Title:
電池用セパレータ
Document Type and Number:
Japanese Patent JP7340461
Kind Code:
B2
Abstract:
This application is directed to new and/or improved MD and/or TD stretched and optionally calendered membranes, separators, base films, microporous membranes, battery separators including said separator, base film or membrane, batteries including said separator, and/or methods for making and/or using such membranes, separators, base films, microporous membranes, battery separators and/or batteries. For example, new and/or improved methods for making microporous membranes, and battery separators including the same, that have a better balance of desirable properties than prior microporous membranes and battery separators. The methods disclosed herein comprise the following steps: 1.) obtaining a non-porous membrane precursor; 2.) forming a porous biaxially-stretched membrane precursor from the non-porous membrane precursor; 3.) performing at least one of (a) calendering, (b) an additional machine direction (MD) stretching, (c) an additional transverse direction (TD) stretching, and (d) a pore-filling on the porous biaxially stretched precursor to form the final microporous membrane. The microporous membranes or battery separators described herein may have the following desirable balance of properties, prior to application of any coating: a TD tensile strength greater than 200 or 250 kg/cm2, a puncture strength greater than 200, 250, 300, or 400 gf, and a JIS Gurley greater than 20 or 50 s.
Inventors:
Sammy, Barry Jay.
Takahiko Kondo
mason, william john
Xiao, Kan Karen
Robert Moran
Polly, Jeffrey Gee.
Step, Brian Earl.
Stokes, Christopher Kay.
Chang, Xiao Ming
Takahiko Kondo
mason, william john
Xiao, Kan Karen
Robert Moran
Polly, Jeffrey Gee.
Step, Brian Earl.
Stokes, Christopher Kay.
Chang, Xiao Ming
Application Number:
JP2019565268A
Publication Date:
September 07, 2023
Filing Date:
May 24, 2018
Export Citation:
Assignee:
Celguard LLC
International Classes:
H01M50/489; C08J9/00; H01G11/52; H01M50/446; H01M50/451; H01M50/457; H01M50/494
Domestic Patent References:
| JP2013527260A | ||||
| JP2013057045A | ||||
| JP2015536552A | ||||
| JP2013532897A |
Foreign References:
| WO2015160908A1 | ||||
| WO2000049073A1 | ||||
| WO2008059806A1 | ||||
| US20100248002 | ||||
| WO2017049065A1 | ||||
| US20150372275 | ||||
| WO2009048175A1 |
Attorney, Agent or Firm:
田中 秀▲てつ▼
Hajime Hirose
Yuki Yamada
Ryu Kobayashi
Tetsuya Mori
Hajime Hirose
Yuki Yamada
Ryu Kobayashi
Tetsuya Mori