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Nonaqueous electrolyte rechargeable battery

A non-aqueous electrolyte and secondary battery technology, applied in the direction of non-aqueous electrolyte storage batteries, secondary batteries, lithium storage batteries, etc., can solve the problem of not using boric acid, etc., and achieve the effects of inhibiting expansion and excellent charge-discharge cycle performance

Inactive Publication Date: 2015-09-02
GS YUASA INT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no record of using boric acid

Method used

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  • Nonaqueous electrolyte rechargeable battery
  • Nonaqueous electrolyte rechargeable battery
  • Nonaqueous electrolyte rechargeable battery

Examples

Experimental program
Comparison scheme
Effect test

reference example B1

[0135] Production: Dissolve LiPF at a concentration of 1.0 mol / l in a mixed solvent of ethylene carbonate and ethyl methyl carbonate in a volume ratio of 3:7 6 To the resulting electrolyte, 1.0% by mass of boric acid (manufactured by Nacalai Tesque, with a purity of 99.5% or more) was further added to the electrolyte, and stirred and mixed. This was used as the non-aqueous electrolyte of Reference Example B1.

Embodiment B1

[0139] Production: Dissolve LiPF at a concentration of 1.0 mol / l in a mixed solvent of ethylene carbonate and ethyl methyl carbonate in a volume ratio of 3:7 6 In the resulting electrolyte, 1.0% by mass of the above-mentioned boric acid was further added to the above-mentioned electrolyte and gently stirred, and then 2.0% by mass of zeolite powder with respect to the mass of the solution was added, and stirred and mixed. Here, as the zeolite powder, a product obtained by drying "molecular sieve 3A (trade name) (powder, particle size of 10 μm or less, surface pore diameter of 0.3 nm)" manufactured by Mizusawa Chemical Industry Co., Ltd. at 350°C under reduced pressure for 12 hours is used. This was used as the non-aqueous electrolyte of Example B1.

Embodiment B2

[0141] Production: Dissolve LiPF at a concentration of 1.0 mol / l in a mixed solvent of ethylene carbonate and ethyl methyl carbonate in a volume ratio of 3:7 6 In the resulting electrolyte, 0.5% by mass of the above-mentioned boric acid was further added to the above-mentioned electrolyte, and lightly stirred, and then 2.0% by mass of zeolite powder with respect to the mass of the solution was added and stirred and mixed. Here, as the zeolite powder, "molecular sieve 3A (trade name) (powder, particle size of 10 μm or less, surface pore diameter of 0.3 nm)" manufactured by Mizusawa Chemical Industry Co., Ltd. was dried under reduced pressure at 350°C for 12 hours. This was used as the non-aqueous electrolyte of Example B2.

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Abstract

[Solution] The p resent invention is able to provide a nonaqueous electrolyte rechargeable battery having excellent charge and discharge cycle performance by using a nonaqueous electro lyte to which boric acid is added. Because boric acid is an extremely inexpensive material, the nonaqueous electrolyte rechargeable battery can be provided at a low price. Furthermore, boric acid exhibits a better effect than other boron com pounds such as borate ester, etc.

Description

Technical field [0001] The present invention relates to a non-aqueous electrolyte secondary battery provided with a non-aqueous electrolyte containing additives. Background technique [0002] The non-aqueous electrolyte secondary battery represented by the lithium ion secondary battery has a high energy density and is widely used as a power source for mobile devices represented by mobile phones. In recent years, research has been conducted on the application of non-aqueous electrolyte secondary batteries in the automotive field such as electric vehicles, hybrid vehicles, and plug-in hybrid vehicles, and some of them have been put into practical use. These automotive batteries require high energy density and require excellent charge-discharge cycle performance. That is, when charging vehicles such as electric vehicles, hybrid vehicles, and plug-in hybrid vehicles, it is desirable to secure a certain travelable distance. Generally speaking, the discharge capacity of a non-aqueous...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567
CPCH01M10/0567Y02E60/122H01M10/052Y02T10/7011Y02E60/10
Inventor 岸本显中山奈绪子
Owner GS YUASA INT LTD