Cathode, lithium air battery including same, and preparation method thereof

Patent metadata

Field	Value
Publication number	US-10439227-B2
Application number	US-201815915210-A
Country	US
Kind code	B2
Filing date	Mar 8, 2018
Priority date	Feb 21, 2013
Publication date	Oct 8, 2019
Grant date	Oct 8, 2019

Abstract

An air battery cathode including an organic-inorganic composite material including lyophobic nanopores, the organic-inorganic composite material including a porous metal oxide, and a lyophobic layer on a surface of a pore of the porous metal oxide and having a contact angle of greater than about 90°; and a binder. Also a lithium air battery including the cathode, and a method of manufacture the cathode.

First claim

What is claimed is:

1. A method of manufacturing an air battery cathode, the method comprising combining an organic-inorganic composite material and a binder to manufacture the cathode, wherein the organic-inorganic composite material is manufactured by:
impregnating a porous material with a reactive compound comprising a reactive functional group bondable to the porous material; and
chemically bonding the reactive compound to a surface of the porous material to form a surface modifier on the surface of the porous material to manufacture the organic-inorganic composite material,
wherein the porous material comprises an oxide of an element of Groups 3 to 14 of the Periodic Table.

2. A method of manufacturing an air battery cathode, the method comprising combining an organic-inorganic composite material and a binder to manufacture the cathode, wherein the organic-inorganic composite material is manufactured by:
impregnating a porous material with a reactive compound comprising a reactive functional group bondable to the porous material; and
chemically bonding the reactive compound to a surface of the porous material to form a surface modifier on the surface of the porous material to manufacture the organic-inorganic composite material,
wherein the chemically bonding is performed at a temperature in a range from about 40° C. to about 80° C.

3. The method of claim 1 , wherein the reactive functional group is a hydroxyl group, a thiol group, an alkoxy group, a thioalkyl group, a halogen group, an aldehyde group, a carboxyl group, or a carboxylate group.

4. The method of claim 3 , wherein the reactive compound is a silane.

5. The method of claim 1 , wherein the organic-inorganic composite material comprises surface modified nanopores.

6. The method of claim 1 , wherein the surface modifier is on a surface of a nanopore of the porous material.

7. The method of claim 1 , wherein pores of the porous material are ordered.

8. The method of claim 1 , wherein pores of the porous material have a periodic pore structure, and a contact angle of the surface modifier with respect to water at a temperature of 20° C. is greater than about 90°.

9. The method of claim 1 , wherein the organic-inorganic composite material has an average pore size in a range from about 3 nanometers to about 50 nanometers.

10. The method of claim 9 , wherein the organic-inorganic composite material has a peak in a pore size distribution of the organic-inorganic composite material in a range from about 3 nanometers to about 50 nanometers, and 75% of the nanopores have a size of about 3 nanometers to about 50 nanometers.

11. The method of claim 9 , wherein an amount of the surface modifier may be about 2 weight percent to about 50 weight percent, based on a total weight of the organic-inorganic composite material.

12. The method of claim 1 , wherein the organic-inorganic composite material has an average pore size in a range from about 3 nanometers to about 15 nanometers.

13. The method of claim 1 , wherein the organic-inorganic composite material is in a form of particles.

14. The method of claim 1 , wherein the porous material comprises surface modified nanopores, and the surface modifier is disposed on at least a portion of the surface modified nanopores.

15. The method of claim 2 , wherein the porous material comprises an element of Groups 3 to 14 of the Periodic Table.

16. The method of claim 1 , wherein the porous material comprises Mg, Al, Si, P, Ca, Ti, V, Ga, Ge, Sr, Zr, Nb, Mo, In, Sn, Hf, Ta, or W.

17. The method of claim 1 , wherein the surface modifier comprises an organic compound which is bonded to the surface of the pores of the porous material.

18. The method of claim 1 , wherein the surface modifier comprises F, Cl, Br, or I.

19. The method of claim 1 , wherein the surface modifier comprises silicon.

20. The method of claim 1 , wherein the surface modifier has a thickness in a range from about 0.1 nanometers to about 20 nanometers.

21. The method of claim 1 , wherein the organic-inorganic composite material has a specific surface area in a range from about 200 square meters per gram to about 400 square meters per gram, when measured using the Brunauer-Emmett-Teller method.

22. The method of claim 1 , wherein the surface modifier is bonded to the surface of the porous material via an —O—Si— bond.

23. The method of claim 2 , wherein the organic-inorganic composite material has a specific surface area in a range from about 200 square meters per gram to about 400 square meters per gram, when measured using the Brunauer-Emmett-Teller method.

24. The method of claim 2 , wherein the surface modifier is bonded to the surface of the porous material via an —O—Si— bond.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Roev Victor
• Im Dong-Min
• Ma Sang-Bok
• Choi Won-Sung
• Park Min-Sik
• Lee Dong-Joon

Classifications

• H01M12/08

  composed of a half-cell of a fuel-cell type and a half-cell of the secondary-cell type · CPC title

• H01M4/8657 Primary

  layered · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M4/8846

  Impregnation · CPC title

• H01M4/8668

  Binders · CPC title