公开(公告)号：US20170155118A1

公开(公告)日：2017-06-01

申请号：US15357708

申请日：2016-11-21

申请人： Sumitomo Chemical Company, Limited

发明人： Hirohiko HASEGAWA

IPC分类号： H01M2/16

CPC分类号： H01M2/1686 ,  H01M2/1653 ,  H01M2/166 ,  H01M10/0525

摘要： Provided is a nonaqueous electrolyte secondary battery laminated separator including a laminated porous film including a porous film and a porous layer. The piercing strength (S) of the laminated porous film satisfies Formula (1): 2 gf≦Sp−S≦25 gf, and the piercing strength (Sp) of the porous film after removal of the porous layer from the laminated porous film satisfies Formula (2): 300 gf≦S≦400 gf. The nonaqueous electrolyte secondary battery laminated separator is excellent in output characteristic, shutdown characteristic, and piercing strength.

公开(公告)号：US20170155109A1

公开(公告)日：2017-06-01

申请号：US15359982

申请日：2016-11-23

申请人： Sumitomo Chemical Company, Limited

发明人： Hirohiko HASEGAWA

IPC分类号： H01M2/16 ,  H01M10/0525

CPC分类号： H01M2/1653 ,  H01M2/145 ,  H01M10/05

摘要： Provided is a nonaqueous electrolyte secondary battery separator that has (i) an excellent ion permeability and (ii) reduced occurrence of a leak defect despite a small thickness. The nonaqueous electrolyte secondary battery separator includes a porous film containing polyolefin as a main component, the nonaqueous electrolyte secondary battery separator having a Gurley value within a range of 50 sec/100 cc to 200 sec/100 cc, the nonaqueous electrolyte secondary battery separator having a thickness within a range of 3 μm to 16 μm, the nonaqueous electrolyte secondary battery separator satisfying 0.85≦((SMD/Sm)+(STD/Sm))/2≦0.91.