LITHIUM ION SECONDARY BATTERY SEPARATOR, METHOD FOR MANUFACTURING LITHIUM ION SECONDARY BATTERY SEPARATOR, AND LITHIUM ION SECONDARY BATTERY

The present invention provides a lithium ion secondary battery separator superior in heat resistance, which is hard to cause an internal short circuit even under a high-temperature condition, and which can exhibit a separator function with stability even when arranged to be thin in separator thickne...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	HIDEKI AIDA, KIYOKI SASAGAWA, KATSUHIKO IKETANI, SATORU AOYAMA, MASAHITO OZAKI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ADHESIVES BASIC ELECTRIC ELEMENTS CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CORRECTING FLUIDS DYES ELECTRICITY FILLING PASTES INKS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	The present invention provides a lithium ion secondary battery separator superior in heat resistance, which is hard to cause an internal short circuit even under a high-temperature condition, and which can exhibit a separator function with stability even when arranged to be thin in separator thickness, to improve the output characteristics of a lithium ion secondary battery by using the separator,and to manufacture a separator stable in performance with good productivity by forming a uniform inorganic coating film in such a way that a defect, such as a pin hole is produced in the inorganic coating layer. A lithium ion secondary battery separator comprises: a plastic nonwoven fabric; and an inorganic coating layer provided on a surface of the plastic nonwoven fabric. The plastic nonwoven fabric includes synthetic fibers which are 1-10 [Mu]m in average fiber diameter, and 1-20 [Mu]m in average pore diameter (a). The inorganic coating layer and the nonwoven fabric include ceramic fine particles (A) of 0.1-5 [Mu]