Abstract
A two-step reaction mechanism of oxide materials as anodes in rechargeable lithium batteries was found by comparing discharge–charge curves and cyclic voltammograms of eight oxides. It was also proved by experiments of ex-situ XRD of Sb 2O 3 anode at discharged state. HRTEM images of nanometre SnO at deep discharged state confirmed the two-step reaction mechanism and showed the typical microstructure character of reaction products: the particle was composed of a large amount of nanosized Li–Sn alloy which dispersed in the Li 2O matrix. Furthermore, it was found that the electrochemical properties of SnO anodes were influenced by the particle size of SnO.
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