Electrolyte additive for lithium battery, electrolyte for lithium battery, and lithium battery including the electrolyte additive

Patent metadata

Field	Value
Publication number	US-2016351963-A1
Application number	US-201615169397-A
Country	US
Kind code	A1
Filing date	May 31, 2016
Priority date	Jun 1, 2015
Publication date	Dec 1, 2016
Grant date	—

Abstract

In an aspect, an electrolyte additive and an electrolyte for a lithium battery and a lithium battery including the electrolyte additive is provided. The electrolyte additive includes a sulfone compound wherein the sulfonyl group is directly bonded to a halide group and an electron withdrawing group.

First claim

What is claimed is:

1 . An electrolyte additive for a lithium battery, the electrolyte additive comprising a sulfone compound wherein the sulfonyl group is directly bonded to a halide and an electron withdrawing group.

2 . The electrolyte additive of claim 1 , wherein the sulfone compound is selected from the group consisting of compounds represented by Formula 1 and Formula 2;

wherein, X is selected from the group consisting of F, Cl, Br, and I
Y 1 is selected from the group consisting of —NCO, —NCS, —OCN, —SCN, —CN, and —NC;
X 1 and X 2 are independently selected from the group consisting of F, Cl, Br, and I;
Y 2 is selected from the group consisting of —N═C═N— and —N═S═N—.

3 . The electrolyte additive of claim 2 , wherein the sulfone compound is selected from the group consisting of:

4 . An electrolyte for a lithium battery, the electrolyte comprising:
a non-aqueous organic solvent; and the electrolyte additive of claim 1 .

5 . The electrolyte of claim 4 , wherein an amount of the sulfone compound as an electrolyte additive is in a range of about 0.001 wt % to about 10 wt % based on a total weight of the electrolyte.

6 . The electrolyte of claim 4 , wherein an amount of the sulfone compound as an electrolyte additive is in a range of about 0.0015 wt % to about 5 wt % based on a total weight of the electrolyte.

7 . The electrolyte of claim 4 , the electrolyte further comprising a lithium salt.

8 . The electrolyte of claim 4 , wherein the non-aqueous solvent is selected from the group consisting of a carbonate-based compound, an ester-based compound, an ether-based compound, a ketone-based compound, an alcohol-based compound, and an aprotic solvent.

9 . The non-aqueous solvent of claim 8 , wherein the carbonate-based compound is selected from the group consisting of a cyclic carbonate-based compound, acyclic carbonate-based compound, and a mixture of the cyclic and acyclic carbonate-based compound.

10 . The non-aqueous solvent of claim 9 , wherein the acyclic carbonate-based compound is selected from the group consisting of diethyl carbonate (DEC), dimethyl carbonate (DMC), dipropyl carbonate (DPC), methyl propyl carbonate (MPC), ethyl propyl carbonate (EPC), and ethyl methyl carbonate (EMC).

11 . The non-aqueous solvent of claim 9 , wherein the cyclic carbonate-based compound is selected from the group consisting of ethylene carbonate (EC), propylene carbonate (PC), butylene carbonate (BC), and vinyl ethylene carbonate (VEC).

12 . The non-aqueous solvent of claim 9 , wherein the cyclic carbonate-based compound and acyclic carbonate-based compound are mixed together in a volume ratio of about 1:1 to about 1:9.

13 . A lithium battery comprising:
a cathode; an anode; and the electrolyte of claim 4 between the cathode and the anode.

14 . A lithium battery according to claim 13 , comprising the electrolyte wherein an amount of the sulfone compound as an electrolyte additive is in a range of about 0.001 wt % to about 10 wt % based on a total weight of the electrolyte.

15 . A lithium battery according to claim 13 , comprising the electrolyte wherein the electrolyte further comprises a lithium salt.

16 . A lithium battery according to claim 13 , comprising the electrolyte wherein the non-aqueous solvent is selected from the group consisting of a carbonate-based compound, an ester-based compound, an ether-based compound, a ketone-based compound, an alcohol-based compound, and an aprotic solvent.

17 . A lithium battery according to claim 13 , comprising the electrolyte wherein the carbonate-based compound is selected from the group consisting of a cyclic carbonate-based compound, acyclic carbonate-based compound, and a mixture of the cyclic and acyclic carbonate-based compound.

18 . A lithium battery according to claim 13 , comprising the electrolyte wherein the acyclic carbonate-based compound is selected from the group consisting of diethyl carbonate (DEC), dimethyl carbonate (DMC), dipropyl carbonate (DPC), methyl propyl carbonate (MPC), ethyl propyl carbonate (EPC), and ethyl methyl carbonate (EMC).

19 . A lithium battery according to claim 13 , comprising the electrolyte wherein the cyclic carbonate-based compound is selected from the group consisting of ethylene carbonate (EC), propylene carbonate (PC), butylene carbonate (BC), and vinyl ethylene carbonate (VEC).

20 . A lithium battery according to claim 13 , comprising the electrolyte wherein the cyclic carbonate-based compound and acyclic carbonate-based compound are mixed together in a volume ratio of about 1:1 to about 1:9.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Shatunov Pavel Alexandrovich
• Kim Soojin
• Lee Seungtae
• Lee Minju
• Shin Woocheol

Classifications

• H01M10/0569

  characterised by the solvents · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M10/0567 Primary

  characterised by the additives · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M10/0568

  characterised by the solutes · CPC title