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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
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  • 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 battery generates abnormal heat, gas is generated by gasification and decomposition, and the generated gas and heat cause There is a high risk of battery rupture, fire, and spark ignition generated during a short circuit.

Method used

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  • 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

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preparation example Construction

[0087] The method for preparing the electrolyte for polymer batteries of the present invention is not particularly limited. For example, the following preparation method can be mentioned: mixing the above-mentioned polymer and supporting electrolyte at a mass ratio (polymer / supporting electrolyte) of 9 / 1 , add volatile solvent, mix well, make it dissolve uniformly at about 80°C, heat to about 40°C in vacuum, volatilize volatile solvent, impregnate and swell aprotic organic solvent and containing phosphorus and / or nitrogen after drying The mixed solution of the compounds to prepare the electrolyte. Examples of the volatile solvent include acetonitrile, alcohols, and the like, and acetonitrile is preferable in terms of excellent solubility and the like.

[0088] As the form of the polymer battery electrolyte 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...

Embodiment 1

[0103] Prepare by 50 volume % ethylene carbonate (EC, boiling point 238 ℃), 40 volume % diethyl carbonate (DEC, boiling point 127 ℃), 5 volume % additive A [n is 3, 6 in the general formula (II) R 4 3 of them are methoxy (CH 3 O-), 3 cyclic phosphazene compounds that are fluorine, viscosity at 25°C: 3.9mPa·s, boiling point 230°C], 5% by volume additive B [n is 3, 6 R in the general formula (II) 4 One of them is ethoxy (CH 3 CH 2 O-), five cyclic phosphazene compounds that are fluorine, viscosity at 25°C: 1.2mPa·s, boiling point 125°C], and dissolve LiPF in the mixed solution 6 (supporting electrolyte), the concentration is 1mol / L (M), and the non-aqueous electrolyte is prepared. The safety of the obtained non-aqueous electrolytic solution 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 was evaluated based on the combustion behavior of the flame that...

Embodiment 2～9 and comparative example 1～6

[0113] Prepare the mixed solution of the proportion shown in table 1 and table 2, dissolve LiPF in this mixed solution 6(supporting electrolyte), the concentration is 1mol / L (M), and the non-aqueous electrolyte is prepared. The safety of the obtained non-aqueous electrolytic solution was evaluated in the same manner as in Example 1. Moreover, similarly to Example 1, the nonaqueous electrolyte solution secondary battery was produced using this nonaqueous electrolyte solution, and the acupuncture test and the overcharge test were implemented for this battery. The results are shown in Table 1 and Table 2.

[0114] In Table 1 and Table 2, PC represents propylene carbonate (boiling point 242°C), DMC represents dimethyl carbonate (boiling point 90°C), and EMC represents ethyl methyl carbonate (boiling point 108°C). , MF represent methyl formate (boiling point: 32°C).

[0115] In addition, additive C is in general formula (II), n is 4, 8 R 4 A cyclic phosphazene compound that is ...

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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

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Application Information

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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
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