POROUS POLYIMIDE FILM, SEPARATOR FOR LITHIUM ION SECONDARY BATTERY, LITHIUM ION SECONDARY BATTERY, AND ALL SOLID STATE BATTERY

• Main Authors: KAJIMA YASUNOBU, SUGAWARA HIROSHI, HIROSE EIICHI, YOSHIMURA KOSAKU
• Format: Patent
• Language: English; Japanese
• Published: 13.08.2020
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOSITIONS BASED THEREON; ELECTRICITY; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

To provide a porous polyimide film that can suppress a decrease of battery capacity due to repeated charging/discharging when a secondary battery is used.SOLUTION: In a pore distribution measured by a mercury press-in method, a pore distribution width represented by a square root ((D/D)) of a ratio...