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Separator for electronic component and method for producing the same

A technology for electronic components and manufacturing methods, applied in battery pack components, electrical components, circuits, etc., can solve problems such as performance degradation, and achieve the effects of excellent productivity, excellent heat resistance, and high reliability

Active Publication Date: 2005-08-31
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This hierarchical structure is suitable for separation membranes with selective separation functions such as reverse osmosis membranes, but it becomes a major factor of performance degradation for separators for electronic components that move ions or electrons bidirectionally through repeated charge and discharge.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Dissolve polyamideimide with a glass transition temperature of 300°C in N,N-dimethylacetamide as a good solvent, then add and mix ethylene glycol as a poor solvent and the primary average particle size of the filler particles as Polytetrafluoroethylene particles of 0.25 μm and a melting point of 320° C. were used to obtain coatings. The obtained paint had a solid component concentration of 30% by weight, and filler particles in the solid component were 30% by weight. Next, the above-mentioned paint was applied to a resin film base material made of polyethylene terephthalate by casting method, and dried at 80° C. in a blast dryer to completely evaporate the solvent. Then, the resin film base material was peeled off, and the separator for electronic components of this invention was obtained. The resulting porous membrane had a thickness of 25 μm.

Embodiment 2

[0046]A porous film was obtained in the same manner as in Example 1, but a porous film with a thickness of 15 μm was obtained by adjusting the coating amount.

Embodiment 3

[0048] A porous membrane was obtained in the same manner as in Example 1, but a porous membrane with a thickness of 6 μm was obtained by adjusting the coating amount.

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PUM

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Abstract

The present invention provides an electronic component separator that allows for easy thickness reduction and also has excellent mechanical strength, dimensional stability and heat resistance. This electronic component separator contains in a porous film made of a synthetic resin with a glass transition temperature of 180° C. or above, filler grains having a melting point of 180° C. or above or virtually no melting point, and the electronic component separator is produced by way of applying onto a base a coating material comprising (a) a synthetic resin with a glass transition temperature of 180° C. or above, (b) filler grains having a melting point of 180° C. or above or virtually no melting point, (c) at least one good solvent capable of dissolving the synthetic resin, and (d) at least one poor solvent incapable of dissolving the synthetic resin, and then drying the coated base to form a porous film.

Description

technical field [0001] The present invention relates to a separator for electronic components suitable for electronic components, namely, lithium ion batteries, polymer lithium batteries, aluminum electrolytic capacitors, or electric double layer capacitors, and a method for producing the same. Background technique [0002] In recent years, the demand for lithium-ion secondary batteries and polymer lithium secondary batteries as electronic components has increased significantly with the increase in demand for electrical and electronic equipment and the development of hybrid vehicles, whether it is industrial equipment or consumer equipment . As these electrical and electronic devices are rapidly increasing in capacity and function, lithium ion secondary batteries and polymer lithium secondary batteries are also required to have high capacity and high function. [0003] Lithium-ion secondary batteries and polymer lithium secondary batteries have a structure in which an activ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D3/00C08J5/22H01G9/02H01M8/00H01M50/414H01M50/423H01M50/426H01M50/489
CPCH01M2/166H01M2/1653Y02E60/13Y02E60/10H01M50/446H01M50/414H01M50/489H01M50/426H01M50/423H01M50/491H01M50/42H01M50/443H01M50/403
Inventor 户塚博己杉山仁英高畑正则深谷和彦
Owner SUMITOMO CHEM CO LTD
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