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首页> 外文期刊>Advanced energy materials >Interconnected Frameworks with a Sandwiched Porous Carbon Layer/Graphene Hybrids for Supercapacitors with High Gravimetric and Volumetric Performances
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Interconnected Frameworks with a Sandwiched Porous Carbon Layer/Graphene Hybrids for Supercapacitors with High Gravimetric and Volumetric Performances

机译：具有高重量和体积性能的超级电容器的夹层多孔碳层/石墨烯混合体互连框架

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摘要

A facile approach to synthesize porous disordered carbon layers as energy storage units coating on graphene sheets to form interconnected frameworks by one-step pyrolysis of the mixture of graphene oxide/polyaniline and KOH is presented. As effective energy storage units, these porous carbon layers play an important role in enhancing the electrochemical performances. The obtained porous carbon material exhibits a high specific surface area (2927 m2 g−1), hierarchical interconnected pores, moderate pore volume (1.78 cm3 g−1), short ion diffusion paths, and a high nitrogen level (6 at%). It displays both unparalleled gravimetric (481 F g−1) and outstanding volumetric capacitance (212 F cm−3) in an aqueous electrolyte. More importantly, the assembled symmetrical supercapacitor delivers not only high gravimetric (25.7 Wh kg−1 based on total mass of electroactive materials) but also high volumetric energy densities (11.3 Wh L−1) in an aqueous electrolyte. Furthermore, the assembled asymmetric supercapacitor yields a maximum energy density up to 88 Wh kg−1, which is, to the best of our knowledge, the highest value so far reported for carbon//MnO2 asymmetric supercapacitors in aqueous electrolytes. Therefore, this novel carbon material holds great promise for potential applications in energy-related technological fields.
机译：提出了一种简便的方法来合成多孔无序碳层，将其作为涂覆在石墨烯板上的储能单元，通过对氧化石墨烯/聚苯胺和KOH的混合物进行一步热解来形成相互连接的骨架。作为有效的能量存储单元，这些多孔碳层在增强电化学性能中起重要作用。所获得的多孔碳材料显示出高的比表面积（2927 m2 g-1），分层的互连孔，适度的孔体积（1.78 cm3 g-1），短的离子扩散路径和高的氮含量（6 at％）。它在水性电解质中显示出无与伦比的重量（481 F g-1）和出色的体积电容（212 F cm-3）。更重要的是，组装的对称超级电容器不仅在水性电解质中提供了高重量（基于电活性材料的总质量为25.7 Wh kg-1），而且还提供了高体积能量密度（11.3 Wh L-1）。此外，组装的不对称超级电容器产生的最大能量密度高达88 Wh kg-1，据我们所知，这是迄今为止水性电解质中碳// MnO2不对称超级电容器所报道的最高值。因此，这种新型碳材料在与能源有关的技术领域中具有潜在的应用前景。

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  • 来源
    《Advanced energy materials》 |2014年第13期|1-10|共10页
  • 作者

    Jun Yan; Qian Wang; Changpeng Lin; Tong Wei; Zhuangjun Fan;

  • 作者单位

    Key Laboratory of Superlight Materials and Surface Technology Ministry of Education College of Material Science and Chemical Engineering Harbin Engineering University Harbin P. R. China;

    Key Laboratory of Superlight Materials and Surface Technology Ministry of Education College of Material Science and Chemical Engineering Harbin Engineering University Harbin P. R. China;

    Key Laboratory of Superlight Materials and Surface Technology Ministry of Education College of Material Science and Chemical Engineering Harbin Engineering University Harbin P. R. China;

    Key Laboratory of Superlight Materials and Surface Technology Ministry of Education College of Material Science and Chemical Engineering Harbin Engineering University Harbin P. R. China;

    Key Laboratory of Superlight Materials and Surface Technology Ministry of Education College of Material Science and Chemical Engineering Harbin Engineering University Harbin P. R. China;

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

    supercapacitors; volumetric capacitance; graphene; energy densities;

    机译：超级电容器;体积电容;石墨烯;能量密度;

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