Title:
POROUS FILM, SEPARATOR FOR SECONDARY BATTERY, AND SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/053821
Kind Code:
A1
Abstract:
This porous film has a porous substrate and a porous layer disposed on at least one surface of the porous substrate, the porous layer containing inorganic particles and an organic resin A. The porous film has a dry adhesion property γ (N/m) as determined under condition a (70°C / 5 MPa / 7 seconds) and a wet adhesion property δ (N/m) as determined under condition b (condition a + electrolyte solution injection step + 60°C / left to stand 17 hours) that satisfy 0.1 ≤ δ/γ≤ 0.8. Provided is a low-cost porous film that improves yield and electrolyte solution injectability during cell production and during initial charge-discharge.
Inventors:
KAMON KEIICHI (JP)
KAI NOBUYASU (JP)
SASAKI RYO (JP)
OHASHI JUNPEI (JP)
TSUKUDA AKIMITSU (JP)
IMAZU NAOKI (JP)
KAI NOBUYASU (JP)
SASAKI RYO (JP)
OHASHI JUNPEI (JP)
TSUKUDA AKIMITSU (JP)
IMAZU NAOKI (JP)
Application Number:
PCT/JP2022/032525
Publication Date:
April 06, 2023
Filing Date:
August 30, 2022
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
H01M50/451; H01M50/414; H01M50/417; H01M50/42; H01M50/423; H01M50/434; H01M50/443; H01M50/489
Domestic Patent References:
| WO2020184351A1 | 2020-09-17 | |||
| WO2016098684A1 | 2016-06-23 | |||
| WO2016152863A1 | 2016-09-29 | |||
| WO2017169845A1 | 2017-10-05 | |||
| WO2018037867A1 | 2018-03-01 | |||
| WO2019107521A1 | 2019-06-06 | |||
| WO2020105673A1 | 2020-05-28 |
Foreign References:
| JP2018163872A | 2018-10-18 | |||
| JP2019029314A | 2019-02-21 |
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