Shape-controlled synthesis and lithium storage properties of SnO₂ nonspherical hollow structures

Abstract

In this work, a variety of uniform SnO 2 nonspherical hollow structures, such as peanuts, capsules and pseudocubes, can be synthesized by using monodisperse hollow silica nonspherical colloids with different shapes as templates. The method is based on a polycrystalline SnO 2 coating on the surface of the hollow silica colloidal template with different shapes and the sequential HF-dissolution of the silica. It is noted that the shapes of these SnO 2 nonspherical hollow structures are similar to those of the colloidal templates. By virtue of the hollow interior voids, the SnO 2 hollow structures with different shapes exhibit improved lithium storage properties compared to SnO 2 solid spheres. Electronic supplementary information (ESI) available: FESEM and TEM images of monodisperse SiO 2 hollow colloids with different shapes; EDX spectra and TEM images of double-shelled SiO 2 @SnO 2 hollow structures with different shapes; EDX spectra and TEM images of SnO 2 hollow structures with different shapes; TEM, SAED and HRTEM images of SnO 2 solid spheres and SnO 2 hollow structures with different shapes; Coulombic efficiency of SnO 2 solid spheres and SnO 2 hollow structures with different shapes; SEM images of SnO 2 hollow structures with different shapes aer 60 cycles. See

Synthesis of SnO2pillared carbon using long chain alkylamine grafted graphene oxide: an efficient anode material for lithium ion batteries

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Double-shelled support and confined void strategy to improve the lithium storage properties of SnO2/C anode materials for lithium-ion batteries

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