Morphology-controlled synthesis of SnO(2) nanotubes by using 1D silica mesostructures as sacrificial templates and their applications in lithium-ion batteries

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Jianfeng YeLimin Qi

Abstract

SnO(2) nanotubes with controllable morphologies are successfully synthesized by using a variety of one-dimensional (1D) silica mesostructures as effective sacrificial templates. Firstly, 1D silica mesostructures with different morphologies, such as chiral nanorods, nonchiral nanofibers, and helical nanotubes, are readily synthesized in aqueous solution by using the triblock copolymer Pluronic F127 and the cationic surfactant cetyltrimethylammonium bromide as binary templates. Subsequently, the obtained 1D silica mesostructures are used as sacrificial templates to synthesize SnO(2) nanotubes with preserved morphologies via a simple hydrothermal route, resulting in the formation of well-defined SnO(2) nanotubes with different lengths and unique helical SnO(2) nanotubes with a wealth of conformations. It is revealed that both of the short and long SnO(2) nanotubes showed much better performance as anode materials in lithium-ion batteries than normal SnO(2) nanopowders, which might be related to the hollow structure of the nanotubes that could alleviate the volume changes and mechanical stress during charging/discharging cycling. Moreover, the capacity and cycling performance of short nanotubes, which showed a specific discharge ca...Continue Reading

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Nov 16, 2010·Nanoscale Research Letters·Jun Liu, Dongfeng Xue
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