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

Patent metadata

Field	Value
Publication number	US-2016137597-A1
Application number	US-201414778487-A
Country	US
Kind code	A1
Filing date	Feb 18, 2014
Priority date	Mar 20, 2013
Publication date	May 19, 2016
Grant date	—

Abstract

The invention relates to sulfonate compounds with the following formula (I):

in which:
R 2 represents an ethyl group, an n-propyl group or an isopropyl group; 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; or 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.

Use of these compounds as electrolyte solvent for lithium batteries.

First claim

1 . A sulfonate compound 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, le 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.

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

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

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

5 . A method for preparation of a sulfonate compound of formula (I) according to claim 1 , comprising reacting a hydroxyether compound of formula R 1 —O—CH 2 —CH 2 —OH, R 1 being as defined in claim 1 with an X—SO 2 —R 2 compound, where X is a halogen atom and R 2 being as defined in claim 1 , in a medium comprising a base and one organic solvent.

6 . The compound according to claim 1 , wherein the compound is an organic solvent of a lithium salt.

7 . A composition, comprising a compound according to claim 1 and a lithium salt.

8 . The composition according to claim 7 , 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.

9 . The composition according to claim 7 , wherein the composition is a lithium ion conducting electrolyte.

10 . A lithium battery comprising an electrochemical cell comprising the composition according to claim 9 which is an electrolyte, located between a positive electrode and a negative electrode.

11 . The lithium battery according to claim 10 , wherein the negative electrode is a material comprising a lithium titanium oxide.

12 . The lithium battery according to claim 10 , wherein the positive electrode is a material comprising a material of formula LiMn 2-z Ni z O 4 , where 0<z<2.

Assignees

• Renault Sas

Inventors

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

Classifications

• H01M4/525

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• H01M2004/027

  Negative electrodes · CPC title

• H01M10/0569

  characterised by the solvents · 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