Title:
SEPARATOR FOR BATTERIES
Document Type and Number:
WIPO Patent Application WO/2022/004148
Kind Code:
A1
Abstract:
[Problem] The purpose of the present invention is to provide a separator which has excellent heat resistance, while exhibiting improved electrolyte solution pourability during the production of a battery. [Solution] The present invention is a separator for batteries, said separator having a polyolefin porous film and a heat-resistant porous layer that is provided on at least one surface of the porous film, and said separator being characterized in that: the heat-resistant porous layer contains inorganic particles and an organic synthetic resin component; and among the inorganic particles, the number of particles (B) having a particle diameter of 100 nm or less and adhering to the surface of an inorganic particle (A) is 5.0 or less, said inorganic particle (A) having a particle diameter of 0.3 μm or more.
Inventors:
NINOMIYA HIROKAZU (JP)
ECHIZEN KENJI (JP)
ECHIZEN KENJI (JP)
Application Number:
PCT/JP2021/018344
Publication Date:
January 06, 2022
Filing Date:
May 14, 2021
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
H01M50/414; H01M50/417; H01M50/431; H01M50/434; H01M50/443; H01M50/446; H01M50/451
Domestic Patent References:
| WO2016157770A1 | 2016-10-06 | |||
| WO2018055882A1 | 2018-03-29 | |||
| WO2016084364A1 | 2016-06-02 | |||
| WO2017073598A1 | 2017-05-04 |
Foreign References:
| JP2014160580A | 2014-09-04 | |||
| JP2009039910A | 2009-02-26 | |||
| JPS5542233A | 1980-03-25 |
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