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

Patent metadata

Field	Value
Publication number	US-9947933-B2
Application number	US-201414185154-A
Country	US
Kind code	B2
Filing date	Feb 20, 2014
Priority date	Feb 21, 2013
Publication date	Apr 17, 2018
Grant date	Apr 17, 2018

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. An air battery cathode comprising:
an organic-inorganic composite material comprising surface modified nanopores, the organic-inorganic composite material comprising
a porous material, wherein the porous material is a porous metal oxide, and
a surface modifier on a surface of a nanopore of the porous material; and

a binder.

2. The cathode of claim 1 , wherein the pores of the porous material are ordered.

3. The cathode of claim 1 , wherein the pores of the porous material have a periodic pore structure, and a contact angle between a surface of the organic-inorganic composite material and water is greater than about 90°, wherein the contact angle is determined using water and at a temperature of 20° C.

4. The cathode of claim 1 , wherein the composite material has an average pore size in a range from about 3 nanometers to about 50 nanometers.

5. The cathode of claim 4 , wherein the composite material has a peak in a pore size distribution of the composite material in a range from about 3 nanometers to about 50 nanometers, and 75% of the pores have a size of about 3 nanometers to about 50 nanometers.

6. The cathode of claim 4 , wherein an amount of the surface modifier may be about 2 weight percent to about 50 weight percent, based on a total weight ofthe organic-inorganic composite material.

7. The cathode of claim 1 , wherein the composite material has an average pore size in a range from about 3 nanometers to about 15 nanometers.

8. The cathode of claim 1 , wherein the composite material is in a form of particles.

9. The cathode of claim 1 , wherein the surface modifier is disposed on at least a portion of the surface of the nanopore of the porous metal oxide.

10. The cathode of claim 9 , wherein the metal oxide comprises at least one element of Groups 3 to 14 of the Periodic Table.

11. The cathode of claim 9 , wherein the metal oxide comprises at least one of Mg, Al, Si, P, Ca, Ti, V, Ga, Ge, Sr, Zr, Nb, Mo, In, Sn, Hf, Ta, or W.

12. The cathode of claim 9 , wherein the surface modifier is chemically bonded to the porous metal oxide.

13. The cathode of claim 9 , wherein the surface modifier comprises an organic compound which is bonded to the surface of the pores of the porous metal oxide.

14. The cathode of claim 1 , wherein the surface modifier comprises F, Cl, Br, I, or a combination comprising at least one of the foregoing.

15. The cathode of claim 1 , wherein the surface modifier comprises silicon.

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

17. The cathode of claim 1 , wherein the composite material is contained in an amount in a range from about 1 weight percent to about 20 weight percent, based on a total weight of the cathode.

18. A lithium air battery comprising:
an anode capable of absorbing and desorbing lithium ions;
the air battery cathode according to claim 1 ; and
an electrolyte disposed between the anode and the cathode.

19. The cathode of claim 1 , wherein, when contacted with an electrolyte, the surface modifier is not impregnated by the electrolyte.

20. The cathode of claim 1 , wherein the porous metal oxide comprises SiO 2 , TiO 2 , NiO, PbO 2 , CoO 2 , Co 3 O 4 , Mn 2 O 3 , MnO 2 , MnO, GeO 2 , BaTiO 3 , zeolite, Al 2 O 3 , ZnO, or a combination thereof.

21. The cathode of claim 1 , wherein a contact angle between a surface of the organic-inorganic composite material and water is greater than about 90°, wherein the contact angle is determined using water and at a temperature of 20° C.

Assignees

• Samsung Electronics Co Ltd

Inventors

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

Classifications

• H01M4/8846

  Impregnation · CPC title

• H01M4/8657 Primary

  layered · CPC title

• H01M4/9016

  Oxides, hydroxides or oxygenated metallic salts · CPC title

• H01M2220/20

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

• H01M12/08

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