1% to about 5% w/w.

9. The device of claim 1 , wherein the cathode comprises a lithium nickel cobalt aluminum oxide (NCA) cathode or a nickel:cobalt:manganese (NMC) cathode.

10. The device of claim 9 , wherein the cathode comprises reduced graphene oxide in an amount of about 0.001% to about 5% w/w.

11. The device of claim 10 , wherein the cathode comprises polyvinylidine fluoride (PVDF) in an amount of about 0.5% to about 5% w/w.

12. The device of claim 11 , wherein the cathode comprises carbon black in an amount of about 0.1% to about 5% w/w.

13. The device of claim 10 , wherein the fire-resistant electrolyte further comprises about 5% to about 50% w/w 1,1,2,2-Tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether (FEP).

14. The device of claim 10 , wherein the fire-resistant electrolyte further comprises about 0.1% to about 10% w/w lithium bis(oxalato)borate (LiBOB).

15. The device of claim 10 , wherein the fire-resistant electrolyte further comprises about 1% to about 20% w/w lithium tetrafluoroborate (LiBF 4 ).

16. The device of claim 9 , wherein the cathode comprises a Ni:Co:Mn ratio of about 5:2:3.

17. The device of claim 16 , wherein a packing density of the cathode is about 2.0 g/cm 3 to about 5 g/cm 3 .

18. The device of claim 9 , wherein the cathode comprises NCA in an amount of 30% to 90% w/w and from about 1% to about 15% w/w lithium.

Assignees

• Nanotech Energy Inc
• Univ California

Inventors

• El-Kady Maher F
• Mcverry Brian T
• Rao Ethan
• Kaner Richard B

Classifications

• H01M4/1391

  of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title

• H01M2300/008

  Halides · CPC title

• H01M2300/0051

  Carbonates · CPC title

• H01M4/133

  Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title

• H01M4/1393

  of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title