Title:
SEPARATOR FOR BATTERIES, ELECTRODE BODY AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2018/168835
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a separator for batteries, which has excellent bondability and short circuit resistance. The present invention is a separator for batteries, which is provided with a polyolefin microporous membrane and a porous layer that is arranged on at least one surface of the polyolefin microporous membrane, and which is configured such that: the polyolefin microporous membrane is composed of a polyolefin multilayer microporous membrane that has a three-layer structure wherein a first microporous layer, a second microporous layer and another first microporous layer are laminated in this order; the first microporous layers are formed from a first polyolefin resin that contains a polyethylene and a polypropylene; the content of the polypropylene is from 10% by mass to 50% by mass (inclusive) relative to the total mass of the first polyolefin resin; the second microporous layer is formed only from a polyethylene resin; and the porous layer contains a vinylidene fluoride-hexafluoropropylene copolymer (A), a vinylidene fluoride-hexafluoropropylene copolymer (B) and inorganic particles.
Inventors:
TSUJIMOTO JUN (JP)
MIZUNO NAOKI (JP)
MIZUNO NAOKI (JP)
Application Number:
PCT/JP2018/009674
Publication Date:
September 20, 2018
Filing Date:
March 13, 2018
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B32B5/18; B32B27/30; B32B27/32; H01M50/443; H01M50/491; H01M50/494
Domestic Patent References:
| WO2013058368A1 | 2013-04-25 | |||
| WO2016002567A1 | 2016-01-07 | |||
| WO2016042914A1 | 2016-03-24 | |||
| WO2015194667A1 | 2015-12-23 | |||
| WO2017002947A1 | 2017-01-05 |
Foreign References:
| JP2014041818A | 2014-03-06 | |||
| JP2001307735A | 2001-11-02 |
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