Electrolyte for rechargeable lithium battery and rechargeable lithium battery including same

Patent metadata

Field	Value
Publication number	US-2016006076-A1
Application number	US-201514685495-A
Country	US
Kind code	A1
Filing date	Apr 13, 2015
Priority date	Jul 3, 2014
Publication date	Jan 7, 2016
Grant date	—

Abstract

Disclosed are an electrolyte for a rechargeable lithium battery including a lithium salt, organic solvent and an additive including a compound represented by the following Chemical Formula 1 and a rechargeable lithium battery including the same.

In the above Chemical Formula 1, R is the same as described in the detailed description.

First claim

What is claimed is:

1 . An electrolyte for a rechargeable lithium battery, comprising
a lithium salt; an organic solvent; and an additive including a compound represented by the following Chemical Formula 1:

wherein,
R is a substituted or unsubstituted C 1 to C 10 alkylene group, a cyclohexylene group, a phenylene group, or a benzylene group.

2 . The electrolyte for a rechargeable lithium battery of claim 1 , wherein R is the substituted or unsubstituted C 1 to C 10 alkylene group.

3 . The electrolyte for a rechargeable lithium battery of claim 1 , wherein the alkylene group is a substituted or unsubstituted C 1 to C 5 alkylene group.

4 . The electrolyte for a rechargeable lithium battery of claim 1 , wherein the alkylene group is a substituted or unsubstituted C 1 to C 3 alkylene group.

5 . The electrolyte for a rechargeable lithium battery of claim 1 , wherein the additive includes a compound represented by the following Chemical Formula:

6 . The electrolyte for a rechargeable lithium battery of claim 1 , wherein the additive includes a compound represented by the following Chemical Formula:

7 . The electrolyte for a rechargeable lithium battery of claim 1 , wherein the compound represented by the above Chemical Formula 1 is included in an amount of about 0.01 parts by weight to about 5 parts by weight based on 100 parts by weight of the organic solvent.

8 . The electrolyte for a rechargeable lithium battery of claim 1 , wherein the compound represented by the above Chemical Formula 1 is included in an amount of about 0.1 parts by weight to about 3 parts by weight based on 100 parts by weight of the organic solvent.

9 . The electrolyte for a rechargeable lithium battery of claim 1 , wherein the additive further comprises fluoroethylene carbonate, vinylethylene carbonate, propane sultone, propene sultone, succinonitrile, adiponitrile, vinylene carbonate, succinic anhydride, hexanetricarbonitrile, or a combination thereof.

10 . The electrolyte for a rechargeable lithium battery of claim 1 , wherein the organic solvent comprises a carbonate-based compound, an ester-based compound, an ether-based compound, a ketone-based compound, an alcohol-based compound, or a combination thereof.

11 . A rechargeable lithium battery, comprising
a positive electrode; a negative electrode; and an electrolyte comprising: a lithium salt; an organic solvent; and an additive including a compound represented by the following Chemical Formula 1:

wherein,
R is a substituted or unsubstituted C 1 to C 10 alkylene group, a cyclohexylene group, a phenylene group, or a benzylene group.

12 . The rechargeable lithium battery of claim 11 , wherein R is the substituted or unsubstituted C 1 to C 10 alkylene group.

13 . The rechargeable lithium battery of claim 11 , wherein the alkylene group is a substituted or unsubstituted C 1 to C 5 alkylene group.

14 . The rechargeable lithium battery of claim 11 , wherein the compound represented by the above Chemical Formula 1 is included in an amount of about 0.01 parts by weight to about 5 parts by weight based on 100 parts by weight of the organic solvent.

15 . The rechargeable lithium battery of claim 11 , wherein the compound represented by the above Chemical Formula 1 is included in an amount of about 0.1 parts by weight to about 3 parts by weight based on 100 parts by weight of the organic solvent.

16 . The rechargeable lithium battery of claim 11 , wherein the additive further comprises fluoroethylene carbonate, vinylethylene carbonate, propane sultone, propene sultone, succinonitrile, adiponitrile, vinylene carbonate, succinic anhydride, hexanetricarbonitrile, or a combination thereof.

17 . The rechargeable lithium battery of claim 11 , wherein the organic solvent comprises a carbonate-based compound, an ester-based compound, an ether-based compound, a ketone-based compound, an alcohol-based compound, or a combination thereof.

18 . The rechargeable lithium battery of claim 11 , wherein the additive includes a compound represented by the following Chemical Formula:

19 . The rechargeable lithium battery of claim 11 , wherein the additive includes a compound represented by the following Chemical Formula:

20 . The rechargeable lithium battery of claim 11 , wherein the rechargeable lithium battery is operated at a voltage of greater than or equal to about 4.35 V.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Kim Yun-Hee
• Yang Ho-Seok
• Park Young Sam
• Lim Jin-Hyeok
• Hwang Hee-Yeon
• Kim Hyun-Woo
• Park Se-Jeong
• Lee Min-Young

Classifications

• H01M2300/0028

  characterised by the solvent · CPC title

• H01M10/0569

  characterised by the solvents · CPC title

• H01M10/0567 Primary

  characterised by the additives · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M2300/004

  Three solvents · CPC title