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Porous SnO@C@VO composite hollow nanospheres were ingeniously constructed through the combination of layer-by-layer deposition and redox reaction. Moreover, to optimize the electrochemical properties, SnO@C@VO composite hollow nanospheres with different contents of the external VO were also studied. On the one hand, the elastic and conductive carbon as interlayer in the SnO@C@VO composite can not only buffer the huge volume variation during repetitive cycling but also effectively improve electronic conductivity and enhance the utilizing rate of SnO and VO 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, SnO@C@VO composite hollow nanospheres exhibit a large initial discharge capacity (1305.6 mAhg) and outstanding cyclic stability (765.1 mAhg 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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