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Separator and battery using the same

A separator and microporous membrane technology, applied in the field of separators and batteries using the separators, can solve problems such as increased power consumption, shortened driving time, etc., achieve full impregnation performance, do not hinder ionic conductivity, and improve the performance of separators and batteries. Effects of Features

Active Publication Date: 2009-08-12
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is such a problem that due to the realization of advanced functions, the amount of power consumption increases, thereby shortening the driving time

Method used

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  • Separator and battery using the same
  • Separator and battery using the same
  • Separator and battery using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0124] The polyethylene microporous membrane was coated with a solution obtained by dissolving 7 wt % of aramid resin in N-methyl-pyrrolidone by a desktop coater. The film was immersed in a water bath and subjected to phase separation, after which it was dried by hot air to form a film made of aramid resin and having an area density equal to 0.20 mg / cm 2 The functional resin layer, thereby manufacturing the separator of Example 1.

[0125] A polyethylene microporous membrane was obtained by the following method. Polyethylene resin and plasticizer are mixed and extruded, and biaxially stretched into a film. The plasticizer is then released from the film which becomes microporous. However, this method is an example, and polyethylene microporous membranes obtained by other methods may also be suitable for the separator of the present invention.

Embodiment 2

[0127] The separator of Example 2 was manufactured in a similar manner to Example 1, except that the concentration of the aramid resin in the aramid solution was adjusted, and the diameter of the through hole of the functional resin layer was changed. Regarding the concentration of the resin solution, the higher the concentration, the smaller the diameter, and the lower the concentration, the larger the diameter.

Embodiment 3

[0129] The separator of Example 3 was produced in a similar manner to Example 1, except that the concentration of the aramid resin in the aramid solution was adjusted, and the diameter of the through hole of the functional resin layer was changed.

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Abstract

A separator having at least: a base material layer made of a microporous membrane of a polyolefin resin; and a functional resin layer which is made of a resin different from the polyolefin resin and has a porous interconnected structure in which many holes are mutually interconnected. A diameter of a narrowest portion of through-holes of said functional resin layer is larger than a diameter of a narrowest portion of through-holes of said base material layer.

Description

[0001] References to related applications [0002] The present invention contains subject matter related to Japanese Patent Application JP 2008-026465 filed in the Japan Patent Office on Feb. 6, 2008, the entire content of which is hereby incorporated by reference. technical field [0003] The present invention relates to a separator and a battery using the same, and more particularly, to a separator for insulating a positive electrode from a negative electrode and a battery using the same. Background technique [0004] Due to the remarkable development of recent portable electronic technologies, portable phones and notebook-sized computers have been confirmed as fundamental technologies supporting an advanced information society. Research and development to realize advanced functions of those devices has been vigorously developed. There is a problem that, due to the realization of advanced functions, the amount of power consumption increases, thereby shortening the driving...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/14H01M2/16H01M10/36H01M10/40H01M50/417H01M50/426H01M50/449
CPCH01M2/18H01M2/1686Y02E60/122H01M10/0525Y02E60/12H01M2/1653Y02E60/10H01M50/449H01M50/417H01M50/426C08J9/22H01M10/05H01M50/491H01M50/489H01M10/42H01M2010/4292
Inventor 手岛由香子梶田笃史井本浩
Owner MURATA MFG CO LTD