MULTILAYERED HEAT-RESISTANT SEPARATOR ELEMENT AND METHOD FOR MANUFACTURING SAME

• Main Authors: ITOU Shingo, SAKAMOTO Kazuyuki, FUKUDA Hirokazu, ENOKI Nobuo
• Format: Patent
• Language: English; French; German
• Published: 01.07.2020
• Subjects: BASIC ELECTRIC ELEMENTS; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The objective of the present invention is to provide a multilayered heat-resistant separator element having minimized warpage and curling. The present invention is a multilayered heat-resistant separator element obtained by laminating an inorganic heat-resistant layer on at least one surface of a substrate film comprising a polyolefin microporous membrane having an elongation of 2% or less when tensioned at 10 N/mm 2 at 100 °C, the curl height of the multilayered heat-resistant separator element not exceeding 10 mm. During manufacturing of the multilayered heat-resistant separator element, the inorganic heat-resistant layer is dried and solidified at a temperature of 80 to 120°C and a tensile force of 4-10 N/mm 2 .