Title:
リチウムイオン電池セパレータ
Document Type and Number:
Japanese Patent JP6841706
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a lithium ion battery separator having a nonwoven fabric base and an inorganic particle layer, which is hard to cause a defect in the inorganic particle layer and low in internal resistance.SOLUTION: A lithium ion battery separator comprises: a nonwoven fabric base; an inorganic particle layer A having an average particle diameter of 2.0 μm or larger and 4.0 μm or smaller, and containing a magnesium hydroxide and an organic polymer binder; and an inorganic particle layer B having an average particle diameter of 0.5 μm or larger and smaller than 2.0 μm, and containing a magnesium hydroxide and an organic polymer binder, provided that the inorganic particle layers are laminated over one face of the nonwoven fabric base in this order. A content of the organic polymer binder in the inorganic particle layer A is larger than a content of the organic polymer binder in the inorganic particle layer B.SELECTED DRAWING: None
Inventors:
Tomohiro Sato
Hideaki Saegusa
Hideaki Saegusa
Application Number:
JP2017068285A
Publication Date:
March 10, 2021
Filing Date:
March 30, 2017
Export Citation:
Assignee:
Mitsubishi Paper Mills Co., Ltd.
International Classes:
H01M50/409
Domestic Patent References:
| JP2016171056A | ||||
| JP2014180822A | ||||
| JP2015524991A | ||||
| JP2012134024A |
Foreign References:
| WO2016043142A1 | ||||
| WO2005011043A1 | ||||
| WO2018047742A1 |