Title:
SEPARATOR FOR POWER STORAGE DEVICE, AND POWER STORAGE DEVICE INCLUDING SAME
Document Type and Number:
WIPO Patent Application WO/2022/114228
Kind Code:
A1
Abstract:
The present disclosure provides: a separator which is for a power storage device and has high adhesive force to an electrode and a small thermal shrinkage rate; and a power storage device including the same. A separator for a power storage device according to the present disclosure comprises: a base material of a polyolefin microporous film; and a coating layer disposed on at least one surface of the base material, wherein the coating layer contains an inorganic filler and a particulate polymer protruding to a position that corresponds to at least 0.1 times the thickness of the coating layer. The separator for a power storage device has one or more among the following characteristics: the coating layer is formed into an inclined shape so that the thickness of the coating layer increases toward the protruded particulate polymer; at least 20% of the protruded particulate polymer is in contact with the surface of the base material; the 180º peel strength of the coating layer from the base material is at least 200 gf/cm; the average number of adjacent protruded particulate polymers is less than 2; and the ratio of the average particle diameter of the protruded particulate polymer to the average particle diameter of the inorganic filler is greater than 10.
Inventors:
TAKAMORI HITOSHI (JP)
KIDENA MAYU (JP)
MISAWA KAZUSHI (JP)
KIDENA MAYU (JP)
MISAWA KAZUSHI (JP)
Application Number:
PCT/JP2021/043927
Publication Date:
June 02, 2022
Filing Date:
November 30, 2021
Export Citation:
Assignee:
ASAHI CHEMICAL IND (JP)
International Classes:
H01G11/52; H01M50/443; H01M50/446; H01M50/451
Domestic Patent References:
| WO2020175079A1 | 2020-09-03 | |||
| WO2019089492A1 | 2019-05-09 | |||
| WO2020175079A1 | 2020-09-03 | |||
| WO2021085144A1 | 2021-05-06 |
Foreign References:
| KR20160118979A | 2016-10-12 | |||
| JP2017107851A | 2017-06-15 | |||
| KR20160118979A | 2016-10-12 | |||
| CN105958000A | 2016-09-21 |
Other References:
"Polymer Handbook", WILEY-INTERSCIENCE PUBLICATION
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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