MoO2-ordered mesoporous carbon nanocomposite as an anode material for lithium-ion batteries.
MoO2-ordered mesoporous carbon nanocomposite as an anode material for lithium-ion batteries.
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DOI：
10.1021/am303286n
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发表时间：
2013-03
影响因子：
9.5
通讯作者：
Lingxing Zeng;Cheng Zheng;C. Deng;Xiaokun Ding;Mingdeng Wei
中科院分区：
文献类型：
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作者：
Lingxing Zeng;Cheng Zheng;C. Deng;Xiaokun Ding;Mingdeng Wei
本文首次采用碳热还原途径，以介孔碳为纳米反应器合成了moo2有序介孔碳纳米复合材料（MoO2-OMC）。通过x射线衍射（XRD）、热重分析（TGA）、N2吸附-解吸、扫描电镜（SEM）和透射电镜（TEM）等手段对合成的纳米复合材料进行了表征。此外，该纳米复合材料被用作锂离子插入的负极材料，具有大的可逆容量、高倍率性能和良好的循环稳定性。例如，在50ma g（-1）的电流密度下，经过50次循环后，可保持689 mAh g（-1）的高可逆容量。值得一提的是，MoO2-OMC纳米复合电极可以在高达2 a g（-1）的电流密度下获得401 mAh g（-1）的高可逆容量。这些结果可能是由于纳米复合材料的固有特性，它提供了更好的应变和体积变化的调节，并提供了更短的锂离子和电子传输路径，从而提高了容量和速率能力。
In the present work, the nanocomposite of MoO2-ordered mesoporous carbon (MoO2-OMC) was synthesized for the first time using a carbon thermal reduction route and the mesoporous carbon as the nanoreactor. The synthesized nanocomposite was characterized by X-ray diffraction (XRD), thermogravimetric analysis (TGA), N2 adsorption-desorption, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) measurements. Furthermore, this nanocomposite was used as an anode material for Li-ion intercalation and exhibited large reversible capacity, high rate performance, and good cycling stability. For instance, a high reversible capacity of 689 mAh g(-1) can remain after 50 cycles at a current density of 50 mA g(-1). It is worth mentioning that the MoO2-OMC nanocomposite electrode can attain a high reversible capacity of 401 mAh g(-1) at a current density as high as 2 A g(-1). These results might be due to the intrinsic characteristics of nanocomposite, which offered a better accommodation of the strain and volume changes and a shorter path for Li-ion and electron transport, leading to the improved capacity and enhanced rate capability.