POROUS COMPOSITE FILM, SEPARATOR FOR BATTERY, BATTERY, AND POROUS COMPOSITE FILM PRODUCTION METHOD

Title:

POROUS COMPOSITE FILM, SEPARATOR FOR BATTERY, BATTERY, AND POROUS COMPOSITE FILM PRODUCTION METHOD

Document Type and Number:

WIPO Patent Application WO/2019/065844

Kind Code:

A1

Abstract:

The purpose of this invention is to provide a porous composite film suitable for a separator for a battery having superior cycle properties. Provided is a porous composite film obtained by layering: a porous substrate; and a porous layer on at least one surface of the porous substrate, said porous layer including a fluorine-containing resin and satisfying the following requirements (i), (ii) and (iii). (i) The porous layer has a cross-section void area distribution D150 value of 0.06–0.38μm2, and a cross-section void area distribution D190 value of 0.20–1.15μm2. (ii) The porous layer has a surface pore area distribution D250 value of 0.0060–0.0072μm2, and a surface pore area distribution D290 value of 0.0195–0.0220μm2. (iii) The porous layer has a porosity of 50–70%.

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Inventors:

TAGUCHI TAKAYUKI (JP)
MASUDA SHOZO (JP)
SHIMIZU YASUKI (JP)

Application Number:

PCT/JP2018/035945

Publication Date:

April 04, 2019

Filing Date:

September 27, 2018

Export Citation:

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Assignee:

TORAY INDUSTRIES (JP)

International Classes:

B32B5/24; B32B27/30; H01M50/403; H01M50/417; H01M50/449; H01M50/491; H01M50/489

Domestic Patent References:

WO2014021292A1	2014-02-06
WO2014126079A1	2014-08-21
WO2005049318A1	2005-06-02
WO2017094486A1	2017-06-08
WO2014126079A1	2014-08-21

Foreign References:

JP2016038934A	2016-03-22
JP2003171495A	2003-06-20
JP2013235824A	2013-11-21
JP5964951B2	2016-08-03
JP2016038934A	2016-03-22
JP2003171495A	2003-06-20
JP2017191838A	2017-10-19

Other References: