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슈퍼커패시터용 폐면 티셔츠로부터 질소 도핑된 다공성 탄소 직물의 제조 및 전기화학 특성 평가
장형석,황아름,이병민,윤제문,최재학,Chang, Hyeong-Seok,Hwang, Ahreum,Lee, Byoung-Min,Yun, Je Moon,Choi, Jae-Hak 한국재료학회 2021 한국재료학회지 Vol.31 No.9
Hierarchically porous carbon materials with high nitrogen functionalities are extensively studied as high-performance supercapacitor electrode materials. In this study, nitrogen-doped porous carbon textile (N-PCT) with hierarchical pore structures is prepared as an electrode material for supercapacitors from a waste cotton T-shirt (WCT). Porous carbon textile (PCT) is first prepared from WCT by two-step heat treatment of stabilization and carbonization. The PCT is then nitrogen-doped with urea at various concentrations. The obtained N-PCT is found to have multi-modal pore structures with a high specific surface area of 1,299 m<sup>2</sup> g<sup>-1</sup> and large total pore volume of 1.01 cm<sup>3</sup> g<sup>-1</sup>. The N-PCT-based electrode shows excellent electrochemical performance in a 3-electrode system, such as a specific capacitance of 235 F g<sup>-1</sup> at 1 A g<sup>-1</sup>, excellent cycling stability of 100 % at 5 A g<sup>-1</sup> after 1,000 cycles, and a power density of 2,500 W kg<sup>-1</sup> at an energy density of 3.593 Wh kg<sup>-1</sup>. Thus, the prepared N-PCT can be used as an electrode material for supercapacitors.