Title:
SEPARATOR FOR NONAQUEOUS SECONDARY BATTERIES, AND NONAQUEOUS SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2020/184351
Kind Code:
A1
Abstract:
The present invention relates to a separator for nonaqueous secondary batteries, which is provided with a polyolefin porous membrane and a porous layer that is superposed on at least one surface of the polyolefin porous membrane, and which is configured such that: the porous layer contains a vinylidene fluoride-hexafluoropropylene copolymer and a hydrophobic ionic liquid-type antistatic agent that is soluble in a nonaqueous electrolyte solution; the vinylidene fluoride-hexafluoropropylene copolymer has from 0.3 mol% to 10 mol% (inclusive) of a hexafluoropropylene unit, while having a weight average molecular weight of from 350,000 to 2,000,000 (inclusive); the hydrophobic ionic liquid-type antistatic agent that is soluble in a nonaqueous electrolyte solution is a fluorine-containing quaternary ammonium salt which contains, as a cation, a quaternary ammonium ion that has one or more hydrocarbon groups having 4 or more carbon atoms.
Inventors:
SHIMBE YUKAKO (JP)
MIZUNO NAOKI (JP)
MIZUNO NAOKI (JP)
Application Number:
PCT/JP2020/009271
Publication Date:
September 17, 2020
Filing Date:
March 04, 2020
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B32B5/22; B32B27/30; H01M10/052; H01M10/0566; H01M50/409; H01M50/489; H01M50/491
Domestic Patent References:
| WO2019054422A1 | 2019-03-21 |
Foreign References:
| JP2017135111A | 2017-08-03 | |||
| JP2018503956A | 2018-02-08 | |||
| JP2012510704A | 2012-05-10 | |||
| JP2015079752A | 2015-04-23 | |||
| JP2009259755A | 2009-11-05 | |||
| JP2010050076A | 2010-03-04 |
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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