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首页> 外文期刊>RSC Advances >Layer-by-layer assembled (high-energy carbon nanotube/conductive carbon nanotube)(n) nanocomposites for high volumetric capacitance supercapacitor electrodes
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Layer-by-layer assembled (high-energy carbon nanotube/conductive carbon nanotube)(n) nanocomposites for high volumetric capacitance supercapacitor electrodes

机译：逐层组装（高能碳纳米管/导电碳纳米管）（n）用于高容量电容超级电容电极的纳米复合材料

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摘要

We introduce high-performance ultrathin electrochemical electrodes based on multi-stacking of high-energy multiwall carbon nanotube (MWCNT) hybrids and conductive MWCNTs. The MWCNT hybrids coated with oleic acid-stabilized pseudocapacitive nanoparticles (i. e., OA-PC-MWCNTs) were assembled via a sequential covalent-bonded layer-by-layer (LbL) approach with amine-functionalized MWCNTs (NH2-MWCNT) in organic media, generating a highly porous structure and allowing for precise nanoscale control of the electrode thickness. The resultant NH2-MWCNT/OA-PC-MWCNT multilayer electrodes exhibited a high energy capacity and remarkable operational stability, considerably higher than the capacity and stability of conventional blended nanocomposite or electrostatic LbL-assembled electrodes. The volumetric capacitances of the (NH2-MWCNT/OA-Fe3O4-MWCNT)(20) and (NH2-MWCNT/OA-MnO-MWCNT)(20) were approximately 394 +/- 10, and 674 +/- 13 F cm(-3) at 1 A cm(-3), respectively. Additionally, these electrodes maintained their high volumetric capacitances without loss of initial capacitance even after 10 000 cycles; this cycling stability stemmed from the formation of chemically stable covalent bonds between the MWCNT hybrids and NH2-MWCNTs and between the PC NPs and NH2-MWCNTs. Given that a variety of PC NPs can be used to prepare MWCNT hybrids and that this approach can be further expanded to nanocomposite films including LbL-assembled multilayers, our approach may provide a promising platform for designing electrodes for use as thin film-type energy storage devices.
机译：基于高能多壁碳纳米管（MWCNT）杂种和导电MWCNT的多堆叠，我们引入高性能超薄电化学电极。涂有油酸稳定的假壳纳米粒子（即，OA-PC-MWCNT）的MWCNT杂种通过在有机培养基中的胺官能化MWCNT（NH2-MWCNT）的顺序共价键合层（LBL）方法组装。 ，产生高度多孔结构并允许精确的纳米级控制电极厚度。得到的NH2-MWCNT / OA-PC-MWCNT多层电极表现出高能量容量和显着的操作稳定性，显着高于传统混合纳米复合材料或静电LBL组装电极的容量和稳定性。 （NH2-MWCNT / OA-FE3O4-MWCNT）（20）和（NH2-MWCNT / OA-MWCNT）（20）的体积电容约为394 +/- 10，和674 +/- 13 f cm （-3）分别为1厘米（-3）。另外，即使在10 000次循环之后，这些电极也保持了它们的高容量电容而不会损失初始电容;该循环稳定性源于MWCNT杂交种和NH 2 -MWCNT之间的化学稳定的共价键和PC NPS和NH 2 -MWCNT之间的形成。考虑到各种PC NPS可用于制备MWCNT混合动力车，并且这种方法可以进一步扩展到包括LBL组装的多层的纳米复合膜，我们的方法可以为设计电极提供有希望的电极，以便用作薄膜型能量存储器的有希望的平台设备。

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  • 来源
    《RSC Advances》 |2016年第26期|共10页
  • 作者

    Shin Dongyeeb; Ko Yongmin; Cho Jinhan;

  • 作者单位

    Korea Univ Dept Chem &

    Biol Engn Seoul 136713 South Korea;

    Korea Univ Dept Chem &

    Biol Engn Seoul 136713 South Korea;

    Korea Univ Dept Chem &

    Biol Engn Seoul 136713 South Korea;

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  • 正文语种 eng
  • 中图分类 化学;
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