Hollow spheres of MgFe2O4 as anode material for lithium-ion batteries

Sub-micrometer hollow spherical MgFe2O4 was prepared via a solvothermal method without subsequently annealing process. Morphological characterizations show that there are large quantities of hollow spheres with the size of around 300 nm. And the particle size is relatively uniform. Its first discharge specific capacity at 0.1 C (107.2 mA g−1) is 1344 mA h g−1 with an initial irreversible capacity loss of about 28%. The capacities stabilize at around 900 mAh g−1 with a coulombic efficiency of nearly 98% after 70 cycles.119