Title:
SEPARATOR FOR ENERGY-STORAGE DEVICE AND ENERGY-STORAGE DEVICE
Document Type and Number:
WIPO Patent Application WO/2007/037309
Kind Code:
A1
Abstract:
Disclosed is a separator for use in an energy-storage device, which comprises a microporous film mainly comprising a polyolefin resin having acid resistance as a backbone material and an inorganic powder capable of increasing the electrolyte-carrying property, wherein the polyolefin resin is produced by a hole-opening agent removing method. The separator has a high void volume and a low resistance while maintaining a satisfactory level of mechanical strength. Also disclosed is an energy-storage device having the separator. The separator is characterized by comprising a microporous film, wherein the microporous film is produced by melting a raw material composition composed mainly of a polyolefin resin, an inorganic powder and a plastisizer under heating to form a sheet, molding the sheet by rolling to form a thin film, removing the plasticizer from the sheet, and molding the sheet by rolling to form a thin film. In the microporous film, the polyolefin resin is contained as a backbone material, the inorganic powder is contained in an amount of 50% by mass or more. The microporous film has micropores having an average pore size of 1 μm or smaller and also has a void volume of 80% or more.
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Inventors:
MATSUNAMI, Taizo (Limited 1-7, Kaigan 2-chome, Minato-k, Tokyo 52, 1058552, JP)
松波 泰三 (〒52 東京都港区海岸二丁目１番７号 日本板硝子株式会社内 Tokyo, 1058552, JP)
INOMOTO, Shunji (Limited 1-7, Kaigan 2-chome, Minato-k, Tokyo 52, 1058552, JP)
松波 泰三 (〒52 東京都港区海岸二丁目１番７号 日本板硝子株式会社内 Tokyo, 1058552, JP)
INOMOTO, Shunji (Limited 1-7, Kaigan 2-chome, Minato-k, Tokyo 52, 1058552, JP)
Application Number:
JP2006/319268
Publication Date:
April 05, 2007
Filing Date:
September 28, 2006
Export Citation:
Assignee:
Nippon Sheet Glass Company, Limited (1-7 Kaigan 2-chome, Minato-ku Tokyo, 52, 1058552, JP)
日本板硝子株式会社 (〒52 東京都港区海岸二丁目１番７号 Tokyo, 1058552, JP)
MATSUNAMI, Taizo (Limited 1-7, Kaigan 2-chome, Minato-k, Tokyo 52, 1058552, JP)
松波 泰三 (〒52 東京都港区海岸二丁目１番７号 日本板硝子株式会社内 Tokyo, 1058552, JP)
日本板硝子株式会社 (〒52 東京都港区海岸二丁目１番７号 Tokyo, 1058552, JP)
MATSUNAMI, Taizo (Limited 1-7, Kaigan 2-chome, Minato-k, Tokyo 52, 1058552, JP)
松波 泰三 (〒52 東京都港区海岸二丁目１番７号 日本板硝子株式会社内 Tokyo, 1058552, JP)
International Classes:
H01G9/02; H01M2/16
Attorney, Agent or Firm:
SHIMIZU, Yoshihiro et al. (3rd Floor, Yashiro Building 14-4, Takadanobaba 2-chom, Shinjuku-ku Tokyo 75, 1690075, JP)
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