Fabrication of Hollow MgFe2O4 Microspheres for High Performance Anode of Lithium Ion Battery

In this work, spinel MgFe 2 O 4 hollow structural microspheres were fabricated through an environmental friendly hydrothermal carbon templating approach with subsequently annealing process in air, where carbon spheres plays as template to create void space, and that promote metal source loading into colloidal carbon sphere. The resultant hollow MgFe 2 O 4 sphere possess excellent textural properties of a large void space size (50-80nm) and tailored shell thickness(25-35nm). The spinel MgFe 2 O 4 hollow structural microspheres used as an anode material for rechargeable lithium-ion battery possesses a high initial discharge specific capacity of 616.3 mAh g -1 at a stable current density of 500 mAh g -1 and the capacity retention of 559.9 mAh g -1 by 18 cycles. The excellent electrochemical performances of the spinel MgFe 2 O 4 hollow structural microspheres may be associated with the special porous hollow structures, which deliver an easy Li + diffusion pathway and facilitate charge transfer and alleviate the volume variation and diminishes polarization in cycling.