Non-flammable electrolyte for energy storage devices

Patent metadata

Field	Value
Publication number	US-2023282882-A1
Application number	US-202217960042-A
Country	US
Kind code	A1
Filing date	Oct 4, 2022
Priority date	Sep 10, 2020
Publication date	Sep 7, 2023
Grant date	—

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

1 .- 20 . (canceled)

21 . A fire-resistant energy storage device comprising:
a) a cathode comprising reduced graphene oxide; b) an anode comprising reduced graphene oxide; and c) a fire-resistant electrolyte comprising:
i) about 30% to about 90% w/w of gamma-butyrolactone.

22 . The device of claim 21 , 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.

23 . The device of claim 22 , wherein the mesocarbon microbeads comprise a low surface area configured to minimize one or more side reactions with the electrolyte.

24 . The device of claim 21 , wherein the anode comprises reduced graphene oxide in an amount of about 0.001% to about 5% w/w.

25 . The device of claim 24 , wherein the anode further comprises graphite in an amount of about 70% to about 95% w/w.

26 . The device of claim 25 , wherein the anode further comprises about 0.1% to about 5% w/w carbon black.

27 . The device of claim 26 , wherein the anode further comprises a hydrophilic binder in an amount of about 1% to about 10% w/w.

28 . The device of claim 27 , 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-ethylenedi oxy thiophene) (PEDOT), poly(p-phenylene sulfide) (PPS), polyaniline (PANT), or any combination thereof.

29 . The device of claim 27 , wherein the anode further comprises carboxymethyl cellulose in an amount of about 0.1% to about 5%.

30 . The device of claim 21 , wherein the cathode comprises a lithium nickel cobalt aluminum oxide (NCA) cathode or a nickel:cobalt:manganese (NMC) cathode.

31 . The device of claim 30 , wherein the cathode comprises reduced graphene oxide in an amount of about 0.001% to about 5% w/w.

32 . The device of claim 31 , wherein the cathode comprises polyvinylidine fluoride (PVDF) in an amount of about 0.5% to about 5% w/w.

33 . The device of claim 32 , wherein the cathode comprises carbon black in an amount of about 0.1% to about 5% w/w.

34 . The device of claim 30 , wherein the cathode comprises a Ni:Co:Mn ratio of about 5:2:3.

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

36 . The device of claim 34 , wherein a packing density of the cathode is about 2.0 g/cm 3 to about 5 g/cm 3 .

37 . The device of claim 31 , 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).

38 . The device of claim 31 , wherein the fire-resistant electrolyte further comprises about 0.1% to about 10% w/w lithium bis(oxalato)borate (LiBOB).

39 . The device of claim 31 , wherein the fire-resistant electrolyte further comprises about 1% to about 20% w/w lithium tetrafluoroborate (LiBF 4 ).

Assignees

• Silq Tech Corporation
• Univ California

Inventors

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

Classifications

• H01M10/0565 Primary

  Polymeric materials, e.g. gel-type or solid-type · CPC title

• H01M10/0525

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

• H01M4/0416

  involving impregnation with a solution, dispersion, paste or dry powder (H01M4/0438 takes precedence) · CPC title

• H01M4/131

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

• H01M4/1393

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