| 초록 |
We have synthesized VI-co-TFEMA-co-DVB (VTD) copolymer using vinylimidazole (VI), trifluoroethylmethacrylate (TFEMA) and divinylbenzene (DVB) by solution polymerization. VTD copolymer solution was quternarized with bromoethane (QVTD) and QVTD anion exchange membrane was prepared by casting method. The structure of synthesized solution and the thermal stability of prepared membrane were confirmed by FT-IR, 1H-NMR spectrometer and TGA analyzer. The membrane properties including bursting strength, thermal property, chemical resistance, water content, ion exchange capacity, electrical resistance and ion conductivity were measured. The chemical resistances of membranes were better than that of commercial membrane (AMX). After the charge-discharge of 150 cycles, the maximum current efficiency, voltage efficiency, energy efficiency and discharge capacity from all-vanadium redox flow battery test were 94.6, 79.6, 75.3 and 47.1%, respectively. |
