POLYIMIDE PRECURSOR SOLUTION, POROUS POLYIMIDE FILM, SEPARATOR FOR SECONDARY BATTERY, AND SECONDARY BATTERY

A polyimide precursor solution includes a polyimide precursor having a glass transition temperature Tg of equal to or higher than 300° C. after imidization, an aqueous solvent containing water, an organic amine compound, and resin particles having a volume average particle size of equal to or less than 100 nm.