Protected anode for lithium air battery and lithium air battery including the same

Patent metadata

Field	Value
Publication number	US-9312583-B2
Application number	US-201313870646-A
Country	US
Kind code	B2
Filing date	Apr 25, 2013
Priority date	Dec 21, 2012
Publication date	Apr 12, 2016
Grant date	Apr 12, 2016

Abstract

A protected anode for lithium air batteries and a lithium air battery including the protected anode are provided. The protected anode includes: an anode intercalates and deintercalates lithium ions; a lithium ion-conductive solid electrolyte membrane; and a polymer electrolyte disposed between the anode and the ion-conductive solid electrolyte membrane, wherein the polymer electrolyte includes a lithium ion-conductive polymer, a compound represented by Formula 1 having a number average molecular weight from about 300 to about 1,000, and a lithium salt, and an amount of the compound of Formula 1 is from about 10 parts to about 25 parts by weight based on 100 parts by weight of the polymer electrolyte:

In Formula 1, R 1 to R 6 , and n are the same as defined in the specification.

First claim

What is claimed is:

1. A protected anode for a lithium air battery comprising:
an anode;
a lithium ion-conductive solid electrolyte membrane; and
a polymer electrolyte disposed between the anode and the ion-conductive solid electrolyte membrane,
wherein the polymer electrolyte comprises a lithium ion-conductive polymer, a compound represented by Formula 1 having a number average molecular weight from about 300 to about 1,000, and a lithium salt, and an amount of the compound of Formula 1 is from about 10 parts to about 25 parts by weight based on 100 parts by weight of the polymer electrolyte:

wherein, in Formula 1, R 1 and R 6 are each independently a hydrogen atom, a substituted or unsubstituted C1-C30 alkyl group, a substituted or unsubstituted C6-C30 aryl group, substituted or unsubstituted C3-C30 heteroaryl group, or a substituted or unsubstituted C3-C20 carbocyclic group;
R 2 to R 5 are each independently a hydrogen atom, a nitro group, an amino group, a hydroxy group, a halogen atom, a cyano group, a carboxyl group, a substituted or unsubstituted C1-C30 alkyl group, a substituted or unsubstituted C2-C30 alkenyl group, a substituted or unsubstituted C2-C30 alkynyl group, a substituted or unsubstituted C1-C30 alkoxy group, a substituted or unsubstituted C2-C30 alkoxycarbonyl group, a substituted or unsubstituted C6-C30 aryl group, a substituted or unsubstituted C3-C20 carbocyclic group, a substituted or unsubstituted C3-C30 heteroaryl group, a substituted or unsubstituted C2-C30 alkylcarbonyl group, a substituted or unsubstituted C7-C30 arylcarbonyl group, or a substituted or unsubstituted C4-C30 heteroarylcarbonyl group; and
n is from about 5 to about 22.

2. The protected anode of claim 1 , wherein R 1 and R 6 in Formula 1 are each independently a hydrogen atom or a C1-C10 alkyl group, and R 2 to R 5 are each independently a hydrogen atom or a C1-C10 alkyl group.

3. The protected anode of claim 1 , wherein the compound of Formula 1 is CH 3 O—(CH 2 CH 2 O) 10 —CH 3 , CH 3 O—(CH 2 CH 2 O) 11 —CH 3 , CH 3 O—(CH 2 CH 2 O) 12 —CH 3 , CH 3 O—(CH 2 CH 2 O) 13 —CH 3 , CH 3 O—(CH 2 CH 2 O) 14 —CH 3 , CH 3 O—(CH 2 CH 2 O) 15 —CH 3 , CH 3 O—(CH 2 CH 2 O) 16 —CH 3 , CH 3 O—(CH 2 CH 2 O) 17 —CH 3 , CH 3 O—(CH 2 CH 2 O) 18 —CH 3 , CH 3 O—(CH 2 CH 2 O) 19 —CH 3 , CH 3 O—(CH 2 CH 2 O) 20 —CH 3 , or CH 3 O—(CH 2 CH 2 O) 21 —CH 3 .

4. The protected anode of claim 1 , wherein an amount of the lithium ion-conductive polymer is from about 10 parts to about 68 parts by weight based on 100 parts by weight of the polymer electrolyte.

5. The protected anode of claim 1 , wherein the lithium ion-conductive polymer is at least one selected from an alkylene oxide polymer, a hydrophilic acrylic polymer, and a hydrophilic methacrylic polymer.

6. The protected anode of claim 1 , wherein the lithium ion-conductive polymer is at least one selected from polypropylene oxide, polyethylene oxide, and a polyethylene oxide/polypropylene oxide copolymer.

7. The protected anode of claim 1 , wherein an amount of the lithium salt is from about 15 parts to about 70 parts by weight based on 100 parts by weight of the polymer electrolyte.

8. The protected anode of claim 1 , wherein the polymer electrolyte has a thickness from about 5 μm to about 150 μm.

9. The protected anode of claim 1 , wherein the lithium salt is at least one selected from LiPF 6 , LiBF 4 , LiSbF 6 , LiAsF 6 , LiN(SO 2 C 2 F 5 ) 2 , Li(CF 3 SO 2 ) 2 N, LiC 4 F 9 SO 3 , LiClO 4 , LiAlO 2 , LiAlCl 4 , LiN(C x F 2x+1 SO 2 )(C y F 2y+1 SO 2 ) where x and y are natural numbers, LiF, LiBr, LiCl, LiOH, LiI, and LiB(C 2 O 4 ) 2 .

10. The protected anode of claim 1 , wherein the lithium ion-conductive solid electrolyte membrane comprises at least one selected from an inorganic material and a polymer solid electrolyte.

11. The protected anode of claim 1 , wherein the lithium ion-conductive solid electrolyte membrane is a glass-ceramic solid electrolyte, or a laminated structure of a glass-ceramic solid electrolyte and a polymer solid electrolyte.

12. The protected anode of claim 1 , wherein the polymer electrolyte membrane further comprises at least one selected from a metal salt selected from AlCl 3 , MgCl 2 , NaCl, KCl, NaBr, KBr, and CaCl 2 .

13. A lithium air battery comprising the protected anode of claim 1 , an electrolyte, and a cathode.

14. The lithium air battery of claim 13 , wherein the electrolyte comprises a lithium salt and a non-aqueous solvent.

15. The lithium air battery of claim 13 , wherein the cathode comprises a porous carbonaceous material.

16. The lithium air battery of claim 13 , wherein the protected anode comprises:
an anode that intercalates and deintercalates lithium ions;
a lithium ion-conductive solid electrolyte membrane; and
a polymer electrolyte disposed between the anode and the ion-conductive solid electrolyte membrane,
wherein the polymer electrolyte comprises a polyethyleneglycol dimethylether CH 3 O—(CH 2 CH 2 O) n —CH 3 where n is 10; polyethylene oxide as a lithium ion-conductive polymer; and lithium bis(trifluoromethanesulfonyl)imide as a lithium salt.

Assignees

• Samsung Electronics Co Ltd
• Nat Univ Corp Mie Univ

Inventors

• Lee Dong-Joon
• Im Dong-Min
• Roev Victor
• Ma Sang-Bok
• Park Min-Sik
• Yamamoto Osamu
• Imanishi Nobuyuki
• Choi Won-Sung
• Takeda Yasuo

Classifications

• H01M10/0562

  Solid materials · CPC title

• H01M10/0565

  Polymeric materials, e.g. gel-type or solid-type · CPC title

• H01M2300/0094

  in the form of layered products, e.g. coatings · CPC title

• H01M10/0568

  characterised by the solutes · CPC title

• H01M12/08 Primary

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