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Article

Critical Size of a Nano SnO₂ Electrode for Li-Secondary Battery

Chunjoong Kim,^† Mijung Noh,^‡ Myungsuk Choi,^† Jaephil Cho,*^‡ and Byungwoo Park*^†

School of Materials Science and Engineering, and Research Center for Energy Conversion and Storage, Seoul National University, Seoul, Korea, and Department of Applied Chemistry, Kumoh National Institute of Technology, Gumi, Korea

Chem. Mater., 2005, 17 (12), pp 3297–3301

DOI: 10.1021/cm048003o

Publication Date (Web): May 10, 2005

†

Seoul National University.

‡

Kumoh National Institute of Technology.

Corresponding authors. E-mail: byungwoo@snu.ac.kr (B.P.); jpcho@ kumoh.ac.kr (J.C.).

Abstract

SnO₂ nanoparticles with different sizes of 3, 4, and 8 nm were synthesized using a hydrothermal method at 110, 150, and 200 °C, respectively. The results showed that the 3 nm-sized SnO₂ nanoparticles had a superior capacity and cycling stability as compared to the 4 and 8 nm-sized ones. The 3 nm-sized nanoparticles exhibited an initial capacity of 740 mAh/g with negligible capacity fading. The electrochemical properties of these nanoparticles were superior to those of thin-film analogues. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) confirmed that the 3 nm-sized SnO₂ nanoparticles after electrochemical tests did not aggregate into larger Sn clusters, in contrast to those observed with the 4 and 8 nm-sized ones.

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History

Published In Issue June 14, 2005
Received November 13, 2004
Revised Manuscript Received March 18, 2005

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Article

Critical Size of a Nano SnO₂ Electrode for Li-Secondary Battery