Title:
POROUS FILM, SEPARATOR FOR SECONDARY BATTERIES, AND SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2019/065660
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a porous film which has high resistance to thermal film rupture, high adhesion to an electrode, and excellent battery characteristics. A porous film which comprises a porous layer on at least one surface of a porous substrate, and which is configured such that: the porous layer contains the resin A and the resin B described below; and if α is the surface aperture ratio of the porous layer and β is the cross-sectional void fraction of the porous layer, α/β is less than 1.0.
Resin A: a resin that has a melting point of 150°C or higher, or a resin that does not substantially have a melting point
Resin B: a resin that has a melting point of lower than 150°C, or an amorphous resin
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Inventors:
KAI NOBUYASU (JP)
IKOMA KEI (JP)
TSUKUDA AKIMITSU (JP)
IKOMA KEI (JP)
TSUKUDA AKIMITSU (JP)
Application Number:
PCT/JP2018/035531
Publication Date:
April 04, 2019
Filing Date:
September 25, 2018
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B32B5/32; B32B27/00; H01M50/409; H01M50/443; H01M50/489; H01M50/491
Foreign References:
| JP2006338917A | 2006-12-14 | |||
| JP2013211160A | 2013-10-10 | |||
| JP2013032491A | 2013-02-14 | |||
| JP2014198832A | 2014-10-23 | |||
| JP5183435B2 | 2013-04-17 | |||
| JP5286817B2 | 2013-09-11 | |||
| JP2013020769A | 2013-01-31 | |||
| JP2017184497A | 2017-10-05 |
Other References:
See also references of EP 3690984A4
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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