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에너지 저장 장치용 탄소 나노 섬유의 새로운 전구체 고분자
정경혜 ( Kyung Hye Jung ),존페라리스 ( John P. Ferraris ) 대구가톨릭대학교 자연과학연구소 2015 자연과학연구논문집 Vol.13 No.1
Supercapacitors fill a unique niche in terms of energy storage because they have high power density and long cyclability but low energy density. Carbon nanofibers are good candidate for supercapacitor electrode materials to improve their energy density. Typically, carbon nanofiber electrodes are prepared by thermal treatments of precursor polymer nanofibers, fabricated by electro spinning. This study introduces poly(acrylonitrile-co-vinylimidazole) as a noble precursor polymer of carbon nanofiber electrode. The polymer solutions were successfully electrospun, and their nanofibrous structure was well preserved after the carbonization step at 1000°C. The carbon nanofibers derived from poly(acrylonitrile-co-vinylimidazole) showed superior specific capacitances, and energy and power densities compared to those from polyacrylonitrile. It is also shown that the copolymer with a feed rate of 75:25 (acrylonitrile:vinylimidazole) is most promising for the carbon nanofiber precursor exhibiting high energy storage performance.