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首页> 外文期刊>Advanced Functional Materials >Confined Volume Change in Sn-Co-C Ternary Tube-in-Tube Composites for High-Capacity and Long-Life Lithium Storage
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Confined Volume Change in Sn-Co-C Ternary Tube-in-Tube Composites for High-Capacity and Long-Life Lithium Storage

机译：用于大容量和长寿命锂存储的Sn-Co-C三元管中复合材料的受限体积变化

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摘要

All high capacity Li-alloy anodes for Li-ion battery suffer from enormous volume expansion and extraction during the lithium-ion insertion and extraction process. A Sn-Co-CNT@CNT ternary tube-in-tube nanostructure is prepared by an in situ template technique and shows perfect structure suitability to solve the critical volume change problem. The morphology, size, and quantity of the filled CNT-supported Sn-Co nanoparticles can be also tuned by adjusting the experimental conditions to achieve optimal electrochemical performances. The tube-in-tube product exhibits larger-than-theoretical reversible capacities of 890-811 mA h g~(-1) at 0.1 C in 200 cycles and excellent rate capability and high-rate cycling stability. The excellent electrochemical performance is mainly attributed to the confined volume change in the nanotube cavities and ensured permanent electrical connectivity of the immobilized Sn-Co anodes.
机译：用于锂离子电池的所有高容量锂合金阳极在锂离子插入和提取过程中都遭受巨大的体积膨胀和提取。通过原位模板技术制备了Sn-Co-CNT @ CNT三元管-管纳米结构，并显示出完美的结构适用性来解决关键的体积变化问题。还可通过调整实验条件来实现最佳的电化学性能，从而调整填充的CNT负载的Sn-Co纳米粒子的形态，大小和数量。该管中管产品在200°C循环中在0.1 C时具有890-811 mA h g〜（-1）的理论可逆容量，并且具有出色的倍率能力和高倍率循环稳定性。优异的电化学性能主要归因于纳米管腔体中有限的体积变化，并确保了固定式Sn-Co阳极的永久电连接性。

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  • 来源
    《Advanced Functional Materials》 |2013年第7期|893-899|共7页
  • 作者

    Yan Gu; Fendan Wu; Yong Wang;

  • 作者单位

    Department of Chemical Engineering School of Environmental and Chemical Engineering Shanghai University Shangda Road 99, Shanghai, P. R. China, 200444;

    Department of Chemical Engineering School of Environmental and Chemical Engineering Shanghai University Shangda Road 99, Shanghai, P. R. China, 200444;

    Department of Chemical Engineering School of Environmental and Chemical Engineering Shanghai University Shangda Road 99, Shanghai, P. R. China, 200444;

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