| 초록 |
Recently, growing demands on efficient and safe energy storage systems promote the development of advanced lithium ion batteries composed of non-flammable polymeric electrolytes. In particular, solid-state block copolymer electrolytes have been investigated extensively to achieve synergistic effects of high mechanical strength and high ionic conductivity. Using phase separation behavior of block copolymer electrolytes was also highlighted as future avenue to improve ion transport efficiency. Herein, we synthesized a set of poly(styrene-b-ethylene oxide) (PS-b-PEO) block copolymers with modified terminal group of PEO chain. The alteration of a single terminal group resulted in noticeable changes in self-assembly, ascribed to the modulated interactions and the segregation strength. Ionic conductivities of the end-functionalized block copolymer electrolytes further revealed the advantage of having well-defined interfaces in the morphology to obtain less tortuous ion-conduction pathways. |
