Electrode Design Strategies for High Energy Density All-Solid-State Li-S Batteries

Sulfide solid electrolytes (SEs)-based all-solid-state battery (ASSB) has aroused enormous attention as to be a next-generation energy storage concept that offers enhanced safety. Particularly, the all-solid-state Li-S battery (ASSLSB) technology is the ultimate goal for ASSBs in regard to high energy density by adapting sulfur and Li metal as electrode materials. Herein, we propose the electrode design strategy for the sulfide-based ASSLSBs aiming for a super high energy density by novel synthesis method and precise composition optimization of the electrodes. To develop elaborate interfaces, all of the electrode and electrolyte particles were prepared with nanoscale dimensions. With careful adjustment of the electrode composition, the optimum value to deliver decent electrochemical performances was determined. The present study highlights the importance of electrode fabrication in electrochemical performance and provides insights into the electrode design to fulfill key requirements needed to be utilized in sulfide-based all-solid-state Li-S batteries.