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

Abstract Porous MnF 2 hollow spheroids are synthesized by using a facile solvothermal method. As‐synthesized MnF 2 exhibits excellent electrochemical properties. The high reversible capabilities of 0.533 Ah/g at 0.057 A/g and 0.453 Ah/g at 0.577 A/g are obtained after 150 cycles for lithium‐ion batteries. Furthermore, the same MnF 2 displays a high reversible specific capacity of 0.199 Ah/g at 2.308 A/g. As to sodium‐ion batteries, an initial reversible capability of 0.41 Ah/g at 0.01 A/g can be acquired and 0.154 Ah/g at 0.05 A/g can be retained after 150 cycles. It is noteworthy that as‐synthesized MnF 2 could be a promising anode material in both sodium‐ and lithium‐ion batteries.