Polybenzimidazolium‐Based Solid Electrolytes

PURPOSE: Polybenzimidazolium is provided to provide a polymer electrolyte with excellent performance and stability. CONSTITUTION: Polybenzimidazolium has a structure indicated in chemical formula 1 or chemical formula 2. In the chemical formulas, A is a direct bond or oxygen, B is a diacid group having 1-5 heteroatoms or diacid group containing nine or more carbon atoms, each of R1-R4 is independently hydrogen, a C1-6 alkyl group or aromatic substituent group, X- is anion selected from halogen, OH-, carbonate, hydrogen carbonate, sulfate, acetate, formate, methanolate and ethnolate, and n is an integer from 1 or more. [Reference numerals] (AA) R1 or unsubstituted; (BB, EE) R3 or unsubstituted; (CC) R2 or unsubstituted; (DD, FF) R4 or unsubsituted