CNT얀-전도성고분자 코어쉘 섬유 개발 및 에너지 저장 응용
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윤명한 교수 광주과학기술원 CNT (carbon nanotubes) yarns are one of the most commonly used electrodes for fiber-type energy storage devices as they exhibit mechanical flexibility/durability, light weight, excellent electrical conductivity, and thermal/chemical stability. Nonetheless, CNT yarns show relatively low capacitance as they have electrical double layer capacitance only. Herein, we developed the CNT yarn-PEDOT:PSS (poly(3,4 ethylenedioxythiophene):poly(styrene sulfonate)) core-shell fibers with excellent electrical conductivity and high specific capacitance. The core-shell fibers were fabricated by combining the CNT yarns with enhanced wettability (core) and PEDOT:PSS fibers with self-fusion property (shell). The resultant core-shell fibers showed stable charging/discharging behaviors with minimal voltage drop and capacitance degradation. These fibers can be employed for flexible power sources in wearable and textile electronics. |