1 research outputs found
Synergistic Interfacial Optimization for High-Sulfur-Content All-Solid-State Lithium–Sulfur Batteries
Improving the sulfur content in the cathode is essential
for achieving
high-energy-density all-solid-state lithium–sulfur batteries
(ASSLSBs). However, the complex multiinterfaces, akin to the short
wooden planks that consist of the cask, severely limit the performance
of ASSLSBs with high sulfur content. Since singular approaches fail
to optimize these interfaces simultaneously, we propose a synergistic
approach using a dual-doped sulfide solid electrolyte (Y2S3 and LiI) and an SbSn alloy sulfur host in this work.
The incorporation of Y2S3 in the solid electrolyte
serves to improve the electrolyte–electrolyte interfaces and
enhance the ionic conductivity, while the inclusion of LiI helps stabilize
the electrolyte–anode interface and suppress dendrite formation.
Meanwhile, the SbSn alloy sulfur host facilitates the transfer of
Li+ at the electrolyte–cathode interfaces. Consequently,
the solid–solid interfaces are significantly improved, leading
to impressive specific capacities in ASSLSBs with high sulfur content
(>44% in the cathode composite) at room temperature (1163.5 mAh
g–1) and at 60 °C (1408.7 mAh g–1) during the 50th cycle at 0.05C. This work presents a promising
strategy for achieving practical high-performance ASSLSBs