SEPARATOR FOR NON-AQUEOUS SECONDARY BATTERY, AND NON-AQUEOUS SECONDARY BATTERY

• Main Authors: NISHIKAWA, Satoshi, KURATANI, Rika, MIURA, Mai
• Format: Patent
• Language: English; French; Japanese
• Published: 19.01.2023
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; ELECTRICITY; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; 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; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

This separator for a non-aqueous secondary battery comprises a porous substrate, and an adhesive porous layer containing a polyvinylidene fluoride resin and a filler, where the porous substrate contains fluorine atoms, and when differential scanning calorimetry is performed using the entire polyvinylidene fluoride resin contained in the adhesive porous layer as a sample, two or more endothermic peaks and/or two or more exothermic peaks are observed. Le séparateur pour batterie secondaire non aqueuse de l'invention est équipé d'un substrat poreux, et d'une couche poreuse adhésive contenant une résine à base de fluorure de polyvinylidène et une charge. Le substrat poreux contient des atomes de fluor. Au moins deux pics endothermiques et/ou au moins deux pics exothermiques sont observés lorsque l'ensemble de la résine à base de fluorure de polyvinylidène contenue dans la couche poreuse adhésive est soumis à une analyse calorimétrique différentielle en tant qu'échantillon. 非水系二次電池用セパレータは、多孔質基材と、ポリフッ化ビニリデン系樹脂及びフィラーを含む接着性多孔質層と、を備え、多孔質基材がフッ素原子を含み、接着性多孔質層に含まれるポリフッ化ビニリデン系樹脂全体を試料として示差走査熱量測定をしたとき吸熱ピークが２つ以上及び／又は発熱ピークが２つ以上観測される。