| 초록 |
Ion-containing polymers with well-organized morphologies have attracted great attention toward a range of electrochemical devices such as fuel cells and lithium-ion batteries. While many research groups have reported the relationship between morphologies and ion transport properties of polymer electrolytes, in most cases, the reported morphologies are characterized by 2D lattices. Here, we investigate the morphology and conductivity of ion-containing polymers with a focus on 3D symmetry. Ill-defined cubic, orthorhombic network (Fddd), and face-centered cubic (fcc) with a majority of ionic phases were achieved for a single sulfonated block copolymer upon the addition of various ionic liquids. Interestingly, among cubic, fcc, and Fddd lattices, the most efficiency ion transport was demonstrated for the samples having fcc phases with the lowest tortuosity of 1. This implies the impact of designing polymer electrolytes to have desired 3D morphology to attain utmost ionic conductivity. |
