CoS Nanoparticles Anchored on MoS Nanorods As a Superior Bifunctional Electrocatalyst Boosting Li O Heteroepitaxial Growth for Rechargeable Li-O Batteries.

Developing an excellent bifunctional catalyst is essential for the commercial application of Li-O batteries. Heterostructures exhibit great application potential in the field of energy catalysis because of the accelerated charge transfer and increased active sites on their surfaces. In this work, CoS nanoparticles decorated on MoS nanorods are constructed and act as a superior cathode catalyst for Li-O batteries. Coupling MoS and CoS can not only synergistically enhance their electrical conductivity and electrochemical activity, but also promote the heteroepitaxial growth of discharge products on the heterojunction interfaces, thus delivering high discharge capacity, stable cycle performance, and good rate capability.