| 초록 |
A polythiophene-based conductive polymer having both ionic and electronic conductivity was successfully synthesized and characterized. Thermal and electrochemical properties of the polymer were investigated by various techniques such as DSC, EIS and four probe point test. The polymer shows low Tg value with the ionic conductivity of 3.7x10-5 S/cm at 30 oC due to a presence of PEG, and it also has a sufficient electronic conductivity of 8.7x10‑8 S/cm at room temperature. The polymer was utilized as a cathode binder for lithium-ion battery, resulting in higher capacity and more stable cell performances compared to PVDF binder. We believe that the polythiophene having both ionic and electronic conductivity can be a promising polymer binder for all-solid lithium-ion battery system, reducing the high interfacial resistance between the solid electrolyte and electrode. |
