Synthesis of hierarchical worm-like SnO 2 @C aggregates and their enhanced lithium storage properties

Published

Journal Article

© 2014 Elsevier B.V. All rights reserved. The present paper reports a synthetic strategy of hierarchical worm-like SnO 2 @C aggregates with enhanced electrochemical performances. Specifically, a glucose-assisted hydrothermal treatment of the intermediate Co-Sn alloy nanoparticles, which were formed by carbothermal reduction of mixed commercial SnO 2 and Co 3 O 4 nanoparticles. The SnO 2 @C sample exhibits enhanced cycling performance in comparison with raw commercial SnO 2 nanoparticles and intermediate Co-Sn alloy nanoparticles when used as anode of lithium ion battery. A stable capacity of 533.6 mA h g -1 at 100 mA g -1 and 477.0 mA h g -1 at 400 mA g -1 remains after 60 cycles. When the current density increases to 1600 mA g -1 , the SnO 2 @C sample still deliver a high capacity of 384.2 mA h g -1 . The superior electrochemical performances could be attributed to the synergistic effect of unique worm-like aggregates structure and carbon surface-layer, which facilitate the electron transportation and buffer the large volume change.

Full Text

Duke Authors

Cited Authors

  • Wu, ZG; Li, JT; Zhong, YJ; Liu, J; Guo, XD; Huang, L; Zhong, BH; Sun, SG

Published Date

  • September 16, 2014

Published In

Volume / Issue

  • 620 /

Start / End Page

  • 407 - 412

International Standard Serial Number (ISSN)

  • 0925-8388

Digital Object Identifier (DOI)

  • 10.1016/j.jallcom.2014.08.176

Citation Source

  • Scopus