Monodisperse Molybdenum Nanoparticles as Highly Efficient Electrocatalysts for Li-S Batteries

Lithium-sulfur (Li-S) batteries have attracted widespread attention due to their high theoretical energy density. However, practical application is still hindered by the shuttle effect and sluggish conversion of lithium polysulfides (LiPSs). Herein, monodisperse molybdenum (Mo) nanoparticles embedded onto nitrogen-doped graphene (Mo@N-G) were developed used as a highly efficient electrocatalyst enhance LiPS conversion. The weight ratio in catalyst/sulfur cathode only 9%. unfilled d orbitals oxidized Mo can attract electrons anions form Mo–S bonds during electrochemical process, thus facilitating fast LiPSs. Li-S based on Mo@N-G/S exhibit excellent rate performance, large capacity, superior cycling stability. Moreover, Mo@N-G also plays an important role room-temperature quasi-solid-state batteries. These interesting findings suggest great potential building high-performance