Title:
BATTERY SEPARATOR, ELECTRODE BODY, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2018/124176
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a battery separator having excellent adhesiveness and short-circuit resistance. The present invention pertains to a battery separator provided with a polyolefin fine porous membrane, and a porous layer stacked on at least one surface of the polyolefin fine porous membrane, wherein: the porous layer includes a vinylidene fluoride - hexafluoropropylene copolymer (A), a vinylidene-fluoride hexafluoropropylene copolymer (B), and inorganic particles; the vinylidene fluoride - hexafluoropropylene copolymer (A) has 0.3-5.0 mol% of a hexafluoropropylene unit, has a weight-average molecular weight of 900,000-2,000,000, and includes a hydrophilic group; and the vinylidene fluoride - hexafluoropropylene copolymer (B) has more than 5.0 mol% but not more 8.0 mol% of a hexafluoropropylene unit and has a weight-average molecular weight of 100,000-750,000.
Inventors:
TSUJIMOTO JUN (JP)
MIZUNO NAOKI (JP)
MIZUNO NAOKI (JP)
Application Number:
PCT/JP2017/046887
Publication Date:
July 05, 2018
Filing Date:
December 27, 2017
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
H01M50/443; H01M50/451; H01M50/491
Domestic Patent References:
| WO2013058368A1 | 2013-04-25 | |||
| WO2016002567A1 | 2016-01-07 | |||
| WO2016042914A1 | 2016-03-24 |
Foreign References:
| JP2014041818A | 2014-03-06 | |||
| JP2001307735A | 2001-11-02 |
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