SEPARATOR FOR NONAQUEOUS SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a separator superior in the viewpoint of securing safety and improving ion conductivity in a nonaqueous secondary battery. SOLUTION: A porous inner space of a fine porous body composed of an inorganic material occupying 4%-30% in a volume percentage is filled by aerogel occupying 1%-20% in a volume percentage, and the porosity is made to be 60%-95% and moreover the thickness to be 5μm-200μm. COPYRIGHT: (C)2011,JPO&INPIT