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논문 기본 정보
- 자료유형
- 동향자료
- 저자정보
- 발행연도
- 2016.1
- 수록면
- 66 - 71 (6page)
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The development of nanostructured functional materials derived from biomass and/or waste is of growing importance for creating sustainable energy-storage systems. In this study, nanoporous carbonaceous materials containing numerous heteroatoms were fabricated from waste coffee grounds using a top-down process via simple heating with KOH. The nanoporous carbon nanosheets exhibited notable material properties such as high specific surface area (1960.1 m<sup>2</sup> g<sup>−1</sup>), numerous redox-active heteroatoms (16.1 at% oxygen, 2.7 at% nitrogen, and 1.6 at% sulfur), and high aspect ratios (>100). These unique properties led to good electrochemical performance as supercapacitor electrodes. A specific capacitance of ~438.5 F g<sup>−1</sup> was achieved at a scan rate of 2 mV s<sup>−1</sup>, and a capacitance of 176 F g<sup>−1</sup> was maintained at a fast scan rate of 100 mV s<sup>−1</sup>. Furthermore, cyclic stability was achieved for over 2000 cycles.
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