Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Additive for non-aqueous liquid electrolyte, non-aqueous liquid electrolyte secondary cell and non-aqueous liquid electrolyte electric double layer capacitor

A technology for electrolyte additives and electric double-layer capacitors, which is applied in the direction of non-aqueous electrolyte batteries, non-aqueous electrolyte batteries, electrolytic capacitors, etc., and can solve safety problems, non-aqueous electrolyte fire, and the danger of electrolyte flame burning expansion sexuality issues

Inactive Publication Date: 2005-03-09
BRIDGESTONE CORP
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, the above-mentioned non-aqueous electrolytic solution has problems in terms of safety, just like the non-aqueous electrolytic solution of storage batteries.
That is to say, if the non-aqueous electrolyte electric double layer capacitor catches fire due to heat, the electrolyte catches fire, and the flame expands on the surface of the electrolyte, thereby increasing the danger.
And, for the heat generation of the non-aqueous electrolyte electric double layer capacitor, the non-aqueous electrolyte based on the above-mentioned organic solvent gasifies and decomposes to generate gas, because the generated gas causes the rupture of the non-aqueous electrolyte electric double layer capacitor, and , because the ignition point of the solvent of the non-aqueous electrolyte is very low, when a fire occurs, the non-aqueous electrolyte catches fire, and the risk of flame burning on the surface of the electrolyte is high

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
  • Additive for non-aqueous liquid electrolyte, non-aqueous liquid electrolyte secondary cell and non-aqueous liquid electrolyte electric double layer capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0191] [Preparation of non-aqueous electrolyte solution]

[0192] Add (20 % by weight) phosphazene derivative 20g (in the above general formula (1), R is a methoxyl group, n is a cyclic phosphazene derivative of 3) (non-aqueous electrolyte additive), and then LiBF 4 (Supporting salt) was dissolved at a concentration of 0.75 mol / kg to prepare a non-aqueous electrolyte (25°C viscosity: 8.2mPa·s (8.2cP), conductivity of 0.75mol / l lithium salt solution: 6.5mS / cm) .

[0193] In addition, the above-mentioned viscosity and electrical conductivity were measured by the above-mentioned measuring methods, respectively.

[0194]

[0195] The obtained non-aqueous electrolytic solution was evaluated as follows in the same manner as the above-mentioned evaluation method of self-extinguishing property and flame retardancy, and the results are shown in Table 1.

[0196] "Evaluation of incombustibility"

[0197] The ignited flame does not reach 25mm of the device, and it is not considered...

Embodiment 2

[0217] In the "preparation of non-aqueous electrolytic solution" of Example 1, except for 70 g of a mixed solvent of diethyl carbonate and ethane carbonate, and 30 g (30% by weight) of a phosphazene derivative, it is the same as in Example 1 Non-aqueous electrolyte solution (viscosity at 25°C: 9.7mPa·s (9.7cP), conductivity of 0.75mol / l lithium salt solution: 5.8mS / cm), self-extinguishing property, non-combustibility, and degradation resistance sexual evaluation. Furthermore, non-aqueous electrolyte storage batteries were prepared in the same manner as in Example 1, and the initial battery characteristics (voltage, internal resistance), charge-discharge cycle performance, and low-temperature characteristics were measured and evaluated, respectively. The results are shown in Table 1.

Embodiment 3

[0219]In the "preparation of non-aqueous electrolytic solution" of Example 1, in addition to 94.5 g of mixed solvents of diethyl carbonate and ethane carbonate, 5.5 g (5.5% by weight) of phosphazene derivatives, and LiPF 5 In place of the supporting salt, prepare the same non-aqueous electrolyte solution as in Example 1 (the viscosity at 25°C is 3.7mPa·s (3.7cP), the conductivity of the lithium salt solution of 0.75mol / l: 7.4mS / cm), Evaluations were performed from self-extinguishing properties to incombustibility and deterioration resistance. Furthermore, non-aqueous electrolyte storage batteries were prepared in the same manner as in Example 1, and the initial battery characteristics (voltage, internal resistance), charge-discharge cycle performance, and low-temperature characteristics were measured and evaluated, respectively. The results are shown in Table 1.

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
viscosityaaaaaaaaaa
viscosityaaaaaaaaaa
electrical conductivityaaaaaaaaaa
Login to View More

Abstract

The present invention provides an additive for a non-aqueous electrolytic solution including a phosphazene derivative which is solid at 25 DEG C and represented by the following formula (1): (PNR2)n wherein R represents a monovalent substituent or a halogen atom; and n represents a number of 3 to 6. More particularly, the present invention provides a non-aqueous electrolytic solution secondary cell and a non-aqueous electrolytic solution electric double layer capacitor which contain the additive for the non-aqueous electrolytic solution, which have excellent self-extinguishability or flame retardancy, and resistance to deterioration, and which have low internal resistance and excellent conductivity due to low viscosity of the non-aqueous electrolytic solution.

Description

technical field [0001] The present invention relates to additives added to non-aqueous electrolytes such as non-aqueous electrolyte storage batteries, non-aqueous electrolyte electric double-layer capacitors, etc., and furthermore, to containing the above-mentioned additives, having excellent self-extinguishing properties to incombustibility, and excellent resistance to inferiority, Moreover, due to the low viscosity of the non-aqueous electrolyte, the non-aqueous electrolyte battery and the non-aqueous electrolyte electric double layer capacitor have a small internal resistance and excellent conductivity, Background technique [0002] At present, nickel-cadmium batteries are mainly used as storage batteries for driving power sources for AVs such as personal computers and VTRs, and memory backups for information equipment. As a substitute for such nickel-cadmium batteries, in recent years, non-aqueous electrolyte storage batteries with high voltage, high energy density, and ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/02H01G11/62H01M6/16H01M10/052H01M10/056H01M10/0567H01M10/36H01M10/42
CPCH01M6/168H01M10/0567Y02E60/122Y02T10/7022H01M6/164Y02E60/13H01M10/056Y02T10/7011H01M10/052H01M10/4235H01G9/038H01G11/62H01G11/64Y02T10/70Y02E60/10
Inventor 大月正珠远藤茂树荻野隆夫
Owner BRIDGESTONE CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com