Hydrothermally Processed Oxide Nanostructures and Their Lithium–ion Storage Properties
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
Nanoscale Research Letters 2010, 5:1841-1845 doi:10.1007/s11671-010-9722-yPublished: 13 August 2010
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.