Nonaqueous liquid electrolyte for battery, nonaqueous liquid electrolyte battery, electrolyte for polymer battery and polymer battery

A non-aqueous electrolyte and polymer technology, applied in the direction of non-aqueous electrolyte batteries, non-aqueous electrolyte batteries, organic electrolyte batteries, etc., can solve the problems of high risk of battery rupture, fire, spark ignition, etc., to reduce the risk, risk reduction effect

Active Publication Date: 2007-01-31
BRIDGESTONE CORP
View PDF2 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this aprotic organic solvent has low reactivity with the negative electrode active material lithium, for example, when a polymer battery is short-circuited, a large current passes rapidly, or when the batter

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Nonaqueous liquid electrolyte for battery, nonaqueous liquid electrolyte battery, electrolyte for polymer battery and polymer battery
  • Nonaqueous liquid electrolyte for battery, nonaqueous liquid electrolyte battery, electrolyte for polymer battery and polymer battery
  • Nonaqueous liquid electrolyte for battery, nonaqueous liquid electrolyte battery, electrolyte for polymer battery and polymer battery

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0087] The preparation method of the polymer battery electrolyte of the present invention is not particularly limited. For example, the following preparation method can be mentioned: the above-mentioned polymer and the supporting electrolyte are mixed at a mass ratio (polymer / supporting electrolyte) of 9 / 1. , Add a volatile solvent, mix well, make it uniformly dissolve at about 80°C, heat to about 40°C in a vacuum to volatilize the volatile solvent, and after drying, impregnate and swell aprotic organic solvents with phosphorus and / or nitrogen A mixed solution of the compound to prepare an electrolyte. As the volatile solvent, acetonitrile, alcohols, etc. can be mentioned, and acetonitrile is preferred in view of its excellent solubility.

[0088] As the form of the electrolyte for the polymer battery of the present invention, it is preferable to impregnate and swell a mixed solution of an aprotic organic solvent and a compound containing phosphorus and / or nitrogen in the molecule...

Example Embodiment

[0102] (Example 1)

[0103] Prepared by 50% by volume of ethylene carbonate (EC, boiling point of 238°C), 40% by volume of diethyl carbonate (DEC, boiling point of 127°C), and 5% by volume of additive A [in general formula (II) n is 3,6 R 4 Three of them are methoxy (CH 3 O-), 3 fluorine-containing cyclic phosphazene compounds, viscosity at 25°C: 3.9mPa·s, boiling point 230°C], 5 vol% additive B [in general formula (II) n is 3, 6 R 4 One of them is ethoxy (CH 3 CH 2 O-), 5 cyclic phosphazene compounds that are fluorine, viscosity at 25°C: 1.2mPa·s, boiling point 125°C], dissolve LiPF in the mixed solution 6 (Supporting electrolyte), with a concentration of 1mol / L (M), to prepare a non-aqueous electrolyte. The safety of the obtained non-aqueous electrolyte was evaluated by the following method. The results are shown in Table 1.

[0104] (1) Safety of non-aqueous electrolyte

[0105] The safety of the non-aqueous electrolyte is evaluated according to the burning behavior of the flam...

Example

[0112] (Examples 2-9 and Comparative Examples 1-6)

[0113] Prepare the mixed solution with the ratio shown in Table 1 and Table 2, and dissolve LiPF in the mixed solution 6(Supporting electrolyte), with a concentration of 1mol / L (M), to prepare a non-aqueous electrolyte. In the same manner as in Example 1, the safety of the obtained non-aqueous electrolyte was evaluated. In addition, a non-aqueous electrolyte secondary battery was produced using this non-aqueous electrolyte in the same manner as in Example 1, and a needle stick test and an overcharge test were performed on the battery. The results are shown in Table 1 and Table 2.

[0114] It should be noted that in Table 1 and Table 2, PC means propylene carbonate (boiling point 242°C), DMC means dimethyl carbonate (boiling point 90°C), EMC means ethyl methyl carbonate (boiling point 108°C) MF stands for methyl formate (boiling point 32°C).

[0115] In addition, the additive C is in the general formula (II), n is 4, 8 R 4 All fl...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Viscosityaaaaaaaaaa
Viscosityaaaaaaaaaa
Login to view more

Abstract

PROBLEM TO BE SOLVED: To provide an electrolyte for a polymer battery, capable of reducing a risk of firing and flashing of an aprotic organic solvent remaining inside the battery and an aprotic organic solvent leaking to the outside of the battery, by evaporating or the like when the temperature of the polymer battery abnormally rises.

SOLUTION: This electrolyte for a polymer battery contains one or more kinds of aprotic organic solvents, a polymer and a support electrolyte. The electrolyte is characterized by containing, in each aprotic organic solvent, a compound for which the difference in the boiling point from that of the aprotic organic solvent is below 25°C and which has phosphorus and/or nitrogen in molecules.

COPYRIGHT: (C)2005,JPO&NCIPI

Description

technical field [0001] The present invention relates to a nonaqueous electrolytic solution for batteries, a nonaqueous electrolytic solution battery, an electrolyte for a polymer battery and a polymer battery, in particular to a nonaqueous electrolytic solution for a battery and a polymer battery capable of greatly reducing the risk of sudden fire electrolyte. Background technique [0002] In recent years, as the main power supply or auxiliary power supply of electric vehicles and fuel cell vehicles, or as the power supply of small electronic devices, it is desired to develop batteries that are light, long-lived, and high-energy density. In view of this, since the electrode potential of lithium is the lowest among metals and the capacitance per unit volume is large, the non-aqueous electrolyte battery using lithium as the negative electrode active material is one of the batteries with high energy density. Various types of batteries, such as primary batteries and secondary b...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M10/40H01M6/16H01M6/18H01B1/06H01M10/05H01M10/052H01M10/0565H01M10/0567H01M10/0569
CPCY02E60/122Y02T10/7011Y02E60/10
Inventor 大月正珠荻野隆夫
Owner BRIDGESTONE CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap