Title:
POROUS FILM, SEPARATOR FOR SECONDARY BATTERIES, AND SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2019/065787
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a separator for secondary batteries at low cost, said separator having excellent battery characteristics by achieving excellent adhesion between a porous substrate and a porous layer, thereby enabling the porous layer to sufficiently exhibit the characteristics thereof. A porous film which is obtained by laminating a porous layer on at least one surface of a porous substrate, said porous layer containing an organic resin that is different from the resin that constitutes the porous substrate. This porous film is configured such that: the projection height of the porous layer at the interface between the porous substrate and the porous layer is 200 nm or more; and the inter-projection distance of the porous layer at the interface between the porous substrate and the porous layer is 1 μm or more.
Inventors:
IKOMA KEI (JP)
KAI NOBUYASU (JP)
TSUKUDA AKIMITSU (JP)
KAI NOBUYASU (JP)
TSUKUDA AKIMITSU (JP)
Application Number:
PCT/JP2018/035816
Publication Date:
April 04, 2019
Filing Date:
September 26, 2018
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B32B5/28; H01M50/417; H01M50/423; H01M50/443; H01M50/451; H01M50/457; H01M50/463; H01M50/489; H01M50/491
Domestic Patent References:
| WO2014132791A1 | 2014-09-04 | |||
| WO2015050076A1 | 2015-04-09 | |||
| WO2017051514A1 | 2017-03-30 | |||
| WO2007052663A1 | 2007-05-10 |
Foreign References:
| JP2015228358A | 2015-12-17 | |||
| JP2014160565A | 2014-09-04 | |||
| JP4560852B2 | 2010-10-13 | |||
| JP2013046998A | 2013-03-07 | |||
| JP5183435B2 | 2013-04-17 | |||
| JP2016130027A | 2016-07-21 | |||
| JP2017189896A | 2017-10-19 |
Other References:
See also references of EP 3690982A4
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
Download PDF: