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首页> 外文期刊>RSC Advances >Porous carbon derived from metal-organic framework@graphene quantum dots as electrode materials for supercapacitors and lithium-ion batteries
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Porous carbon derived from metal-organic framework@graphene quantum dots as electrode materials for supercapacitors and lithium-ion batteries

机译:从金属有机框架衍生的多孔碳@ Graphene量子点作为超级电容器和锂离子电池的电极材料

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摘要

The C@GQD composite was prepared by the combination of metal-organic framework (ZIF-8)-derived porous carbon and graphene quantum dots (GQDs) by a simple method. The resulting composite has a high specific surface area of 668 m(2) g(-1) and involves numerous micro- and mesopores. As a supercapacitor electrode, the material showed an excellent double-layer capacitance and a high capacity retention of 130 F g(-1) at 2 A g(-1). The excellent long-term stability was observed even after approximate to 10000 charge-discharge cycles. Moreover, the composite as an anode material for a lithium-ion battery exhibited a good reversible capacity and outstanding cycle stability (493 mA h g(-1) at 100 mA g(-1) after 200 cycles). The synergistic effect of a MOF-derived porous carbon and GQDs was responsible for the improvement of electrochemical properties.
机译:通过简单的方法通过金属 - 有机框架(ZIF-8)的多孔碳和石墨烯量子点(GQDS)的组合来制备C @ GQD复合材料。 所得复合材料具有668m(2 )g(-1)的高比表面积,并且涉及许多微型和中孔。 作为超级电容器电极,该材料显示出优异的双层电容和高容量保持在2Ag(-1)时为130 f g(-1)。 甚至在近似10000充放电循环之后也观察到优异的长期稳定性。 此外,作为锂离子电池的阳极材料的复合材料表现出良好的可逆容量和未突出的循环稳定性(在200次循环之后在100mA G(-1)下的突出循环稳定性(493mA H(-1))。 MOF衍生的多孔碳和GQD的协同作用负责改善电化学性质。

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  • 来源
    《RSC Advances》 |2019年第17期|共7页
  • 作者单位

    Jiangsu Univ Sci &

    Technol Sch Environm &

    Chem Engn Zhenjiang 212003 Jiangsu Peoples R China;

    Jiangsu Univ Sci &

    Technol Sch Environm &

    Chem Engn Zhenjiang 212003 Jiangsu Peoples R China;

    Jiangsu Univ Sci &

    Technol Sch Mat Sci &

    Engn Zhenjiang 212003 Jiangsu Peoples R China;

    Shanghai Waigaoqiao Shipbldg Co Ltd Shanghai 200137 Peoples R China;

    Shanghai Waigaoqiao Shipbldg Co Ltd Shanghai 200137 Peoples R China;

    Shanghai Waigaoqiao Shipbldg Co Ltd Shanghai 200137 Peoples R China;

    Jiangsu Univ Sci &

    Technol Sch Environm &

    Chem Engn Zhenjiang 212003 Jiangsu Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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