Title:
NONAQUEOUS ELECTROLYTE SECONDARY BATTERY SEPARATOR
Document Type and Number:
Japanese Patent JP2018147686
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To materialize a nonaqueous electrolyte secondary battery separator which can suppress the increase in battery resistance after charge and discharge cycles.SOLUTION: With a nonaqueous electrolyte secondary battery separator, the number of times that a test piece is folded until the length of the test piece is changed by 2.4 cm in a longitudinal direction is 1600 or more, which is measured by a MIT folding endurance tester using, as the test piece, a polyolefin porous film in which the longitudinal direction makes TD direction.SELECTED DRAWING: Figure 1
Inventors:
YOSHIMARU HIROE
Application Number:
JP2017041086A
Publication Date:
September 20, 2018
Filing Date:
March 03, 2017
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO
International Classes:
H01M10/0566; H01M50/417; H01M50/443; H01M50/449; H01M50/463; H01M50/406
Domestic Patent References:
| JP2009123483A | 2009-06-04 | |||
| JP2009123484A | 2009-06-04 | |||
| JP2003103626A | 2003-04-09 | |||
| JP2015120786A | 2015-07-02 | |||
| JP2017002297A | 2017-01-05 | |||
| JP2008214425A | 2008-09-18 | |||
| JPS6186239A | 1986-05-01 | |||
| JP2013234263A | 2013-11-21 |
Foreign References:
| WO2015194504A1 | 2015-12-23 | |||
| WO2007046226A1 | 2007-04-26 | |||
| WO2013146403A1 | 2013-10-03 | |||
| WO2012057037A1 | 2012-05-03 |
Attorney, Agent or Firm:
Kazuya Hasegawa
Kentaro Tsuruta
Kentaro Tsuruta