SnO2@C@VO2 Composite Hollow Nanospheres as an Anode Material for Lithium-Ion Batteries.
SnO2@C@VO2 Composite Hollow Nanospheres as an Anode Material for Lithium-Ion Batteries.
复制标题
DOI：
10.1021/acsami.7b19448
复制
发表时间：
2018-04
影响因子：
9.5
通讯作者：
Wenbin Guo;Yong Wang;Qingyuan Li;Dongxia Wang;Fanchao Zhang;Yiqing Yang;Yang Yu
中科院分区：
文献类型：
--
作者：
Wenbin Guo;Yong Wang;Qingyuan Li;Dongxia Wang;Fanchao Zhang;Yiqing Yang;Yang Yu
通过层层沉积和氧化还原反应的结合，巧妙地构建了多孔SnO2@C@VO2复合空心纳米球。此外，为了优化电化学性能，还研究了不同外部VO含量的SnO2@C@VO2复合空心纳米球。一方面，SnO2@C@VO2复合材料中的弹性导电碳作为中间层，不仅可以缓冲重复循环过程中巨大的体积变化，而且可以有效提高电子电导率，提高SnO2和VO2的利用率，具有较高的理论容量。另一方面，复合材料的中空纳米结构可以通过多层纳米组件固结，从而具有出色的循环稳定性。凭借上述各个组分的协同贡献，SnO2@C@VO2复合空心纳米球表现出较大的初始放电容量（1305.6mAhg-1）和出色的循环稳定性（100次循环后765.1mAhg-1）。这种复合空心纳米球的设计可以扩展到用于电化学储能的其他纳米材料的合成。
Porous SnO2@C@VO2 composite hollow nanospheres were ingeniously constructed through the combination of layer-by-layer deposition and redox reaction. Moreover, to optimize the electrochemical properties, SnO2@C@VO2 composite hollow nanospheres with different contents of the external VO2 were also studied. On the one hand, the elastic and conductive carbon as interlayer in the SnO2@C@VO2 composite can not only buffer the huge volume variation during repetitive cycling but also effectively improve electronic conductivity and enhance the utilizing rate of SnO2 and VO2 with high theoretical capacity. On the other hand, hollow nanostructures of the composite can be consolidated by the multilayered nanocomponents, resulting in outstanding cyclic stability. In virtue of the above synergetic contribution from individual components, SnO2@C@VO2 composite hollow nanospheres exhibit a large initial discharge capacity (1305.6 mAhg-1) and outstanding cyclic stability (765.1 mAhg-1 after 100 cycles). This design of composite hollow nanospheres may be extended to the synthesis of other nanomaterials for electrochemical energy storage.