Separator for nonaqueous electrolyte cell, nonaqueous electrolyte cell, and method for manufacturing nonaqueous electrolyte cell

A non-aqueous electrolyte and battery technology, used in non-aqueous electrolyte batteries, electrolyte battery manufacturing, batteries, etc., can solve the problems of insufficient adhesion and peeling between the substrate and the PVDF layer, and achieve high manufacturing yield and battery performance. excellent effect

Active Publication Date: 2017-08-01
TEIJIN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, with the conventional PVDF layer, since the adhesion between the base material and the PVDF layer is not sufficient, for example, when the separator is cut into a predetermined size, the PVDF layer may be separated from the base material at the cut end face. peeling off phenomenon

Method used

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  • Separator for nonaqueous electrolyte cell, nonaqueous electrolyte cell, and method for manufacturing nonaqueous electrolyte cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0214] (production of diaphragm)

[0215] As the polyvinylidene fluoride-based resin, a vinylidene fluoride-hexafluoropropylene copolymer (manufactured by Kureha Chemical Co., Ltd.-KF9300) was used, and as an acrylic resin, a copolymer of methyl methacrylate-methacrylic acid ( PMMA; manufactured by Mitsubishi Rayon Co., Ltd. - ACRYPET MD001). The polyvinylidene fluoride resin and acrylic resin were mixed at a mass ratio of 75 / 25, and the components of the polyvinylidene fluoride resin and acrylic resin were dissolved in a mixed solvent containing dimethylacetamide and tripropylene glycol (di In methylacetamide / tripropylene glycol=80 / 20 mass ratio), the components of polyvinylidene fluoride resin and acrylic resin were made into 3.8 mass %, and the slurry for coating was produced.

[0216] This slurry for coating was coated equally on both sides of a polyethylene microporous membrane (porous substrate; TN0901: manufactured by SK Corporation) with a film thickness of 9 μm, a Gu...

Embodiment 2～6

[0226] In Example 1, the content ratio (mass ratio) of the polyvinylidene fluoride-based resin and the acrylic resin was changed as shown in Table 1, except that, in the same manner as in Example 1, a non-aqueous electrolyte battery was obtained. diaphragm.

Embodiment 7

[0228] A separator for a non-aqueous electrolyte battery was produced in the same manner as in Example 1 except that the acrylic resin in Example 1 was changed to polyethyl methacrylate (PEMA; Aldrich - PEMA).

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Abstract

An embodiment according to the present disclosure provides a separator for a nonaqueous electrolyte cell, comprising a composite membrane provided with a porous substrate and an adhesive porous layer provided on one or both faces of the porous substrate and including an adhesive resin, the adhesive porous layer further including acrylic resin in a state in which the acrylic resin is mixed with the adhesive resin, the peel strength between the porous substrate and the adhesive porous layer being 0.20 N / 10 mm or more, and the Gurley value being 200 seconds / 100 cc or less.

Description

technical field [0001] The present invention relates to a separator for a nonaqueous electrolyte battery, a nonaqueous electrolyte battery, and a method for manufacturing the nonaqueous electrolyte battery. Background technique [0002] Non-aqueous electrolyte batteries typified by lithium ion secondary batteries are widely used as power sources for portable electronic devices such as notebook computers, mobile phones, digital cameras, and camcorders. [0003] In recent years, along with the miniaturization and weight reduction of portable electronic devices, the weight reduction of the external package of the non-aqueous electrolyte battery has been achieved. As an exterior part, an aluminum casing has been developed instead of a stainless steel casing, and a package (pack) made of an aluminum laminate film has been developed instead of a metal casing. [0004] However, aluminum laminated film packaging is more flexible than metal casings. Therefore, when the adhesive for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M10/058H01M50/42H01M50/426H01M50/454H01M50/457H01M50/489H01M50/491
CPCH01M10/058C09J133/06H01M10/0525Y02E60/10H01M50/446Y02P70/50H01M50/489H01M50/454H01M50/457H01M50/491H01M50/426H01M50/42H01M10/049H01M10/052H01M50/461H01M50/449C09J127/16C09J127/20H01M2220/30
Inventor 中广贵本多劝
Owner TEIJIN LTD
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