Title:
BATTERY SEPARATOR, METHOD FOR MANUFACTURE THEREOF, AND LITHIUM SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2008/029922
Kind Code:
A1
Abstract:
Disclosed is a battery separator which has an insulating layer comprising a fibrous
material having a service temperature limit of 150˚C or higher, an inorganic
microparticle having an insulating property and a binder or, alternatively,
which has an insulating layer comprising a porous layer composed of a thermally
meltable resin, an inorganic microparticle having an insulating property and
a binder. The battery separator has a water content per unit volume of 1 mg/cm3
or less, as measured after maintaining the battery separator under the atmosphere
of 20˚C and 60% RH for 24 hours. By using the battery separator, it becomes
possible to provide a lithium secondary battery which has good reliability and
safety and is excellent in storage properties and charge-discharge cycle properties.
Inventors:
KATAYAMA, Hideaki (())
片山秀昭 (())
KOJIMA, Eri (())
児島映理 (())
片山秀昭 (())
KOJIMA, Eri (())
児島映理 (())
Application Number:
JP2007/067528
Publication Date:
March 13, 2008
Filing Date:
September 07, 2007
Export Citation:
Assignee:
HITACHI MAXELL, LTD. (1-88, Ushitora 1-chomeIbaraki-shi, Osaka 67, 5678567, JP)
日立マクセル株式会社 (〒67 大阪府茨木市丑寅１丁目１番８８号 Osaka, 5678567, JP)
KATAYAMA, Hideaki (())
片山秀昭 (())
KOJIMA, Eri (())
日立マクセル株式会社 (〒67 大阪府茨木市丑寅１丁目１番８８号 Osaka, 5678567, JP)
KATAYAMA, Hideaki (())
片山秀昭 (())
KOJIMA, Eri (())
International Classes:
H01M2/16; H01M10/052; H01M10/0525; H01M10/36
Attorney, Agent or Firm:
IKEUCHI SATO & PARTNER PATENT ATTORNEYS (26th Floor, OAP TOWER8-30, Tenmabashi 1-chome,Kita-ku, Osaka-shi, Osaka 26, 5306026, JP)
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