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首页> 外文期刊>RSC Advances >Design and fabrication of polypyrrole/expanded graphite 3D interlayer nanohybrids towards high capacitive performance
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Design and fabrication of polypyrrole/expanded graphite 3D interlayer nanohybrids towards high capacitive performance

机译：聚吡咯/膨胀石墨3D层间纳米冬冬林对高电容性能的设计与制造

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摘要

Polypyrrole/expanded graphite (PPy/EG) nanohybrids, with a hierarchical structure of a three dimensional EG framework with a thick PPy coating layer, have been synthesized via a vacuum-assisted intercalation in situ oxidation polymerization method. In the synthesis, pyrrole monomers were intercalated into the irregular pores of EG with the assistance of a vacuum pump. Subsequently, the intercalated pyrrole monomers assembled on both sides of the EG nanosheets and formed PPy by an in situ polymerization method. As electrode materials, the typical PPy/EG10 sample with an EG content of 10% had a high specific capacitance of 454.3 F g(-1) and 442.7 F g(-1) (1.0 A g(-1)), and specific capacitance retention rate of 75.9% and 73.3% (15.0 A g(-1)) in 1 M H2SO4 and 1 M KCl electrolytes, respectively. The two-electrode symmetric supercapacitor showed a high energy density of 47.5 W h kg(-1) at a power density of 1 kW kg(-1), and could retain superb stability after 2000 cycles. The unique self-supporting structure feature and homogeneous PPy nanosphere coating combined the contributions of electrochemical double layer capacitance and pseudo-capacitance, which made the nanohybrids an excellent electrode material for high performance energy storage devices.
机译：通过真空辅助嵌入方法合成，通过原位氧化聚合方法的真空辅助嵌入合成，具有三维EG框架的三维EG框架的分层结构的聚吡咯/膨胀石墨（PPY / EG）纳米组织。在合成中，吡咯单体嵌入例如真空泵辅助的不规则孔中。随后，嵌入的吡咯单体在例如纳米晶片的两侧组装并通过原位聚合方法形成PPY。作为电极材料，具有例如10％含量为10％的典型PPY / EG10样品具有454.3fg（-1）和442.7f g（-1）（1.0ag（-1））和特定的高电容电容保持率为75.9％和73.3％（15.0Ag（-1））分别在1M H 2 SO 4和1M KCl电解质中。双电极对称超级电容器以1kW kg（-1）的功率密度显示出47.5Wh kg（-1）的高能量密度，并且可以在2000次循环后保持稳定的稳定性。独特的自支撑结构特征和均匀的PPY纳米涂层结合了电化学双层电容和伪电容的贡献，这使得纳米杂于高性能储能装置的优异电极材料。

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  • 来源
    《RSC Advances》 |2019年第40期|共10页
  • 作者

    Wang Jue; Fu Dong; Ren Binqiao; Yu Ping; Zhang Xiaochen; Zhang Weijun; Kan Kan;

  • 作者单位

    Heilongjiang Acad Sci Inst Adv Technol Harbin 150020 Heilongjiang Peoples R China;

    Heilongjiang Acad Sci Inst Adv Technol Harbin 150020 Heilongjiang Peoples R China;

    Heilongjiang Acad Sci Inst Adv Technol Harbin 150020 Heilongjiang Peoples R China;

    Heilongjiang Acad Sci Inst Adv Technol Harbin 150020 Heilongjiang Peoples R China;

    Heilongjiang Acad Sci Inst Adv Technol Harbin 150020 Heilongjiang Peoples R China;

    Heilongjiang Acad Sci Inst Adv Technol Harbin 150020 Heilongjiang Peoples R China;

    Heilongjiang Acad Sci Inst Adv Technol Harbin 150020 Heilongjiang Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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