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

Patent metadata

Field	Value
Publication number	US-2018198134-A1
Application number	US-201815915210-A
Country	US
Kind code	A1
Filing date	Mar 8, 2018
Priority date	Feb 21, 2013
Publication date	Jul 12, 2018
Grant date	—

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 lyophobic layer on the surface of the porous material to manufacture the organic-inorganic composite material.

2 . The method of claim 1 , wherein the chemically bonding is performed at a temperature of 40° C. or higher.

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 porous material is a porous metal oxide, and the reactive compound is a silane.

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

6 . The method of claim 1 , wherein the lyophobic layer 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 the lyophobic layer has a contact angle of 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 lyophobic layer 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 is a porous metal oxide, and the lyophobic layer is disposed on at least a portion of the lyophobic nanopores of the porous metal oxide.

15 . The method of claim 14 , wherein the metal oxide comprises an element of Groups 3 to 14 of the Periodic Table.

16 . The method of claim 14 , wherein the metal oxide 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 14 , wherein the lyophobic layer comprises an organic compound which is bonded to the surface of the pores of the porous metal oxide.

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

19 . The method of claim 1 , wherein the lyophobic layer comprises silicon.

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

Assignees

• Samsung Electronics Co Ltd

Inventors

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

Classifications

• H01M4/8657 Primary

  layered · 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

• H01M2220/20

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

• H01M4/8846

  Impregnation · CPC title

• H01M4/9016

  Oxides, hydroxides or oxygenated metallic salts · CPC title