Nonaqueous electrolyte solution for battery and nonaqueous electrolyte battery comprising the same

A non-aqueous electrolyte and battery technology, applied to secondary batteries, circuits, electrical components, etc., to achieve excellent battery performance, excellent discharge performance, and high safety effects

Inactive Publication Date: 2010-03-24
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] As described above, in order to improve the safety of batteries, it is important to impart nonflammability to the electrolyte and to improve the heat resistance of battery electrode materials, but it cannot be said that the conventional technology has a satisfactory level of accomplishing these things at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] By adding LiPF 6 Dissolve in the mixed solvent with the concentration of 1mol / L to prepare non-aqueous electrolytic solution, this mixed solvent is the cyclic phosphazene compound of 30 volume % methyl butyrate, 30 volume % general formula (I) (n is 3, all One of R is cyclohexyloxy and the remaining five are fluoro), 13 vol% ethylene carbonate and 27 vol% dimethyl carbonate. Then, the flame retardancy of the non-aqueous electrolytic solution thus obtained was evaluated by the following method (1), whereby the results shown in Table 1 were obtained.

[0046] (1) Evaluation of flame retardancy

[0047] The burning length and burning time of the flame ignited in the atmospheric environment were measured and evaluated according to the method of laying out the UL94HB method of the UL (Underwriting Laboratory) standard. Specifically, based on the UL test standard, the 127mm×12.7mm SiO 2 The sheet was impregnated with 1.0 mL of the electrolytic solution to prepare a test pi...

Embodiment 2

[0060] By adding LiPF 6 Dissolve in mixed solvent with the concentration of 1.0mol / L to prepare non-aqueous electrolytic solution, this mixed solvent is the cyclic phosphazene compound (wherein n is 3) of 70 volume % methyl propionate, 5 volume % general formula (I) , two of all R are methoxy and the remaining four are fluorine) and 25% by volume of a cyclic phosphazene compound of general formula (I) (wherein n is 3, one of all R is phenoxy and the rest Five are fluorine), and the flame retardancy of the non-aqueous electrolytic solution thus obtained was evaluated. In addition, a nonaqueous electrolyte secondary battery was produced in the same manner as in Example 1, and the load characteristics and heat resistance of the positive electrode were respectively evaluated. The results are shown in Table 1.

Embodiment 3

[0062] By adding LiPF 6 Dissolve in mixed solvent with the concentration of 1.0mol / L to prepare non-aqueous electrolytic solution, this mixed solvent is the cyclic phosphazene compound (wherein n is 3, Two of all R are bonded to propylenedioxy and the remaining four are fluorine), 30% by volume of a cyclic phosphazene compound of general formula (I) (wherein n is 4 and one of all R is ethyl oxygen group and the remaining seven being fluorine), 10% by volume of ethylene carbonate and 10% by volume of ethyl methyl carbonate, and the flame retardancy of the nonaqueous electrolytic solution thus obtained was evaluated. In addition, a nonaqueous electrolyte secondary battery was fabricated in the same manner as in Example 1, and the load characteristics and heat resistance of the positive electrode were respectively evaluated. The results are shown in Table 1.

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Abstract

This invention relates to a non-aqueous electrolyte for a battery having high flame retardance and capable of giving high heat resistance to a positive electrode material of a battery, and more particularly to a non-aqueous electrolyte for a battery characterized by comprising a non-aqueous solvent containing a cyclic phosphazene compound represented by the following general formula (I): (NPR 2 )n (I) ¢wherein Rs are independently fluorine, an alkoxy group or an aryloxy group; and n is 3-4! and at least one methyl ester compound selected from the group consisting of methyl acetate, methyl propionate and methyl butyrate, and a support salt.

Description

technical field [0001] The present invention relates to non-aqueous electrolytic solutions for batteries and non-aqueous electrolytic solution batteries comprising the same, more particularly to non-aqueous electrolytic solutions for batteries that have high flame retardancy and can provide battery positive electrode materials with high heat resistance, and have Excellent battery performance and a nonaqueous electrolyte battery comprising a positive electrode with high heat resistance. Background technique [0002] The non-aqueous electrolytic solution is used as an electrolytic solution for a lithium battery, a lithium ion secondary battery, an electric double layer capacitor, or the like. These devices have high voltage and high energy density, so they are widely used as driving power sources for personal computers, mobile phones, and the like. As a non-aqueous electrolyte, it is usually used by adding a supporting salt such as LiPF 6 etc. are those obtained by dissolvin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/40H01M10/0569
CPCH01M10/0567Y02E60/122H01M10/4235H01M10/056H01M10/0569H01M10/0525Y02E60/10
Inventor 堀川泰郎
Owner BRIDGESTONE CORP
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