| 초록 |
We report a highly ion conductive gel polymer electrolytes for supercapacitor, composed of poly(2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl] ethyl methacrylate)-poly(oxyethylene methacryalate) (PBE) copolymer and 1-Ethyl-3-methylimidazolium dicyanmide ionic liquid. When incorporated with EMIM DCA, selective interaction between ether groups and EMIM DCA induced micro-structured morphology, observed by (TEM). Structured morphology effectively suppressed aggregation of EMIM DCA and provide ion transport pathway, which led to fast diffusion of mobile ions. The PBE/EMIM DCA electrolytes showed gel-like morphology, which is suitable to fabricate solid-state, leakage-free supercapacitor. The best performance of supercapacitor using PBE/EMIM DCA electrolytes exhibited higher capacitance (125.1 F g-1) than that of reference PVA/H3PO4 electrolyte (39.5 F g-1) due to its high ion conductivity and good affinity with electrode. |
