Issue 38, 2014

Large-scale facile synthesis of Fe-doped SnO2 porous hierarchical nanostructures and their enhanced lithium storage properties

Abstract

Metal oxide porous hierarchical structures are of great significance because of their unique structure-dependent physico-chemical properties and wide applications. Herein, a flower-like Fe-doped SnO2 (Sn1−xFexO2) porous hierarchical architecture was successfully fabricated via a facile coordination polymer (CP) precursor approach. The precursor Snm[Fe(CN)6]n with a flower-like hierarchical structure composed of interconnected nanoplates was obtained by the reaction between Sn2+ and [Fe(CN)6]3− in aqueous solution at ambient temperature without using any surfactant or template. The calcination of the precursor produces a Sn1−xFexO2 hierarchical architecture without any obvious morphological deformation but with numerous mesopores in the nanoplates. The Brunauer–Emmett–Teller N2 adsorption–desorption analysis showed that the sample of Sn0.72Fe0.28O2 obtained under 350 °C calcination had a specific surface area as high as 108.57 m2 g−1 with a pore size of ca. 4 nm. When evaluated as negative electrode materials for lithium-ion batteries, the sample showed a high initial specific capacity of 1281.3 mA h g−1 at a current density of 200 mA g−1, and retained a specific capacity of 600.5 mA h g−1 at the 100th cycle. The significantly enhanced performance towards lithium storage could be attributed to the cooperation of the highly stable hierarchical architecture, porous nanoplate building blocks, and Fe-doping in the SnO2-based materials. It is believed that this facile CP precursor route can be extended to fabricate other doped metal oxide porous hierarchical structures with various functions.

Graphical abstract: Large-scale facile synthesis of Fe-doped SnO2 porous hierarchical nanostructures and their enhanced lithium storage properties

Supplementary files

Article information

Article type
Paper
Submitted
26 Apr 2014
Accepted
24 Jun 2014
First published
24 Jun 2014

J. Mater. Chem. A, 2014,2, 15875-15882

Large-scale facile synthesis of Fe-doped SnO2 porous hierarchical nanostructures and their enhanced lithium storage properties

Y. Yan, F. Du, X. Shen, Z. Ji, X. Sheng, H. Zhou and G. Zhu, J. Mater. Chem. A, 2014, 2, 15875 DOI: 10.1039/C4TA02077D

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