Abstract: Irreversibleconsumption of sulfur aroused from shuttle reactionis the major challenge for liquid electrolyte lithium–sulfurbatteries, although various sulfur-based cathodes have been designed.In this work, strict constraint of sulfur to eradicate the polysulfideshuttling is realized in the nanostructure of carbon-coated metalsulfides instead of pure sulfur cathodes. The nanoparticles are composedof a carbon shell and iron disulfide core (FeS₂@C), fabricatedby the plasma evaporation method and postsulfurization. The Fe–Sbonds in FeS₂ chemically attract the sulfur atoms duringtheir lithiation reaction, while the carbon shell physically blocksthe sulfur loss within the enclosed construction. Owing to the remarkabledual constraint of S, the FeS₂@C cathode delivers a stablespecific capacity of 862 mA hg^–1 after 300 cycles.The assembled battery cells exhibit stable electrochemical performancewhen they are operated safely in the temperature range from 60 to 25 °C.

DOI：10.1021/acsaem.0c01929