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Separator for nonaqueous electrolyte batteries, nonaqueous electrolyte battery using it, and method for mfg. separator for nonaqueous electrolyte batteries

A non-aqueous electrolyte and battery technology, applied in the direction of non-aqueous electrolyte batteries, non-aqueous electrolyte batteries, non-aqueous electrolytes, etc., can solve the problems of not being able to provide energy density and cycle life, and achieve excellent battery formability, excellent performance, high intensity effect

Inactive Publication Date: 2005-01-26
MITSUBISHI PAPER MILLS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0029] However, even the described nonwoven fabrics for non-aqueous electrolyte battery separators cannot provide satisfactory energy density and cycle life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0186] A mixed solution containing 1% titanium tetraisopropoxide (ORGATIX TA-10, manufactured by Matsumoto Chemical Industry Co., Ltd.) and 99% ethanol was prepared. A kind of polypropylene porous membrane (fabric unit weight: 12.8g / m 2 ; Thickness: 25 μm), the maximum pore diameter of this porous membrane is measured as 6 μm by the bubble point method described in ASTM F-316-80, then the porous membrane is dried with hot air, and obtained is applied with 0.3% organotitanium compound hydrolyzate porous membrane. Use it as a separator for non-aqueous electrolyte batteries.

Embodiment 2

[0188] Chlorodimethylsilane was dissolved in chloroform to a concentration of 1 mol / liter to prepare a chlorodimethylsilane solution. The unit weight of the impregnated fabric with the chlorodimethylsilane solution prepared in this embodiment is 30g / m 2 , a rayon woven fabric having a thickness of 93 μm, and then cured by heating to obtain a rayon woven fabric to which an organosilicon compound was applied by 8.1%. Use it as a separator for non-aqueous electrolyte batteries.

Embodiment 3

[0190]A nonwoven fabric containing 30% NBKP and 70% polypropylene fibers was impregnated with a solution of 1% γ-glycidoxypropyltrimethoxysilane (A-187, produced by Nippon Unicar Co., Ltd.), The fabric unit weight is 20g / m 2 , with a thickness of 72 μm, and then cured by heating to obtain a nonwoven fabric applied with 6.9% organosilicon compound (by weight of NBKP). Use it as a separator for non-aqueous electrolyte batteries.

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PUM

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Abstract

The present invention provides a separator for non-aqueous electrolyte batteries which neither breaks nor slips off at the time of fabrication of battery, gives excellent battery fabricability, causes no internal short-circuit caused by contact between electrodes even if the electrodes are externally short-circuited, can inhibit ignition of battery and produces high energy density and excellent cycle life, and further provides a non-aqueous electrolyte battery using the separator and a method for manufacturing the separator. That is, the present invention relates to a separator for non-aqueous electrolyte batteries which comprises a porous base containing at least one member selected from a porous film, a woven fabric or nonwoven fabric containing an organic fiber and a paper and an organometallic compound applied to the porous base; a method for the manufacture of the separator for non-aqueous electrolyte batteries which comprises allowing said porous base to contact with a solution of organometallic compound by impregnation, coating or spraying, followed by drying or curing with heating to apply the organometallic compound to the porous base; and a non-aqueous electrolyte battery using the separator.

Description

technical field [0001] The present invention relates to a separator for a non-aqueous electrolyte battery, which can provide excellent workability when manufacturing a battery, does not shrink or burn even when the electrodes are short-circuited externally to generate heat, and does not cause damage due to contact between electrodes. The internal short circuit of the invention can prevent the battery from igniting, and can provide high energy density and excellent cycle life; it also relates to a non-aqueous electrolyte battery using the separator and a method for preparing a separator for the non-aqueous electrolyte battery. Background technique [0002] Hitherto, porous materials including polyolefins such as polypropylene and polyethylene have been used as separators for nonaqueous electrolyte batteries such as lithium secondary batteries. For example, JP-A-6-325747 discloses a microporous film comprising high molecular weight polyethylene having an intrinsic viscosity (η...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M6/16H01M10/05H01M10/0566H01M50/417H01M50/42H01M50/423H01M50/429H01M50/431H01M50/437H01M50/451H01M50/454H01M50/491
CPCY02E60/12D06M13/50D06M13/503H01M2/16H01M2/1606H01M2/1666D06M13/513H01M2/1626H01M2/162H01M2/1686H01M2/1613H01M2300/0025H01M6/16C03C13/00C03C25/40D21H17/63D21H19/02H01M50/44H01M50/431H01M50/4295H01M50/437H01M50/429H01M50/417H01M50/451H01M50/454H01M50/491H01M50/423H01M50/42
Inventor 佃贵裕船江晴芳
Owner MITSUBISHI PAPER MILLS LTD
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