Title:
SEPARATOR FOR POWER STORAGE DEVICES, AND POWER STORAGE DEVICE COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2023/229033
Kind Code:
A1
Abstract:
The present invention provides a separator for power storage devices, the separator comprising a base material 10 which is a polyolefin microporous membrane that contains a polyolefin as a main component, and a cover layer 20 which is arranged on at least one surface of the base material 10. With respect to this separator for power storage devices, the cover layer 20 contains an inorganic filler 1 and a thermoplastic polymer; the thermoplastic polymer comprises particulate polymers 2 that protrude from the surface of an inorganic filler portion L1; and with respect to the surface observation of the cover layer 20, the coefficient of variation (cv) of the areas (si) of Voronoi polygons that are obtained by means of Voronoi tessellation using the protruding particulate polymers 2 as generator points is 0.10 to 0.60.
Inventors:
MISAWA KAZUSHI (JP)
Application Number:
PCT/JP2023/019757
Publication Date:
November 30, 2023
Filing Date:
May 26, 2023
Export Citation:
Assignee:
ASAHI CHEMICAL IND (JP)
International Classes:
H01M50/451; B32B5/18; B32B27/18; B32B27/32; H01G11/52; H01M50/414; H01M50/417; H01M50/434; H01M50/437; H01M50/443; H01M50/446; H01M50/463; H01M50/489
Domestic Patent References:
| WO2016152026A1 | 2016-09-29 | |||
| WO2020175079A1 | 2020-09-03 |
Foreign References:
| CN111668427A | 2020-09-15 | |||
| CN112940650A | 2021-06-11 | |||
| KR20160118979A | 2016-10-12 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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