Presentation Information
[16p-M_103-11]Essential Nature of Ionic Channel Continuity in Organized Structures
〇Yuki Nagao1, Kazuma Gotoh1, Aoki Kentaro1 (1.JAIST)
Keywords:
Ionic conduction channel,Organized structure,Ion transport mechanism
Continuous ionic channel design based on organized structures has been widely employed as an effective strategy to achieve high ion conductivity in various material systems. However, whether this concept is universally applicable regardless of ion species has not been sufficiently clarified. In this presentation, sulfonated polyimide is used as a model material to compare proton- and lithium-ion conducting systems with identical polymer backbones. By systematically controlling molecular weight, the relationship between structural organization and ion transport behavior is investigated. Ionic conductivity measurements combined with pulsed-field gradient NMR reveal that the effectiveness of channel continuity strongly depends on the dominant transport mechanism. These results indicate that structural continuity alone is insufficient as a universal design principle and that ion-specific transport mechanisms must be considered in designing ion-conductive materials.