Non-aqueous electrolytic solution and non-aqueous electrolyte secondary battery using the same

Patent metadata

Field	Value
Publication number	US-2016294008-A1
Application number	US-201615185855-A
Country	US
Kind code	A1
Filing date	Jun 17, 2016
Priority date	Dec 18, 2013
Publication date	Oct 6, 2016
Grant date	—

Abstract

A task is to provide a non-aqueous electrolytic solution exhibiting excellent cycle capacity maintaining ratio and excellent low-temperature resistance characteristics and a non-aqueous electrolyte secondary battery using the same. An object of the present invention is to provide a non-aqueous electrolytic solution which improves the cycle capacity maintaining ratio and low-temperature resistance characteristics, and a non-aqueous electrolyte secondary battery using the non-aqueous electrolytic solution. The present invention is a non-aqueous electrolytic solution comprising an electrolyte and a non-aqueous solvent dissolving therein the electrolyte, wherein the non-aqueous electrolytic solution contains a compound represented by formula (1) (wherein X represents an organic group containing a heteroatom, Y represents a sulfur atom, a phosphorus atom, or a carbon atom, n represents an integer of 1 or 2, m represents an integer of 2 to 4, 1 represents an integer of 1 or 2, and Z represents an organic group having 4 to 12 carbon atoms and optionally having a heteroatom), and a non-aqueous electrolyte secondary battery comprising the non-aqueous electrolytic solution.

First claim

1 . A non-aqueous electrolytic solution comprising an electrolyte and a non-aqueous solvent dissolving therein the electrolyte, the non-aqueous electrolytic solution containing at least one compound represented by the following formula (1):

wherein:
X represents an organic group containing a heteroatom, the organic group having at least one oxygen atom as the heteroatom,
Y represents a sulfur atom, a phosphorus atom, or a carbon atom,
n represents an integer of 1 or 2, m represents an integer of 2 to 4, and 1 represents an integer of 1 or 2, and
Z represents an organic group having 4 to 12 carbon atoms and optionally having a heteroatom.

2 . The non-aqueous electrolytic solution according to claim 1 , wherein the X is an organic group containing a carbonyl group.

3 . The non-aqueous electrolytic solution according to claim 1 , wherein the Y is a sulfur atom.

4 . The non-aqueous electrolytic solution according to claim 1 , wherein the Z is an alkylene group having 4 to 6 carbon atoms.

5 . The non-aqueous electrolytic solution according to claim 1 , wherein the at least one compound represented by the formula (1) is contained in an amount of 0.01 to 5% by mass, based on the mass of the non-aqueous electrolytic solution (100% by mass).

6 . The non-aqueous electrolytic solution according to claim 1 , which further contains a cyclic carbonate having an unsaturated bond.

7 . A non-aqueous electrolyte secondary battery comprising a negative electrode and a positive electrode each being capable of having occluded therein and releasing metal ions, and the non-aqueous electrolytic solution according to claim 1 .

8 . The non-aqueous electrolyte secondary battery according to claim 7 , wherein the positive electrode capable of having occluded therein and releasing metal ions comprises at least one layer transition metal oxide.

9 . The non-aqueous electrolyte secondary battery according to claim 7 , wherein the negative electrode capable of having occluded therein and releasing metal ions comprises at least one carbon compound.

10 . A method for producing a sulfonic ester represented by the following formula (10):

wherein:
W represents an organic group containing a heteroatom, the organic group having at least one oxygen atom as the heteroatom,
m represents an integer of 2 to 4, and
Z represents an organic group having 4 to 12 carbon atoms and optionally having a heteroatom,
the method comprising the steps of:
reacting a sulfonyl chloride represented by the following formula (11):

wherein Z and m are as defined for the formula (10)
and a compound having an alcoholic hydroxyl group and being represented by the following formula (12):
W—OH  (12)

wherein W is as defined for the formula (10)
with each other; and
taking out a sulfonic ester represented by the formula (10) in the form of a solid by crystal deposition.

11 . The method for producing a sulfonic ester according to claim 10 , wherein the crystal deposition is conducted by reducing the temperature of a solution containing the sulfonic ester represented by the formula (10).

12 . The method for producing a sulfonic ester according to claim 11 , wherein the solution containing the sulfonic ester represented by the formula (10) is a methanol solution.

13 . The method for producing a sulfonic ester according to claim 10 , wherein the crystal deposition is conducted under temperature conditions at 20° C. or lower.

14 . The method for producing a sulfonic ester according to claim 10 , wherein Z in the formula (10) is an organic group having a linear structure.

15 . The method for producing a sulfonic ester according to claim 10 , wherein the sulfonyl chloride represented by the formula (11) is represented by the following formula (21):

wherein p represents an integer of 4 to 6.

16 . The method for producing a sulfonic ester according to claim 10 , wherein the compound having an alcoholic hydroxyl group and being represented by the formula (12) is represented by the following formula (22):

wherein:
R a independently represents an alkyl group having 1 to 4 carbon atoms, and
R b independently represents an alkyl group having 1 to 4 carbon atoms.

17 . The method for producing a sulfonic ester according to claim 10 , wherein the compound having an alcoholic hydroxyl group and being represented by the formula (12) is glycerol carbonate.

18 . A compound which is represented by the following formula (20):

wherein:
R a each occurrence independently represents an alkyl group having 1 to 4 carbon atoms,
R b each occurrence independently represents an alkyl group having 1 to 4 carbon atoms, and
p represents an integer of 4 to 6.

19 . A compound which is represented by the following formula (30):

wherein p represents an integer of 4 to 6.

Assignees

• Mitsubishi Chem Corp

Inventors

• Yoshida Hiroaki
• Kawakami Daisuke
• Fukamizu Koji

Classifications

• C07C309/65

  of a saturated carbon skeleton · CPC title

• H01M2300/0017

  Non-aqueous electrolytes · CPC title

• H01M10/0569

  characterised by the solvents · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M2300/0025

  Organic electrolyte · CPC title