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Comparison Of Metal Oxide-Carbon Composites Derived From Natural Alginate Gels

Author

Listed:
  • XIAO-FENG TANG

    (Department of Materials Science, Fudan University, Shanghai 200433, P. R. China)

  • ZHEN-GUO YANG

    (Department of Materials Science, Fudan University, Shanghai 200433, P. R. China)

  • JIA-HUI LIANG

    (#x2020;College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China)

Abstract

Metal oxide-carbon composites (MOCCs) derived from sodium alginate gels were prepared through a facile and green ionic gelation method. Various polyvalent cations (Mn2+, Fe3+, and Zn2+) were used to crosslink sodium alginate to produce gels, following which the gels were carbonized under nitrogen flow to yield MOCCs. X-ray diffraction, scanning electron microscopy, and Raman spectra can character the as-prepared materials’ structural and morphological characters and thermogravimetric analysis. The electrochemical behavior of the as-prepared materials was studied by applying to cyclic voltammetry, galvanostatic charge–discharge measurements, and electrochemical impedance spectroscopy in 6M KOH electrolyte. The highest specific capacitance (161F g−1 at 0.5A g−1) was obtained for the Fe oxide-doped carbon material (MOCC-Fe), which displayed a good life cycle with only a 10% capacitance decline after 2000 cycles.

Suggested Citation

  • Xiao-Feng Tang & Zhen-Guo Yang & Jia-Hui Liang, 2019. "Comparison Of Metal Oxide-Carbon Composites Derived From Natural Alginate Gels," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 26(03), pages 1-9, April.
    • Handle: RePEc:wsi:srlxxx:v:26:y:2019:i:03:n:s0218625x18501615
    DOI: 10.1142/S0218625X18501615
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