材料科学
复合数
阳极
电化学
锂(药物)
化学工程
纳米结构
纳米材料
复合材料
纳米技术
导电体
多孔性
图层(电子)
电极
化学
物理化学
内分泌学
工程类
医学
作者
Wenbin Guo,Yong Wang,Qingyuan Li,Dongxia Wang,Fanchao Zhang,Yong Yang,Yang Yu
标识
DOI:10.1021/acsami.7b19448
摘要
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.
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