| 초록 |
Recently, polymer electrolyte membrane fuel cells are aiming at their operation under elevated temperatures and anhydrous conditions. None of polymer membranes developed to date have shown feasibility under such conditions because of the loss of proton conductivity. In this regard, phosphonic acid functionalized polymers have attracted attention by taking into account its amphoteric characteristic and high degree of self-dissociation, enabling the proton conduction under dry conditions. In this study, we synthesize a series of phosphonated polymers where the number density and position of phosphonic acid groups were precisely controlled. The morphology and ionic conductivity of the synthesized polymer were investigated to propose the designs of phosphonated polymers with maximized structural diffusion of protons so as to utilize for anhydrous proton conducting membranes. |
