리튬 2차 전지 정극으로 이용한 Polypyrrole의 전기화학적 특성

Electrochemical Properties of Polypyrrole Cathode for Lithium Secondary Batteries

Polypyrrole films were electrochemically synthesized under a constant current condition ranging from 50 ${\mu}$A/$\textrm{cm}^2$ to 2 mA/$\textrm{cm}^2$ with resultant high electrical conductivity about 100 S/cm. Specific energy of 70 Wh/kg and Ah efficiency of 97% were achieved during the cycling using liquid electrolyte system. On the other hand, consequences of the cycling were 51 Wh/kg and 95% using PEO$\sub$8/LiClO$_4$PC$\sub$5/EC$\sub$5/ solid electrolyte system. Polypyrrole film can be cycled stable and Ah efficiency is excellent, so it can be applicable to the cathode of Lithium secondary batteries.