Title:
非水系二次電池及びこれに用いるセパレータ
Document Type and Number:
Japanese Patent JP4215718
Kind Code:
B2
Abstract:
A non-aqueous secondary battery separator composed of a porous film made of an organic polymer, which includes a network-like support, swells in the electrolyte solution and retains the electrolyte solution, wherein the network-like support has a mean film thickness of 10-30 mu m, a basis weight of 6-20 g/m<2>, a Gurley value of no greater than 10 sec/100 cc, a McMullin number (25 DEG C) of no greater than 10 and a (McMullin number x mean film thickness ( mu m)) product of no greater than 200 mu m, and the separator has a mean film thickness of 10-35 mu m, a basis weight of 10-25 g/m<2> and a Gurley value of no greater than 60 sec/100 cc, or exceeding 60 sec/100 cc and no greater than 500 sec/100 cc. Both battery characteristics and safety are achieved by establishing a specific electrochemical relationship between the effective active substance content of the battery system and the overcharge-preventing function characteristic values.
Inventors:
Satoshi Nishikawa
Hiroyuki Motomoto
Takahiro Omichi
Hiroyuki Motomoto
Takahiro Omichi
Application Number:
JP2004530596A
Publication Date:
January 28, 2009
Filing Date:
August 21, 2003
Export Citation:
Assignee:
Teijin Limited
International Classes:
H01M4/36; H01M4/485; H01M4/505; H01M4/525; H01M10/05; H01M10/052; H01M10/42; H01M50/414; H01M50/417; H01M50/423; H01M50/426; H01M50/437; H01M50/489; H01M50/449
Domestic Patent References:
| JP2001222988A | ||||
| JP2001332307A | ||||
| JP2001266942A | ||||
| JP2003007279A |
Foreign References:
| WO2001067536A1 |
Attorney, Agent or Firm:
Atsushi Aoki
Takashi Ishida
Yoshio Yoshio
Tetsuji Koga
Masaya Nishiyama
Takashi Ishida
Yoshio Yoshio
Tetsuji Koga
Masaya Nishiyama