Abstract
An ideal hybrid mode for titanium dioxide (TiO2) and tin dioxide (SnO2) is that the SnO2 nanoparticles locate in interspaces of 3-deminsional TiO2 hierarchical structure constructed by one-dimensional units, in which the sizes of interspaces can be adjusted via the inverse movement among the units to smartly accommodate the huge expansion/contraction of SnO2 anode during long-term cycling process, but its achievement is full of challenges. Herein, a smart strategy has been proposed to facilely fabricate a TiO2/SnO2/Carbon (TiO2/SnO2/C) composite with a similar nanostructure with above ideal mode for the first time, which is composed of SnO2/C nanoparticles located in the interspaces among quasi-TiO2/C nanowires. Expectedly, the as-fabricated TiO2/SnO2/C composite exhibits greatly improved lithium storage, delivering high capacities of 851.5 and 415 mAh g−1 after 400 and 700 cycles at 200 and even 1000 mA g−1, respectively. This work may provide a new strategy for development of high performance SnO2-based composite anodes for lithium-ion batteries.
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