Specific sulfonate compounds that can be used as electrolyte solvent for lithium batteries

Patent metadata

Field	Value
Publication number	US-10040756-B2
Application number	US-201414778487-A
Country	US
Kind code	B2
Filing date	Feb 18, 2014
Priority date	Mar 20, 2013
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

Use of these compounds as electrolyte solvent for lithium batteries.

First claim

The invention claimed is:

1. A composition composed exclusively of a sulfonate compound and at least one lithium salt, said sulfonate compound being of formula (I):

wherein
R 2 is an ethyl group, an n-propyl group or an isopropyl group,
wherein:
when R 2 is an ethyl group, R 1 is an ethyl group, an n-propyl group or an n-butyl group;
when R 2 is an n-propyl group, R 1 is a methyl group, an ethyl group, an n-propyl group or an n-butyl group; and
when R 2 is an isopropyl group, R 1 is a methyl group, an ethyl group, an n-propyl group or an n-butyl group,
wherein the sulfonate compound is an organic solvent of the at least one lithium salt.

2. The composition according to claim 1 , wherein R 2 is an n-propyl group and R 1 is a methyl group.

3. The composition according to claim 1 , wherein R 2 is an n-propyl group and R 1 is an ethyl group.

4. The composition according to claim 1 , wherein R 2 is an ethyl group and R 1 is an ethyl group.

5. The composition according to claim 1 , wherein the lithium salt is at least one selected from the group consisting of LiPF 6 , LiClO 4 , LiBF 4 , LiAsF 6 , LiCF 3 SO 3 , LiN(CF 3 SO 2 ) 3 , LiN(C 2 F 5 SO 2 ), lithium bistrifluoromethylsulfonylimide LiN[SO 2 CF 3 ] 2 and mixtures thereof.

6. A lithium battery comprising an electrochemical cell comprising the composition according to claim 1 , which is an electrolyte, located between a positive electrode and a negative electrode.

7. The lithium battery according to claim 6 , wherein the negative electrode is a material comprising a lithium titanium oxide.

8. The lithium battery according to claim 6 , wherein the positive electrode is a material comprising a material of formula LiMn 2−z Ni z O 4 , where 0<z<2.

9. A sulfonate compound of fonnula (I):

wherein:
R 2 is an ethyl group, an n-propyl group or an isopropyl group,
wherein:
when R 2 is an ethyl group, R 1 is an n-propyl group or an n-butyl group;
when R 2 is an n-propyl group, R 1 is an ethyl group, an n-propyl group or an n-butyl group; and
when R 2 is an isopropyl group, R 1 is an ethyl group, an n-propyl group or an n-butyl group.

10. The sulfonate compound according to claim 9 , wherein R 2 is an n-propyl group and R 1 is an ethyl group.

11. The composition according claim 1 , wherein R 2 is an n-propyl group and R 1 is a methyl group.

12. The composition according to claim 1 , wherein R 2 is an n-propyl group and R 1 is an ethyl group.

13. The composition according to claim 1 , wherein R 2 is an ethyl group and R 1 is an ethyl group.

Assignees

• Renault Sas

Inventors

• Cadra Stephane
• Beord Charlotte
• Pierre Nathalie
• Galiano Herve

Classifications

• H01M10/052

  Li-accumulators · CPC title

• H01M10/0569

  characterised by the solvents · CPC title

• H01M2004/028

  Positive electrodes · CPC title

• H01M4/505

  of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title

• H01M4/485

  of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title