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首页> 外文期刊>Journal of power sources >Mesoporous carbon-encapsulated NiO nanocomposite negative electrode materials for high-rate Li-ion battery
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Mesoporous carbon-encapsulated NiO nanocomposite negative electrode materials for high-rate Li-ion battery

机译：高速锂离子电池用介孔碳包裹的NiO纳米复合负极材料

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摘要

In this study, a novel mesoporous carbon-encapsulated NiO nanocomposite is proposed and demonstrated for Li-ion battery negative electrode. The nanostructure of the electrode composes of an ordered mesoporous CMK-3 as a 3D nanostructured current collector with micorporous channels for Li~+ transportation. In addition, exclusive formation of NiO nanoparticles in the confined space of the ordered mesoporous carbon is achieved using the hydrophobic encapsulation route. The half-cell assembled with the synthesized NiO/CMK-3 nanocomposite is able to deliver a high charge capacity of 812mAhg~(-1) at the first cycle at a C-rate of 1000mAg~(-1) and retained throughout the test with only 0.236% decay per cycle. Even the C-rate as high as 3200mAg~(-1) a charge capacity of 808mAhg~(-1) contributed by the NiO nanoparticles in CMK-Ni is obtained, which shows excellent rate capability for NiO with utilization close to 100%. The result suggests fast kinetics of conversion reaction for NiO with Li~+. It also indicates the blockage of the pore channels by NiO nanoparticles does not take place in the synthesized NiO/CMK-3.
机译：在这项研究中，提出了一种新型的介孔碳包覆的NiO纳米复合材料，并用于锂离子电池负极。电极的纳米结构由有序介孔CMK-3构成，作为3D纳米结构的集电器，具有用于Li〜+传输的微通道。另外，使用疏水性包封途径实现了在有序中孔碳的密闭空间中NiO纳米颗粒的排他性形成。与合成的NiO / CMK-3纳米复合材料组装的半电池能够在第一个循环以1000mAg〜（-1）的C速率提供812mAhg〜（-1）的高充电容量，并在整个测试过程中保持不变每个周期仅衰减0.236％。甚至获得了高达3200mAg〜（-1）的C速率，由CMK-Ni中的NiO纳米颗粒贡献的808mAhg〜（-1）的充电容量，这显示了对NiO的出色的速率能力，利用率接近100％。结果表明，NiO与Li〜+的转化反应具有快速动力学。这也表明在合成的NiO / CMK-3中没有发生NiO纳米颗粒阻塞孔道的情况。

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  • 来源
    《Journal of power sources》 |2010年第15期|p.4977-4983|共7页
  • 作者

    Ming-Yao Cheng; Bing-Joe Hwang;

  • 作者单位

    Nano-electrochemistry Laboratory, Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan, ROC;

    Nano-electrochemistry Laboratory, Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan, ROC National Synchrotron Radiation Research Center, Hsinchu 300, Taiwan, ROC Sect. 4, Keelung Rd., Taipei, 106, Taiwan, ROC;

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

    mesoporous; anode; negative electrode; lithium ion battery; nickel oxide; nanopartide; high rate;

    机译：中孔阳极;负极;锂离子电池;氧化镍纳米粒子高几率;

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