Title:
リチウムイオン二次電池用セパレータ及びそれを用いてなるリチウムイオン二次電池
Document Type and Number:
Japanese Patent JP5767222
Kind Code:
B2
Abstract:
Disclosed is a separator that is for a lithium ion secondary battery and that has low water content, strong mechanical strength, and an excellent internal resistance and rate of internal short-circuit failure, in particular, excellent cycle characteristics and excellent discharge characteristics and variation thereof at high rates. The separator comprises a porous sheet containing 10-90 mass% of a synthetic fiber and 10-90 mass% of a solvent-spun cellulose fiber having a modified freeness of 0-250 ml measured in compliance with JIS P8121 when the sample concentration is not 0.1%, and uses an 80 mesh wire screen having 0.18 mm apertures and a wire diameter of 0.14 mm as a plate sieve. Further disclosed is a lithium ion secondary battery using same.
Inventors:
Masanobu Matsuoka
Tomohiro Sato
Kato Kazumi
Kasako Emiko
Masatoshi Midorikawa
Matsuda Hakushi
Blacksmith Hiroo
Hirokazu Yamamoto
Hiroaki Watanabe
Takahiro Tsukuda
Ikuo Fujita
Kenji Hyodo
Tomohiro Sato
Kato Kazumi
Kasako Emiko
Masatoshi Midorikawa
Matsuda Hakushi
Blacksmith Hiroo
Hirokazu Yamamoto
Hiroaki Watanabe
Takahiro Tsukuda
Ikuo Fujita
Kenji Hyodo
Application Number:
JP2012524600A
Publication Date:
August 19, 2015
Filing Date:
July 08, 2011
Export Citation:
Assignee:
Mitsubishi Paper Mills Co., Ltd.
International Classes:
D01F2/00; D01F8/14; D21H11/18; D21H13/08; D21H13/10; D21H13/24; H01M50/414; H01M50/429
Domestic Patent References:
| JPH06163324A | 1994-06-10 | |||
| JP2007067389A | 2007-03-15 | |||
| JP2006236808A | 2006-09-07 | |||
| JP2008186707A | 2008-08-14 | |||
| JP2000331663A | 2000-11-30 | |||
| JP2000003834A | 2000-01-07 | |||
| JPH06163324A | 1994-06-10 | |||
| JP2007067389A | 2007-03-15 | |||
| JP2006236808A | 2006-09-07 | |||
| JP2008186707A | 2008-08-14 | |||
| JP2000331663A | 2000-11-30 | |||
| JP2000003834A | 2000-01-07 |
Foreign References:
| WO2011046066A1 | 2011-04-21 | |||
| WO2007061108A1 | 2007-05-31 | |||
| WO2010044264A1 | 2010-04-22 | |||
| WO2009060988A1 | 2009-05-14 | |||
| WO2011046066A1 | 2011-04-21 | |||
| WO2007061108A1 | 2007-05-31 | |||
| WO2010044264A1 | 2010-04-22 | |||
| WO2009060988A1 | 2009-05-14 |
Attorney, Agent or Firm:
Shizuo Nakamura