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Non-aqueous electrolytic solution and battery

A non-aqueous electrolyte, electrolyte technology, applied in the field of non-aqueous electrolyte, can solve the problem of unsatisfactory discharge characteristics, and achieve the effect of improving temperature characteristics and high output characteristics

Inactive Publication Date: 2009-02-04
SHIN ETSU CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although it has high performance, the discharge characteristics of lithium-ion batteries in severe environments, especially low-temperature environments, and high output levels that require a large amount of current in a short period of time are not satisfactory

Method used

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  • Non-aqueous electrolytic solution and battery
  • Non-aqueous electrolytic solution and battery
  • Non-aqueous electrolytic solution and battery

Examples

Experimental program
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Effect test

preparation example Construction

[0038]The positive and negative electrodes can be prepared by any desired method. Electrodes are generally prepared by adding active materials, binders, conductive agents, and the like to a solvent to form a slurry, applying the slurry to a current collector sheet, drying, and pressure bonding. The binder used herein is generally selected from polyvinylidene fluoride, polytetrafluoroethylene, styrene-butadiene rubber, isoprene rubber, and various polyimide resins. The conductive agent used herein is generally selected from carbonaceous materials such as graphite and carbon black; and metallic materials such as copper and nickel. As a current collector, aluminum and aluminum alloys are generally used for the positive electrode; and metals such as copper, stainless steel, nickel, and alloys thereof are used for the negative electrode.

[0039] The separator disposed between the positive electrode and the negative electrode is not particularly limited as long as it is stable wit...

Embodiment 1

[0044] Synthesis of Siloxanes Modified with Organic Groups Bearing Ether Bonds

[0045] Siloxanes of formula (4) are synthesized as follows.

[0046] A reactor equipped with a stirrer, thermometer and reflux condenser was charged with 100 g of 1,2-dimethoxyglycerol monoallyl ether, 100 g of isopropanol (IPA) and 0.05 g of 0.5 wt% chlorine IPA solution of platinum acid. Stirring was performed at 60° C., and 107 g of pentamethyldisiloxane having the chemical formula (16) was added dropwise to the mixture. The reaction occurs when the molar ratio of terminal unsaturated groups to SiH groups is approximately 1.05. The reaction solution was finely distilled in a vacuum state to obtain the siloxane represented by the chemical formula (4) modified with an organic group having an ether bond. It has a 5.5mm 2 / s viscosity and 99.9% purity by gas chromatography analysis.

[0047] Preparation of non-aqueous electrolyte

[0048] The non-aqueous electrolytic solution is by dissol...

Embodiment 2-6

[0062] As listed in Table 1, other siloxanes modified with organic groups having ether linkages were tested according to Example 1 for their battery performance. The results are shown in Table 1 together with the results of Example 1 and Comparative Example.

[0063] Table 1

[0064]

[0065]

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Abstract

A non-aqueous electrolytic solution is provided comprising a non-aqueous solvent, an electrolyte salt, and a siloxane modified with ether bond-bearing organic group. A non-aqueous electrolyte secondary battery using the same has improved characteristics both at low temperatures and at high outputs.

Description

technical field [0001] The present invention relates to a non-aqueous electrolytic solution comprising siloxane modified with organic groups having ether linkages for lithium-ion accumulators capable of charging by migration of lithium ions between positive and negative electrodes / discharging operation and involving batteries using this electrolyte. A battery using the electrolytic solution of the present invention has improved temperature characteristics and high output characteristics. Background technique [0002] Due to the high energy density, lithium-ion batteries have been used more and more in recent years as mobile power sources for portable computers, mobile phones, digital cameras and similar products. A great deal of effort has also been devoted to the research of lithium-ion storage batteries as a power source for electric vehicles, with the hope that electric vehicles will reach a practically acceptable level as environmentally friendly vehicles. [0003] Al...

Claims

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Application Information

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IPC IPC(8): H01M10/40H01M6/16H01M10/0525H01M10/0567
CPCY02E60/122Y02E60/10
Inventor 樫田周宫胁悟中西铁雄荒又干夫
Owner SHIN ETSU CHEM CO LTD
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