mirage

One-pot synthesis of carbon-coated SnO2 nanocolloids with improved reversible lithium storage properties.

DSpace/Manakin Repository

 

Search DR-NTU


Advanced Search Subject Search

Browse

My Account

One-pot synthesis of carbon-coated SnO2 nanocolloids with improved reversible lithium storage properties.

Show full item record

Title: One-pot synthesis of carbon-coated SnO2 nanocolloids with improved reversible lithium storage properties.
Author: Lou, David Xiong Wen.; Chen, Jun Song.; Chen, Peng.; Archer, Lynden A.
Copyright year: 2009
Abstract: We report a simple glucose-mediated hydrothermal method for gram-scale synthesis of nearly monodisperse hybrid SnO2 nanoparticles. Glucose is found to play the dual role of facilitating rapid precipitation of polycrystalline SnO2 nanocolloids and in creating a uniform, glucose-derived, carbon-rich polysaccharide (GCP) coating on the SnO2 nanocores. The thickness of the GCP coating can be facilely manipulated by varying glucose concentration in the synthesis medium. Carbon-coated SnO2 nanocolloids obtained after carbonization of the GCP coating exhibit significantly enhanced cycling performance for lithium storage. Specifically, we find that a capacity of ca. 440 mA h/g can be obtained after more than 100 charge/discharge cycles at a current density of 300 mA/g in hybrid SnO2-carbon electrodes containing as much as 1/3 of their mass in the low-activity carbon shell. By reducing the SnO2-carbon particles with H2, we demonstrate a simple route to carbon-coated Sn nanospheres. Lithium storage properties of the latter materials are also reported. Our results suggest that large initial irreversible losses in these materials are caused not only by the initial, presumably irreversible, reduction of SnO2 as generally perceived in the field, but also by the formation of the solid electrolyte interface (SEI).
Subject: DRNTU::Engineering::Materials.
Type: Journal Article
Series/ Journal Title: Chemistry of materials
School: School of Chemical and Biomedical Engineering
Rights: © 2009 American Chemical Society.

Files in this item

Files Size Format View

There are no files associated with this item.

   

DOI Query

- Get published version (via Digital Object Identifier)
   

This item appears in the following Collection(s)

Show full item record