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The electrochemical behavior of low-temperature synthesized FeSn2 nanoparticles as anode materials for Li-ion batteries

✍ Scribed by U.G. Nwokeke; R. Alcántara; J.L. Tirado; R. Stoyanova; E. Zhecheva

Publisher
Elsevier Science
Year
2011
Tongue
English
Weight
507 KB
Volume
196
Category
Article
ISSN
0378-7753

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✦ Synopsis

Tin-containing nanometric and amorphous intermetallics and alloys are envisaged as negative electrodes for high-capacity lithium ion batteries. Nanocrystalline FeSn 2 has been prepared by reduction of Sn 2+ and Fe 3+ in tetraethylene glycol at 185 • C. Microcrystalline FeSn 2 has been prepared at 490 • C. The properties of nano-FeSn 2 and micro-FeSn 2 have been observed to be very different. The small particles size hinders the long-range magnetism and consequently the Mössbauer spectra are modified. The nanocrystalline particles of FeSn 2 show exothermal effects in the DTA experiment that are not observed in the micrometric particles. Nanocrystalline FeSn 2 exhibits a much better electrochemical behavior and electrode stability than microcrystalline FeSn 2 .

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