Sn-doped ZnFe2O4 Anode Materials with Enhanced Lithium Storage Performance.

Sn doped ZnFe₂O₄ samples were prepared by co-precipitation method. It is found that with the increase of Sn content, the phase structure of the prepared samples transformed from single-phase spinel ZnFe₂O₄ to two-phase ZnFe₂O₄/SnO₂ composite and the particle size of samples decreased; The Sn doped ZnFe₂O₄ (with Sn/Fe ratio of 0.05) exhibited the best lithium storage performance among the four samples. For example, after 300 cycles at 1000 mA g⁻¹, the Sn doped ZnFe₂O₄ (with Sn/Fe ratio of 0.05) delivered a reversible capacity of 1163 mA h g⁻¹, much higher than that (715 mA h g⁻¹) of the undoped ZnFe₂O₄. [ABSTRACT FROM AUTHOR]