Title:
POROUS MEMBRANE FOR SECONDARY BATTERY, SLURRY FOR SECONDARY BATTERY POROUS MEMBRANE AND SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2012/115252
Kind Code:
A1
Abstract:
The porous membrane according to the present invention comprises non-conductive particles, a binder, and a water-soluble polymer, and is characterized in that: the three dimensions of the non-conductive particles, namely the length (L), thickness (t), and width (b), are such that the length (L) is 0.1 to 0 μm, the ratio (b/t) of the width (b) and the thickness (t) is 1.5 to 100; the binder is a copolymer containing (meth)acrylonitrile monomer units and (meth)acrylic acid ester monomer units; and the water-soluble polymer contains sulfonic acid groups, and has a weight average molecular weight of 1000 to 15000. The slurry for a porous membrane according to the present invention is characterized by being formed by dispersing the non-conductive particles, the binder, and the soluble polymer, in water. Thus, the present invention provides: a porous membrane that can be formed into a thin film, has an excellent sliding property, and generates few particles; and a slurry for porous membranes which is capable of producing porous membrane easily and quickly, and has excellent storage stability.
Inventors:
TOYODA YUJIRO (JP)
Application Number:
PCT/JP2012/054653
Publication Date:
August 30, 2012
Filing Date:
February 24, 2012
Export Citation:
Assignee:
ZEON CORP (JP)
TOYODA YUJIRO (JP)
TOYODA YUJIRO (JP)
International Classes:
H01M4/13; H01M10/0566; H01M50/417; H01M50/42; H01M50/423
Domestic Patent References:
| WO2012029805A1 | 2012-03-08 |
Foreign References:
| JP2011144245A | 2011-07-28 | |||
| JP4569718B2 | 2010-10-27 | |||
| JP2008210791A | 2008-09-11 | |||
| JP2005327680A | 2005-11-24 |
Other References:
See also references of EP 2680343A4
Attorney, Agent or Firm:
MAEDA, Hitoshi et al. (JP)
Hitoshi Maeda (JP)
Hitoshi Maeda (JP)
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Claims: