Nanowire-based solid electrolytes and lithium-ion batteries including the same

Patent metadata

Field	Value
Publication number	US-9853324-B2
Application number	US-201414917702-A
Country	US
Kind code	B2
Filing date	Sep 11, 2014
Priority date	Sep 11, 2013
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

A solid electrolyte for a lithium-ion battery including a film having a multiplicity of nanowires, each nanowire including a lithium-ion conductive material, and a lithium-ion battery including the solid electrolyte. The multiplicity of nanowires may be formed in an electrospinning process. The lithium-ion battery may be formed by compressing the solid electrolyte between an anode layer and a cathode layer.

First claim

What is claimed is:

1. A solid electrolyte for a lithium-ion battery, the solid electrolyte comprising:
a film comprising a multiplicity of nanowires, each nanowire comprising a lithium-ion conductive material.

2. The solid electrolyte of claim 1 , wherein the film has a thickness ranging from 100 nm to 1 mm.

3. The solid electrolyte of claim 1 , wherein the nanowires are amorphous, crystalline, or any combination thereof.

4. The solid electrolyte of claim 1 , wherein the multiplicity of nanowires are aligned in the film.

5. The solid electrolyte of claim 1 , wherein the multiplicity of nanowires are randomly oriented in the film.

6. The solid electrolyte of claim 1 , wherein the lithium-ion conductive material is an oxide comprising lithium.

7. The solid electrolyte of claim 6 , wherein the oxide comprising lithium is a perovskite or a garnet-like oxide.

8. The solid electrolyte of claim 7 , wherein the oxide comprising lithium is a perovskite, and the perovskite comprises lanthanum and titanium.

9. The solid electrolyte of claim 8 , wherein the perovskite has a stoichiometry of Li 3x La 2/3-x □ 1/3-2x TiO 3 , where □ represents vacancies in the perovskite and 0<x<0.16.

10. The solid electrolyte of claim 9 , wherein the perovskite comprises Li 0.3 La 0.56 TiO 3 .

11. The solid electrolyte of claim 7 , wherein the oxide comprising lithium is a garnet-like oxide having a stoichiometry of Li x La 3 M 2 O 12 (M=Ta, Nb, Zr) or Li 6 ALa 2 M 2 O 12 (A=Ca, Sr, Ba; M=Nb, Ta).

12. The solid electrolyte of claim 11 , wherein the garnet-like oxide comprises Li 7 La 3 Zr 2 O 12 .

13. The solid electrolyte of claim 6 , wherein the oxide comprising lithium is LiNbO 3 .

14. The solid electrolyte of claim 1 , wherein the film comprises an additive.

15. The solid electrolyte of claim 1 , wherein the film comprises a multiplicity of electro spun nanowires.

16. A lithium-ion battery comprising the solid electrolyte of claim 1 .

17. The lithium-ion battery of claim 16 , further comprising an anode and a cathode, wherein the film is in direct contact with the anode and the cathode.

18. The solid electrolyte of claim 1 , wherein the nanowires are ceramic nanowires.

19. A method of preparing a solid electrolyte for a lithium-ion battery, the method comprising forming a film comprising lithium-ion-conductive nanowires.

20. The method of claim 19 , wherein forming the film comprising lithium-ion-conductive nanowires comprises electrospinning a precursor solution comprising nanowires to yield the film.

21. A method of fabricating a lithium-ion battery, the method comprising:
compressing a solid electrolyte between an anode layer and a cathode layer, wherein the solid electrolyte comprises a film comprising a multiplicity of nanowires, each nanowire comprising a lithium-ion conductive material.

22. A lithium ion battery formed by the method of claim 21 .

Assignees

• Chan Candace
• Yang Ting
• Li Ying
• Univ Arizona State

Inventors

• Chan Candace
• Yang Ting
• Li Ying

Classifications

• H01M10/0525

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

• H01M10/058

  Construction or manufacture · CPC title

• H01M10/0585

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• H01M2004/028

  Positive electrodes · CPC title

• H01M2300/0071

  Oxides · CPC title