High temperature Li-ion battery cells utilizing boron nitride aerogels and boron nitride nanotubes

Patent metadata

Field	Value
Publication number	US-10686227-B2
Application number	US-201715822563-A
Country	US
Kind code	B2
Filing date	Nov 27, 2017
Priority date	Dec 1, 2016
Publication date	Jun 16, 2020
Grant date	Jun 16, 2020

Abstract

This disclosure provides systems, methods, and apparatus related to Li-ion batteries. In one aspect an electrolyte structure for use in a battery comprises an electrolyte and an interconnected boron nitride structure disposed in the electrolyte.

First claim

What is claimed is:

1. An electrolyte structure for use in a battery comprising:
an electrolyte; and
a boron nitride aerogel disposed in the electrolyte.

2. The electrolyte structure of claim 1 , wherein the electrolyte comprises an organic electrolyte.

3. The electrolyte structure of claim 1 , wherein the electrolyte comprises a polymer mixed with a lithium salt.

4. The electrolyte structure of claim 1 , further comprising:
a plurality of titanium dioxide nanoparticles disposed in the electrolyte.

5. The electrolyte structure of claim 4 , wherein titanium dioxide nanoparticles of the plurality of titanium dioxide nanoparticles have a diameter of about 1 nanometer to 100 nanometers.

6. The electrolyte structure of claim 4 , wherein the plurality of titanium dioxide nanoparticles has a volume fraction of about 5% to 30% in the electrolyte structure.

7. The electrolyte structure of claim 1 , wherein the boron nitride aerogel has a thickness of about 250 nanometers to 1.5 microns.

8. The electrolyte structure of claim 1 , wherein the boron nitride aerogel has pore sizes of less than about 100 nanometers.

9. The electrolyte structure of claim 1 , wherein the electrolyte comprises a polymer mixed with an ionic liquid.

10. The electrolyte structure of claim 9 , wherein the polymer comprises polymethylmethacrylate and polyacrylonitrile dissolved in anisole.

11. The electrolyte structure of claim 9 , wherein the ionic liquid comprises PYR 14− TFSI-LiTFSI (PYR 14 : N-methyl-N-butylpyrrolidinium, TFSI: bis(trifluoromethylsufonyl)imide).

12. A battery comprising:
an anode;
a cathode; and
an electrolyte structure, the electrolyte structure being in contact with the cathode and with the anode, the electrolyte structure comprising:
an electrolyte; and
a boron nitride aerogel disposed in the electrolyte.

13. The battery of claim 12 , wherein the electrolyte structure further comprises a plurality of titanium dioxide nanoparticles disposed in the electrolyte.

14. The battery of claim 12 , wherein the battery is operable up to temperatures of about 190° C.

15. The battery of claim 12 , wherein the anode comprises lithium titanate (Li 4 Ti 5 O 12 ) or graphite.

16. The battery of claim 12 , wherein the cathode comprises lithium-rich manganese oxide (Li 1+x Mn 2−x O 4 ) or lithium cobalt oxide (LiCoO 2 ).

17. The battery of claim 12 , wherein the boron nitride aerogel has a thickness of about 250 nanometers to 1.5 microns.

18. The battery of claim 12 , wherein the boron nitride aerogel has pore sizes of less than about 100 nanometers.

19. The battery of claim 12 , wherein the electrolyte comprises a polymer mixed with an ionic liquid.

20. The battery of claim 12 , wherein the electrolyte comprises a polymer mixed with a lithium salt.

Assignees

• Ergen Onur
• Zettl Alexander K
• Univ California

Inventors

• Ergen Onur
• Zettl Alexander K

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M10/0525 Primary

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

• H01M2300/0091

  in the form of mixtures · CPC title

• H01M2300/0085

  Immobilising or gelification of electrolyte · CPC title

• H01M2300/0025

  Organic electrolyte · CPC title