Ice-templated preparation and sodium storage of ultrasmall SnO2 nanoparticles embedded in three- dimensional graphene

We report on the ice-templated preparation and sodium storage of ultrasmall SnO2 nanoparticles （3--4 nm） embedded in three-dimensional （3D） graphene （SnO2@3DG）. SnO2@3DG was fabricated by hydrothermal assembly with ice-templated 3DG and a tin source. The structure and morphology analyses showed that...

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Bibliographic Details
Published in:Nano research 2015-01, Vol.8 (1), p.184-192
Main Authors: Pei, Longkai, Jin, Qi, Zhu, Zhiqiang, Zhao, Qing, Liang, Jing, Chen, Jun
Format: Article
Language:English
Subjects:
Atomic/Molecular Structure and Spectra
Batteries
Biomedicine
Biotechnology
Chemical vapor deposition
Chemistry and Materials Science
Condensed Matter Physics
Graphene
Materials Science
Nanoparticles
Nanotechnology
Research Article
Scanning electron microscopy
SnO2
Sodium
三维
二氧化锡
嵌入
模板制备
石墨
纳米粒子
超小型
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Summary:We report on the ice-templated preparation and sodium storage of ultrasmall SnO2 nanoparticles （3--4 nm） embedded in three-dimensional （3D） graphene （SnO2@3DG）. SnO2@3DG was fabricated by hydrothermal assembly with ice-templated 3DG and a tin source. The structure and morphology analyses showed that 3DG has an interconnected porous architecture with a large pore volume of 0.578 cm^3·g^-1 and a high surface area of 470.5 m^2·g^-1. In comparison, SnO2@3DG exhibited a pore volume of 0.321 cmg.g^-1 and a surface area of 237.7 m^2·g^-1 with a homogeneous distribution of ultrasmall SnO2 nanoparticles in a 3DG network. SnO2@3DG showed a discharge capacity of 1,155 mA-h·g^-1 in the initial cycle, a reversible capacity of 432 mA·h·g^-1 after 200 cycles at 100 mA·g^-1 （with capacity retention of 85.7% relative to that in the second cycle）, and a discharge capacity of 210 mAh·g^-1 at a high rate of 800 mA·g^-1 This is due to the high distribution of SnO2 nanoparticles in the 3DG network and the enhanced facilitation of electron/ion transport in the electrode.
ISSN:1998-0124
1998-0000
DOI:10.1007/s12274-014-0609-6