The electrochemical performance investigation of cobaltous sulfides as host materials in advanced energy storage system

The viability of applying high capacity sulfur cathodes is hindered by the rapid capacity fading, structure degradation, and severe safety problem. Unfortunately, these problems still existed when the lithium-sulfur batteries (LSBs) faced with commercial applications. Consequently, it is urgent to find perfect strategies to modify the properties of LSBs for achieving wide applications. Herein, we present a detailed host material study by immersing sulfur into cobaltous sulfide host materials. Via the material characterization and electrochemical study, some meaningful results were obtained for the sulfur-based cathode during the electrochemical cycles. The electrochemical properties indicated that the as-prepared cobaltous sulfide/S composite cathode exhibited high initial specific capacity and low self-discharge in the LSBs.