The invention addresses the problem of providing a polyimide precursor, a polyimide precursor solution, and a mixture slurry, each capable of more firmly binding active material particles to a current collecting body. The polyimide precursor solution accor...

The present invention relates to a method for producing an aqueous polyimide precursor solution composition, comprising reacting a tetracarboxylic dianhydride and a diamine, which has a solubility in water at 25°C of 0.1 g/L or more, in the presence of an...

An ion-conducting membrane for electrochemical applications is based on aromatic polyimide or copolyimide polymers. An ion-conducting membrane for electrochemical applications is based on aromatic polyimide or copolyimide polymers comprising units of formu...

A material such as imidazole (nitrogen-containing heterocyclic compound), which has at least one lone pair, is dispersed in a basic solid polymer such as polybenzimidazole. The mole number of imidazole per gram of polybenzimidazole is less than 0.0014 mol,...