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Open Access NANO EXPRESS

Hydrothermally Processed Oxide Nanostructures and Their Lithium–ion Storage Properties

Jung-Ho Ahn1*, Yong-Jin Kim2 and Guoxiu Wang3

Author Affiliations

1 School of Material Engineering, Andong National University, 388 Songchun-dong, Andong, Gyungbuk, 760-010, Korea

2 Functional Materials Division, Korea Institute of Materials Science, Sangnan-dong, Changwon, Gyungnam, 641-010, Korea

3 Department of Chemistry and Forensic Science, University of Technology, Sydney, NSW, 2007, Australia

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Nanoscale Research Letters 2010, 5:1841-1845  doi:10.1007/s11671-010-9722-y

Published: 13 August 2010

Abstract

Y- and Si-based oxide nanopowders were synthesized by a hydrothermal reaction of Y or Si powders with NaOH or LiOH aqueous solution. Nanoparticles with different morphology such as elongated nanospheres, flower-like nanoparticles and nanowires were produced by a control of processing parameters, in particular, the starting composition of solution. The preliminary result of electrochemical examination showed that the hydrothermally processed nanowires exhibit high initial capacities of Li-ion storage: 653 mAh/g for Y2O3 nanowires as anode materials and 186 mAh/g for Li2Si2O5 nanowires as cathode materials in a Li secondary cell. Compared to the powder with elongated sphere or flower-like shapes, the nanowires showed a higher Li-ion capacity and a better cycle property.

Keywords:
Hydrothermal reaction; Nanowires; Li-ion cell; Nanopowders; Crystal growth