Abstract
CuFe2O4 with a tetragonally distorted spinel structure has been prepared by the thermal decomposition of a citrate precursor. The copper–iron mixed organic salt was precipitated by either water evaporation or ethanol dehydration. The level of impurities of the final products depended on the precursor precipitation route and annealing temperature. EDH(800) material performed capacity values of 520 mAh/g after 50 cycles. Electron microscopy evidenced that the extrusion of copper yielded both transition metals separately at the end of discharge.
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Acknowledgement
We acknowledge financial support from EC (contract SES6-CT2003-503532, ALISTORE), MEC (Contract MAT2005-00374), and Junta de Andalucía (FQM288 group). We also thank M.C. Mohedano for her technical support and the Central Services of Research of the University of Córdoba, and especially to F. Gracia and J. García, for the use of the electron microscopes and FTIR.
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Bomio, M., Lavela, P. & Tirado, J.L. Electrochemical evaluation of CuFe2O4 samples obtained by sol–gel methods used as anodes in lithium batteries. J Solid State Electrochem 12, 729–737 (2008). https://doi.org/10.1007/s10008-007-0420-3
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DOI: https://doi.org/10.1007/s10008-007-0420-3