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Generation three-dimensional nitrogen-doped graphene frameworks as advanced electrode for supercapacitors

机译：生成三维氮掺杂石墨烯骨架作为超级电容器的高级电极

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摘要

Three-dimensional nitrogen-doped graphene frameworks (3DNGFs) hold great promise in the application of supercapacitors for the advantages of superior conductivity, well-connected porous structure, and additional N-containing active sites for charge storage. Nevertheless, the developed techniques for preparing 3DNGFs always suffer from the drawbacks of high cost or complex processes for large-scale application. Herein, a new and cost-effective method has been developed to massively prepare monolithic 3DNGFs by a simple and scalable electrochemical oxidation process. Benefiting from the enhanced electrical conductivity, the increase in the pore volume for fast diffusion increased the electrode-electrolyte contact area and additional active sites resulting from the incorporation of nitrogen species, the 3DNGFs showed a high specific capacitance of 2250.3 mF/cm(2) at 4 mA/cm(2) , with good rate capability. Furthermore, this 3DNGFs electrode also owns an excellent long-term cycling stability that can retain more than 97.5% of its original capacitance after 10,000 cycles.
机译：三维氮掺杂石墨烯骨架（3DNGF）在超级电容器的应用中具有广阔的前景，其优点是具有优异的电导率，良好连接的多孔结构以及用于电荷存储的其他含氮活性位点。然而，用于制备3DNGF的开发技术总是遭受高成本或大规模应用的复杂过程的缺点。在本文中，已经开发了一种新的且成本有效的方法，以通过简单且可扩展的电化学氧化工艺大量制备整体式3DNGF。得益于增强的电导率，用于快速扩散的孔体积的增加增加了电极与电解质的接触面积，以及由于氮物种的结合而产生的其他活性位点，3DNGFs的高比电容为2250.3 mF / cm（2）在4 mA / cm（2）时具有良好的倍率能力。此外，这种3DNGFs电极还具有出色的长期循环稳定性，在10,000次循环后可以保留其原始电容的97.5％以上。

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  • 来源
    《Journal of Materials Research》 |2018年第9期|1131-1141|共11页
  • 作者

    Guo Wenxian; Chen Meiqiong; Zhang Yan; Yang Wenna; Guo Qiyao; Zhang Min; Cheng Faliang;

  • 作者单位

    Dongguan Univ Technol, Dept City & Environm Sci, City Coll, Dongguan 523419, Guangdong, Peoples R China;

    Dongguan Univ Technol, Dept City & Environm Sci, City Coll, Dongguan 523419, Guangdong, Peoples R China;

    Dongguan Univ Technol, Dept City & Environm Sci, City Coll, Dongguan 523419, Guangdong, Peoples R China;

    Dongguan Univ Technol, Dept City & Environm Sci, City Coll, Dongguan 523419, Guangdong, Peoples R China;

    Dongguan Univ Technol, Dept City & Environm Sci, City Coll, Dongguan 523419, Guangdong, Peoples R China;

    Dongguan Univ Technol, Guangdong Engn & Technol Res Ctr Adv Nanomat, Dongguan 523808, Guangdong, Peoples R China;

    Dongguan Univ Technol, Guangdong Engn & Technol Res Ctr Adv Nanomat, Dongguan 523808, Guangdong, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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