LAMINATED POROUS FILM AND SEPARATOR FOR ELECTRICAL ENERGY STORAGE DEVICE

• Main Authors: HIGASHIOJI, TAKUJI, YOKOYAMA, NOZOMI, WAKAHARA, YOKO
• Format: Patent
• Language: English; French; Japanese
• Published: 03.10.2013
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOSITIONS BASED THEREON; ELECTRICITY; GENERAL PROCESSES OF COMPOUNDING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING-UP

The purpose of the present invention is to provide a laminated porous film which is suitable as a separator for an electrical energy storage device and which can ensure excellent battery performance and heat resistance and cost reduction and has high quality. This laminated porous film is provided with a porous layer on at least one surface of a substrate, and is characterized in that the porous layer contains (A) inorganic particles, (B) at least two kinds of water-soluble polymers, and (C) a resin. L'objectif de la présente invention est de fournir un film poreux stratifié qui est approprié en tant que séparateur pour un dispositif de stockage d'énergie électrique et qui peut assurer une excellente performance de batterie et une excellente résistance thermique et une réduction du coût et qui a une qualité élevée. Ce film poreux stratifié comprend une couche poreuse sur au moins une surface d'un substrat, et est caractérisé en ce que la couche poreuse contient (A) des particules inorganiques, (B) au moins deux types de polymères hydrosolubles, et (C) une résine.