Solvothermal Synthesis of Porous MnF2 Hollow Spheroids as Anode Materials for Sodium-/Lithium-Ion Batteries

Porous MnF2 hollow spheroids are synthesized by using a facile solvothermal method. As-synthesized MnF2 exhibits excellent electrochemical properties. The high reversible capabilities of 0.533Ah/g at 0.057A/g and 0.453Ah/g at 0.577A/g are obtained after 150cycles for lithium-ion batteries. Furthermore, the same MnF2 displays a high reversible specific capacity of 0.199Ah/g at 2.308A/g. As to sodium-ion batteries, an initial reversible capability of 0.41Ah/g at 0.01A/g can be acquired and 0.154Ah/g at 0.05A/g can be retained after 150cycles. It is noteworthy that as-synthesized MnF2 could be a promising anode material in both sodium- and lithium-ion batteries.