Encapsulating sulfur in δ-MnO2 at room temperature for Li-S battery cathode

Sulfur spheres were encapsulated in δ-MnO2 shell at room temperature with the help of polydopamine and KMnO4 via a green method. The obtained S@MnO2 cathode delivers high capacity and improved coulombic efficiency when used for Li-S batteries. Benefitting from the versatile surface-adherent property of polydopamine and the mild reaction environment, this method has extensive applications on constructing Mn-based oxides hybrid materials.222