Hollow bean-pod-like SiO2-supported-SnO2/C nanocomposites for durable lithium and sodium storage
Hollow bean-pod-like SiO2-supported-SnO2/C nanocomposites for durable lithium and sodium storage
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DOI：
10.1039/c6ta09381g
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发表时间：
2017-01
影响因子：
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通讯作者：
Linyu Yang;Site Li;Jun Liu;Kunjie Zhu;Sailin Liu;M. Lei
中科院分区：
文献类型：
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作者：
Linyu Yang;Site Li;Jun Liu;Kunjie Zhu;Sailin Liu;M. Lei
为了更好地解决SnO2基负极材料的大体积膨胀问题，设计了一种具有足够内部空隙的中空豆荚状二氧化硅负载SnO2/C纳米结构。这种结构中存在双空穴，结合芯中的二氧化硅载体和外层的碳，为提高SnO2基储锂和纳阳极材料的性能提供了三重保证。结果表明，锂离子电池在550次充放电循环后仍可获得649 mA h g−1的放电容量，在1000次充放电循环后仍可保持104 mA h g−1的放电容量。
In order to better resolve the large volume expansion problem of SnO2-based anode materials, a hollow bean-pod-like SiO2-supported-SnO2/C nanostructure with a sufficient internal void space is designed. Dual voids exist in this structure in combination with a SiO2 support in the core and carbon as an outside shell, providing triple guarantees to improve the performance of SnO2-based anode materials for Li and Na storage. As a result, after 550 charge/discharge cycles, a discharge capacity of 649 mA h g−1 can still be obtained for Li storage, and a discharge capacity of 104 mA h g−1 can still be maintained after 1000 charge/discharge cycles for Na storage.