A facile carbothermal preparation of Sn–Co–C composite electrodes for Li-ion batteries using low-cost carbons
作者： Francisco Nacimiento , Pedro Lavela , José Luis Tirado , Juan Miguel Jiménez-Mateos
DOI: 10.1007/S10008-011-1469-6
关键词: Metal 、 Analytical chemistry 、 Dielectric spectroscopy 、 Dispersion (chemistry) 、 Materials science 、 Mössbauer spectroscopy 、 Ion 、 Composite number 、 Electrochemistry 、 Electrode
摘要: Sn–Co–C composites were prepared by carbothermal reaction of ball-milled precursors. X-ray diffraction and 119Sn Mossbauer spectroscopy the original revealed predominance Sn CoSn2 phases for those samples with a high Sn/Co ratio. Electron microscopy images showed homogeneous dispersion sub-micrometric metallic particles in carbon matrix. Galvanostatic cycling at several kinetic rates that Sn7Co1C92 Sn8Co4C88 are able to maintain 400 mA h g−1 after 40 cycles 35 g−1. The large contribution cycled electrodes is responsible good electrochemical performance. This interpretation also supported impedance measurements.
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