PROTON CONDUCTING INORGANIC MATERIAL, POLYMER NANO-COMPOSITE MEMBRANE INCLUDING THE SAME, AND FUEL CELL ADOPTING THE SAME

摘要

Provided are a hydrogen ion conductive inorganic material having an interlayered structure, its preparation method, a polymer nanocomposite membrane using the inorganic material, and a fuel cell containing the nanocomposite membrane which is improved in energy density and efficiency. The hydrogen ion conductive inorganic material is such that a sulfonic acid group-containing moiety having a hydrogen ion conductivity is introduced into the interlayer of an inorganic material having a nanometer-sized interlayer distance, wherein the sulfonic acid group-containing moiety is directly connected with the inorganic material by an ether bond (-O-). Preferably the sulfonic acid group-containing moiety is represented by -O-AR1SO3H or -O-C(R2)(X)C(Y1)(Y2)SO3H, wherein R is a substituted or unsubstituted C1-C12 alkylene or alkenylene group; A is -C(R')(R'')- or -C=O-; and R2 is F, Cl, SF5, =SF4, SF4Cl, CF3, CF2CF3, H(CF2)4, a Cl-C12 alkyl, halogenated alkyl, alkenyl or halogenated alkenyl group, CF2OSO2F, (CF2)4CHFSO2F, CF2CF2CHFSO2F, CF2CHFSO2F, CF2OCF(CF3)CF3, CF2C(=CF)2F, CF2OCF3, CF2C(F)(Cl)CF2CCl2F, or CH2CH(Cl)CH2Cl.