Facile synthesis of MgFe2O4/C composites as anode materials for lithium-ion batteries with excellent cycling and rate performance

Abstract

A MgFe₂O₄/C material is prepared by a sol–gel auto-combustion process followed by carbon coating with glucose as a carbon source. The obtained MgFe₂O₄/C sample shows remarkably enhanced specific capacity and rate performance. A reversible capacity of about 1965 mA h g⁻¹ after 100 cycles at 0.1C (107.2 mA g⁻¹) is obtained. Specifically, the MgFe₂O₄/C composite electrode delivers a reversible specific capacity of 500 mA h g⁻¹ even at 10C (10 000 mA g⁻¹), indicating the excellent rate capability of the MgFe₂O₄ electrode.