POROUS COMPOSITE FILM, SEPARATOR FOR BATTERY, BATTERY, AND POROUS COMPOSITE FILM PRODUCTION METHOD

The purpose of this invention is to provide a porous composite film suitable for a separator for a battery having superior cycle properties. Provided is a porous composite film obtained by layering: a porous substrate; and a porous layer on at least one surface of the porous substrate, said porous l...

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Bibliographische Detailangaben
Hauptverfasser:	MASUDA SHOZO, SHIMIZU YASUKI, TAGUCHI TAKAYUKI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM PERFORMING OPERATIONS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY TRANSPORTING
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Beschreibung
Zusammenfassung:	The purpose of this invention is to provide a porous composite film suitable for a separator for a battery having superior cycle properties. Provided is a porous composite film obtained by layering: a porous substrate; and a porous layer on at least one surface of the porous substrate, said porous layer including a fluorine-containing resin and satisfying the following requirements (i), (ii) and (iii). (i) The porous layer has a cross-section void area distribution D150 value of 0.06-0.38Mum2, and a cross-section void area distribution D190 value of 0.20-1.15Mum2. (ii) The porous layer has a surface pore area distribution D250 value of 0.0060-0.0072Mum2, and a surface pore area distribution D290 value of 0.0195-0.0220Mum2. (iii) The porous layer has a porosity of 50-70%. 本发明提供适合于循环特性优异的电池的隔膜的多孔复合膜。一种多孔复合膜，其为多孔质基材和位于多孔质基材的至少单面上的多孔质层层积而成的多孔复合膜，其中，多孔质层含有含氟树脂，且满足下述条件(i)、(ii)和(iii)。(i)多孔质层的剖面孔隙面积分布的D50的值为0.06μm以上0.38μm以下、且多孔质层的剖面孔隙面积分布的D90的值为0.20μm以上1.15μm以下。(ii)多孔质层的表面细孔面积分布的D50的值为0.0060μm以上0.0072μm以下、且多孔质层的表面细孔面