Rechargeable lithium battery

Patent metadata

Field	Value
Publication number	US-9819057-B2
Application number	US-201313830119-A
Country	US
Kind code	B2
Filing date	Mar 14, 2013
Priority date	Sep 7, 2012
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

A rechargeable lithium battery includes a compound represented by Chemical Formula 1:

In Chemical Formula 1, each of k, l, and m is independently an integer of 0 to 20, n is an integer of 1 to 7, and k, l and m are selected such that the compound of Chemical Formula 1 has an asymmetrical structure. The compound of Chemical Formula 1 may be included in the positive electrode, the negative electrode, or the electrolyte of the rechargeable lithium battery.

First claim

What is claimed is:

1. A rechargeable lithium battery, comprising:
a positive electrode;
a negative electrode;
an electrolyte; and
a compound represented by Chemical Formula 1 in at least one of the positive electrode, the negative electrode or the electrolyte:

 wherein:
each of k, l and m is independently an integer of 0 to 20, and each of k, l and m are different from each other such that the compound of Chemical Formula 1 has an asymmetric structure, and
n is an integer of 1 to 7; and

wherein the compound represented by Chemical Formula 1 is present in the positive electrode, the negative electrode or the electrolyte in an amount of about 0.1 to about 10% based on a total weight of the positive electrode, the negative electrode or the electrolyte in which the compound represented by Chemical Formula 1 is present.

2. The rechargeable lithium battery of claim 1 , wherein n is an integer of 1 to 5, and k, l and m are independently integers of 0 to 10.

3. The rechargeable lithium battery of claim 1 , wherein n is an integer of 1 to 3, and k, l and m are independently integers of 0 to 7.

4. The rechargeable lithium battery of claim 1 , wherein n is 1 or 2, k is 0, and l and m are independently integers of 1 to 5.

5. The rechargeable lithium battery of claim 1 , wherein the compound represented by Chemical Formula 1 is 1,3,6-Hexane Tri-Cyanide (1,3,6-tricyanohexane; 1,3,6-HTCN) or 1,2,6-Hexane Tri-Cyanide (1,2,6-tricyanohexane; 1,2,6-HTCN).

6. An electrode composition, comprising:
an electrode active material; and
a compound represented by Chemical Formula 1:

 wherein:
each of k, l and m is independently an integer of 0 to 20, and each has a different value from the other; and k, l and m are selected such that the compound of Chemical Formula 1 has an asymmetric structure, and
n is an integer of 1 to 7, and

wherein the compound represented by Chemical Formula 1 is present in the electrode composition in an amount of about 0.1 to about 10% based on a total weight of the electrode composition.

7. The electrode composition of claim 6 , wherein the electrode active material is a positive active material.

8. The electrode composition of claim 6 , wherein the electrode active material is a negative active material.

9. The electrode composition of claim 6 , wherein n is an integer of 1 to 5, and k, l and m are independently integers of 0 to 10.

10. The electrode composition of claim 6 , wherein n is an integer of 1 to 3, and k, l and m are independently integers of 0 to 7.

11. The electrode composition of claim 6 , wherein n is 1 or 2, k is 0, and l and m are independently integers of 1 to 5.

12. The electrode composition of claim 6 , wherein the compound represented by Chemical Formula 1 is 1,3,6-Hexane Tri-Cyanide (1,3,6-tricyanohexane; 1,3,6-HTCN) or 1,2,6-Hexane Tri-Cyanide (1,2,6-tricyanohexane; 1,2,6-HTCN).

13. An electrolyte composition, comprising:
a solvent;
a lithium salt; and
a compound represented by Chemical Formula 1:

 wherein:
each of k, l and m is independently an integer of 0 to 20, and each of k, l and m are different from each other such that the compound of Chemical Formula 1 has an asymmetric structure, and
n is an integer of 1 to 7, and

wherein the compound represented by Chemical Formula 1 is present in the electrolyte composition in an amount of about 0.1 to about 10% based on a total weight of the electrolyte composition.

14. The electrolyte composition of claim 13 , wherein n is an integer of 1 to 5, and k, l and m are independently integers of 0 to 10.

15. The electrolyte composition of claim 13 , wherein n is an integer of 1 to 3, and k, l and m are independently integers of 0 to 7.

16. The electrolyte composition of claim 13 , wherein n is 1 or 2, k is 0, and l and m are independently integers of 1 to 5.

17. The electrolyte composition of claim 13 , wherein the compound represented by Chemical Formula 1 is 1, 3, 6-Hexane Tri-Cyanide (1,3,6-tricyanohexane; 1, 3, 6-HTCN) or 1, 2, 6-Hexane Tri-Cyanide (1, 2, 6-tricyanohexane; 1, 2, 6-HTCN).

Assignees

• Samsung Sdi Co Ltd

Inventors

• Suh Seung Bum
• Yang Ho-Seok
• Lee Maeng-Eun
• Park Dai-In
• Kang Jee-Won
• Lim Jin-Hyunk
• Hwang Hee-Yeon
• Kim Yun-Hee
• Cheong Kyeong-Beom
• Lee Seon-Hong
• You Ho-Gon
• Kashaev Alexey
• Shin Dae-Yup

Classifications

• H01M10/4235 Primary

  Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence) · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M10/0567 Primary

  characterised by the additives · CPC title

• H01M4/62

  Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title

• H01M2300/0042

  Four or more solvents · CPC title