Abstract
Herein, to reduce the excessive interior space of hollow SnO2@C nanotubes, a particular composite (SnO2 NWs@void@SnO2@C) consisting of SnO2@C nanotubes encapsulating SnO2 nanowires has been constructed through a carefully planned method. When assessed as an anode material for lithium-ion batteries, the as-prepared SnO2 NWs@void@SnO2@C exhibits excellent performance, revealing high capacities of 1164 and 683 mAh g−1 after 320 and even 1000 cycles at 200 and 1000 mA g−1, respectively. Notably, the excellent performance is benefited from the synergistic effect of structure advantages of SnO2 NWs@void@SnO2@C such as one-dimensional wires-in-tubes nanostructure, carbon coating, thin shells, void free space, and large surface area. Also thus excellent performance endows SnO2 NWs@void@SnO2@C with great promising for an advanced anode material of lithium-ion batteries.
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