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Additive for non-aqueous liquid electrolyte, non-aqueous liquid electrolyte secondary cell and no-aqueous liquid electrolyte electric double layer capacitor

A technology for electrolyte additives and electric double-layer capacitors, applied in the field of non-aqueous electrolyte electric double-layer capacitors and non-aqueous electrolyte storage batteries, can solve safety problems, high risk of electrolyte flame combustion expansion, non-aqueous Electrolyte fire and other problems

Inactive Publication Date: 2004-01-28
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] 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 generates heat, the non-aqueous electrolyte based on the above-mentioned organic solvent is vaporized and decomposed to generate gas, and the non-aqueous electrolyte electric double-layer capacitor is ruptured due to the generated gas. , Moreover, 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

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0126] Hereinafter, examples and comparative examples are shown, and the present invention will be specifically described, but the present invention is not limited to the following examples. "Non-aqueous electrolyte battery" Example 1 [Preparation of non-aqueous electrolyte]

[0127] Add (10 Volume %) (non-aqueous electrolyte additive) phosphazene derivatives (in the above-mentioned general formula (1), n ​​is 3, four R are fluorine, two R are the cyclic phosphazene of the methoxy group containing fluorine Derivatives (fluorine content in phosphazene derivatives: 50% by weight)) 10ml, and then LiBF 4 (Supporting salt) was dissolved at a concentration of 0.75 mol / kg, and a non-aqueous electrolyte solution (25° C. viscosity: 4.2 mPa·s (4.2 cP)) was prepared.

[0128] The obtained non-aqueous electrolytic solution was evaluated in the same way as the safety evaluation method described later, and when the non-aqueous electrolytic solution was not completely ignited even if a t...

Embodiment 2

[0141] In the "preparation of non-aqueous electrolytic solution" of Example 1, except for 95 ml of mixed solvent of diethyl carbonate and ethane carbonate, and 5 ml (5 volume %) of phosphazene derivatives, it is the same as Example 1 A non-aqueous electrolytic solution (viscosity at 25° C. of 3.9 mPa·s (3.9 cP)) was carefully prepared, and non-combustibility, non-combustibility, safety, and degradation resistance were evaluated. 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

[0143] In the "preparation of non-aqueous electrolyte" of Example 1, except for 95 ml of mixed solvent of diethyl carbonate and ethane carbonate, 5 ml (5 volume %) of phosphazene derivatives, and LiPF 5 instead of LiBF 4 In addition, a non-aqueous electrolytic solution (viscosity at 25° C. of 3.9 mPa·s (3.9 cP)) was prepared in the same manner as in Example 1, and non-flammability, flame retardancy, safety, and degradation resistance were evaluated. 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. Comparative example 1

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Abstract

The present invention provides an additive for a non-aqueous electrolyte comprising a phosphazene derivative represented by the following formula (1): (PNR2)n formula (1) wherein R represents a fluorine-containing substituent or fluorine, at least one of all R's is a fluorine-containing substituent, and n represents 3 to 14. More particularly, the present invention provides a non-aqueous electrolyte secondary cell and a non-aqueous electrolyte electric double layer capacitor comprising the additive for a non-aqueous electrolyte which exhibit good low temperature characteristics, good resistance to deterioration, and good incombustibility, and accordingly are significantly high in safety.

Description

technical field [0001] The present invention relates to additives added to non-aqueous electrolytes such as non-aqueous electrolyte storage batteries and non-aqueous electrolyte electric double-layer capacitors, and further relates to non-aqueous electrolytes containing the above-mentioned additives, which are excellent in corrosion resistance and excellent incombustibility. Liquid storage batteries and non-aqueous electrolyte electric double layer capacitors, Background technique [0002] At present, nickel-cadmium batteries are mainly used as storage batteries for driving power sources for personal computers, AVs such as VTRs, and storage 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 excellent self-discharge performance have attracted special attention, and various developments have been carried out. As a result, , some of which ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20H01G11/14H01G11/22H01G11/24H01G11/38H01G11/42H01G11/54H01G11/60H01G11/62H01G11/64H01M10/05H01M10/052H01M10/0525H01M10/0567H01M10/0568H01M10/0569H01M10/36H01M10/42
CPCH01G9/2004H01M10/0525H01G9/2031H01M10/4235Y02T10/7022Y02T10/7011Y02E60/13Y02E10/542Y02E60/122H01M10/0567H01G11/58H01G11/64Y02E60/10Y02T10/70
Inventor 大月正珠远藤茂树荻野隆夫
Owner BRIDGESTONE CORP
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