Research Article

Polybenzimidazole and Phosphonic Acid Groups-Functionalized Polyhedral Oligomeric Silsesquioxane Composite Electrolyte for High Temperature Proton Exchange Membrane

Figure 4

ATR FT-IR spectra of POSS, Br-POSS, PO(OEt)2-POSS, and PO(OH)2-POSS.