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Nonaqueous electrolyte solution for secondary batteries and lithium ion secondary battery

A non-aqueous electrolyte and secondary battery technology, applied in the direction of non-aqueous electrolyte batteries, secondary batteries, non-aqueous electrolytes, etc., can solve problems such as battery fire, achieve sufficient ionic conductivity, excellent high-voltage cycle characteristics and high The effect of voltage high temperature storage characteristics

Inactive Publication Date: 2015-02-04
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, carbonate-based solvents are flammable and may catch fire due to heat generation of the battery, etc.

Method used

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  • Nonaqueous electrolyte solution for secondary batteries and lithium ion secondary battery
  • Nonaqueous electrolyte solution for secondary batteries and lithium ion secondary battery
  • Nonaqueous electrolyte solution for secondary batteries and lithium ion secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0195] The present invention will be described in detail through examples below, but the present invention is not limited by the following description. Examples 1 to 23 are production examples, Examples 24 to 33, 44 to 47, and 49 to 52 are examples, and Examples 34 to 43, 48, and 53 are comparative examples.

[0196]

example 1

[0198] A preparation containing 43 vol% fluoroethylene carbonate (compound (3), FEC), 32 vol% 1,3-propane sultone (PS), and 25 vol% CF 3 CH 2 OCF 2 CHF 2 (HFF1) A liquid composition in which LiPF is dissolved at a concentration of 1M 6 , to prepare non-aqueous electrolyte solution 1.

example 2～23

[0200] Nonaqueous electrolytic solutions 2 to 23 were prepared in the same manner as in Example 1 except that the composition of the liquid composition was changed to that shown in Table 1.

[0201] [Table 1]

[0202] Unit: volume %

[0203]

non-aqueous electrolyte

HFE1

HFE2

HFE3

FEC

P.S.

EC

EMC

DMC

DEC

example 1

1

25

-

-

43

32

-

-

-

-

Example 2

2

27

-

-

57

16

-

-

-

-

Example 3

3

31

-

-

57

12

-

-

-

-

Example 4

4

16

-

-

43

32

-

-

9

-

Example 5

5

15

-

-

57

16

-

-

-

12

Example 6

6

18

-

-

57

16

-

-

9

-

Example 7

7

18

-

-

57

8

-

-

17

-

Example 8

8

-

31

-

57

12

-

-

- ...

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Abstract

The object is to provide a non-aqueous electrolyte solution for secondary batteries, which has sufficient ion conductivity and which is provided also with excellent high voltage cycle properties and high voltage high temperature preserving properties, and a lithium ion secondary battery employing such a non-aqueous electrolyte solution. A non-aqueous electrolyte solution for secondary batteries, comprising a lithium salt and a liquid composition, wherein the liquid composition comprises from 5 to 50 vol % of a specific fluorinated ether compound, from 5 to 70 vol % of a specific fluorinated cyclic carbonate compound, and from 1 to 35 vol % of a specific sultone compound, and a lithium ion secondary battery employing such a non-aqueous electrolyte solution.

Description

technical field [0001] The invention relates to a nonaqueous electrolytic solution for a secondary battery and a lithium ion secondary battery. Background technique [0002] In non-aqueous electrolyte solutions used in lithium-ion secondary batteries (hereinafter sometimes simply referred to as "secondary batteries"), generally from the viewpoint of exhibiting high ion conductivity by dissolving lithium salt well and having a wide potential window , carbonate-based solvents such as ethylene carbonate and dimethyl carbonate are widely used. However, carbonate-based solvents are flammable and may catch fire due to heat generation of the battery or the like. [0003] Therefore, in order to improve the incombustibility (flame retardancy) of the non-aqueous electrolytic solution, it has been proposed to use a fluorine-based solvent. In addition, the use of fluorine-containing cyclic carbonate compounds has also been proposed for the purpose of improving cycle characteristics an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0569H01M10/052H01M10/0525H01M10/0567H01M10/0568
CPCH01M2300/0034H01M6/164H01M2300/004H01M10/0569Y02T10/7011H01M10/0525H01M2300/0042Y02E60/10Y02T10/70
Inventor 岩谷真男小野崎祐
Owner ASAHI GLASS CO LTD
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