Journal
ELECTROCHIMICA ACTA
Volume 106, Issue -, Pages 143-148Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.05.073
Keywords
SnO2; Nano-particles; Molten salt method; Electrochemical properties
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Funding
- MOE [WBS-R-284-000-076-112]
- National Research Foundation (NRF) Singapore NRF-CRP Grant [R-144-000-295-281, R-143-000-360-281]
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We prepared nano-sized tin (IV) oxide (SnO2) via molten-salt technique: heating a mixture of tin tetrachloride, lithium nitrate and lithium chloride at 280 degrees C in air. The powders are characterized by X-ray diffraction and transmission scanning microscopy techniques. The XRD studies showed a structure similar to tetragonal structure. The cyclic voltammetry studies showed characteristic cathodic peak potentials of reduction of Sn4+ to Sn metal in the first cathodic scan, and alloying-de-alloying reaction of Sn at similar to 0.25 and similar to 0.5 V vs. Li for successive cathodic and anodic scans cycled in the voltage range, 0.005-1.0V. Galvanostatic cycling studies show that reversible capacities (MSM SnO2 prepared at 280 degrees C) of 640, 720, 890 mAh g(-1) in the voltage range, 0.005-1.0V, 0.005-1.3V and 0.005-1.5V, respectively at a current rate of 100 mA g(-1). We also discussed the effect of particle size and its electrochemical properties in the voltage range, 0.005-1.0V. (c) 2013 Elsevier Ltd. All rights reserved.
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