%0 Journal Article
%T Electrocatalysis of Ruthenium Nanoparticles-Decorated Hollow Carbon Spheres for the Conversion of Li2S2/Li2S in Lithium每Sulfur Batteries
%J -
%D 2018
%R https://doi.org/10.1021/acsami.8b09339
%X Controlling ※polysulfide dissolution§ and pacifying ※polysulfide shuttle§ hold the key in developing a lithium每sulfur battery with superior electrochemical performance. Further, exploration of the concept of electrocatalysts plays a significant role in enhancing the electrochemical reversibility of polysulfides in lithium每sulfur battery. Herein, ruthenium nanoparticles-decorated porous, hollow carbon spheres have been successfully prepared and deployed as electrocatalyst as well as sulfur host in the lithium每sulfur battery assembly. Interaction of sulfur with ruthenium nanoparticles has been explained with appropriate electroanalytical and electrochemical characterization techniques. We observe that lithium每sulfur battery containing C每Ru每S cathode with a fixed sulfur loading exhibits a significantly improved capacity of 1200 mA h g每1 at C/10 current rate for 100 cycles. Volume expansion-related issues are found to get addressed by the hollow structured carbon spheres, and the electrocatalytic activity will improve the reaction kinetics of the conversion of Li2S2 to Li2S and vice versa
%U https://pubs.acs.org/doi/10.1021/acsami.8b09339