Study on electrochemical performances of sulfur-containing graphene nanosheets electrodes for lithium-sulfur cells
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서지정보
ㆍ발행기관 : 한국탄소학회
ㆍ수록지정보 : Carbon Letters / 15권 / 2호
ㆍ저자명 : Ki-Soo Son, Seok Kim
ㆍ저자명 : Ki-Soo Son, Seok Kim
목차
1. Introduction2. Experimental
3. Results and Discussion
4. Conclusion
Acknowledgments
References
한국어 초록
Due to their morphology, electrochemical stability, and function as a conducting carbonmatrix, graphene nanosheets (GNS) have been studied for their potential roles in improvingthe performance of sulfur cathodes. In this study, a GNS/sulfur (GNS/S) composite wasprepared using the infiltration method with organic solvent. The structure, morphology andcrystallinity of the composites were examined using scanning electron microscopy, transmissionelectron microscopy, and X-ray diffraction. The electrochemical properties werealso characterized using cyclic voltammetry (CV). The CV data revealed that the GNS/Scomposites exhibited enhanced specific-current density and ~10% higher capacity, in comparisonwith the S-containing, activated-carbon samples. The composite electrode alsoshowed better cycling performance for multiple charge/discharge cycles. The improvementin the capacity and cycling stability of the GNS/S composite electrode is probably related tothe fact that the graphene in the composite improves conductivity and that the graphene iswell dispersed in the composites.영어 초록
Due to their morphology, electrochemical stability, and function as a conducting carbonmatrix, graphene nanosheets (GNS) have been studied for their potential roles in improving
the performance of sulfur cathodes. In this study, a GNS/sulfur (GNS/S) composite was
prepared using the infiltration method with organic solvent. The structure, morphology and
crystallinity of the composites were examined using scanning electron microscopy, transmission
electron microscopy, and X-ray diffraction. The electrochemical properties were
also characterized using cyclic voltammetry (CV). The CV data revealed that the GNS/S
composites exhibited enhanced specific-current density and ~10% higher capacity, in comparison
with the S-containing, activated-carbon samples. The composite electrode also
showed better cycling performance for multiple charge/discharge cycles. The improvement
in the capacity and cycling stability of the GNS/S composite electrode is probably related to
the fact that the graphene in the composite improves conductivity and that the graphene is
well dispersed in the composites.
참고 자료
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