Record number :
115285
Title of article :
Synthesis and Characterization of Sn Nanophases in a Ta2O5 Matrix
Author/Authors :
Ahn، Hyo-Jin نويسنده , , Park، Kyung-Won نويسنده , , Sung، Yung-Eun نويسنده ,
Issue Information :
ماهنامه با شماره پیاپی سال 2004
Pages :
-1990
From page :
1991
To page :
0
Abstract :
To investigate the effect of Sn-Ta2O5 nanostructures on lithium insertion and extraction, size-controlled Sn-Ta2O5 nanostructured electrodes, consisting of Sn nanoparticles in an amorphous, porous Ta2O5 matrix, were designed and fabricated using a cosputtering system with Sn metal and Ta2O5 targets. Transmission electron microscopy revealed well-dispersed Sn particles with average particle sizes of ~19 nm (sample A), ~30 nm (sample B), and ~50 nm (sample C). Both X-ray photoelectron spectroscopy and X-ray diffraction analysis of Sn-Ta2O5 confirmed that the Sn particles exist as a metallic crystalline structure, whereas the Ta2O5 matrix was present in an amorphous state. The performance of the Sn-Ta2O5 nanostructured electrode was superior to that of a Sn thin-film electrode during lithium insertion and extraction. The high-performance in the Sn-Ta2O5 nanostructured electrode is due to the larger number of reactive sites of Sn nanoparticles and the facilitation of the movement of lithium ions through the porous Ta2O5 matrix.
Journal title :
CHEMISTRY OF MATERIALS
Serial Year :
2004
Link To Document :
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